| 1. |
- Aignon, Hyppolite L., et al.
(författare)
-
Mallocybe africana (Inocybaceae, Fungi), the first species of Mallocybe described from Africa
- 2021
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 478:1, s. 49-60
-
Tidskriftsartikel (refereegranskat)abstract
- The family Inocybaceae has been poorly studied in Africa. Here we describe the first species of the genus Mallocybe from West African and Zambian woodlands dominated by ectomycorrhizal trees of Fabaceae and Phyllanthaceae. The new species M. africana is characterized by orange-brown fruitbodies, a fibrillose pileus, a stipe tapered towards the base and large ellipsoid basidiospores. It resembles many north and south temperate species of Mallocybe but is most closely related to the southeast Asian tropical species, M. errata. M. africana is widely distributed in West Africa (Benin, Togo, Burkina Faso and Ivory Coast) extending to South-eastern Africa in Zambia. Phylogenetic analyses based on 5.8S rDNA, nLSU and RPB2 sequence data confirm that M. africana is nested within Mallocybe. A complete morphological description and illustrations, including photographs and line drawings, are presented.
|
|
| 2. |
- Al-Handal, Adil Y, 1952, et al.
(författare)
-
Fallacia fawensis sp. nov., a new brackish water diatom (Bacillariophyceae) from Southern Iraq
- 2022
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 550:1, s. 71-78
-
Tidskriftsartikel (refereegranskat)abstract
- The diatom genus Fallacia includes species having a conopeum which is a perforated thin sheath of silica lying along the apical axis on the external valve face and a hyaline lateral area in the internal valve face. In surveying the benthic diatoms of Basra, a new small brackish water species, Fallacia fawensis was found associated with fine-grained substrata on the western bank of Shatt Al???Arab River, Southern Iraq. This epipelic species is described based on light and scanning electron microscopy and characterized by having a porous conopeum covering the area between raphe sterna and mantle, narrow elongated marginal striae, and a structure similar to lateral hyaline areas in the valve internal side. The terminal raphe endings on the external valve face, below valve apex, the raphe sternum inner margins come close to each other, blocking raphe canal but leaving a lacuna-like thin groove for connection with the deflected upper part of the open raphe canal. These features separated this species from allied taxa of the genus and also from closely related genera, Pseudofallacia and Germaniella. Notes on the ecology and distribution of the new species as well as the associated diatom taxa are provided.
|
|
| 3. |
- Al-Handal, Adil Y, 1952, et al.
(författare)
-
Marine benthic diatoms in the newly discovered coral reefs, off basra coast, southern Iraq
- 2018
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3163 .- 1179-3155. ; 372:2, s. 111-152
-
Tidskriftsartikel (refereegranskat)abstract
- The recent discovery of coral reefs off Basra, Southern Iraq, have prompted the investigation of marine benthic assemblages in this unexplored ecosystem. These corals are thriving in an environment with conditions not usually considered typical for reefs, such as increased turbidity, temperature fluctuation, and currents. This study documents 96 diatom taxa belonging to 33 genera, 18 of which were not previously known from the Arabian (Persian) Gulf including six taxa of Amphora and five of Campylodiscus. The most common genera were Amphora with 17 taxa, Nitzschia with 10 taxa, and Navicula with nine taxa. Most notably is the very rare occurrence of Mastogloia, which has been previously documented as speciose in coral reef habitats. Similarly, araphid and monoraphid species were uncommon in these diatom communities. The large species of the epipelic diatom Trachyneis are well represented and appeared commonly in all samples examined.
|
|
| 4. |
- Al-Handal, Adil Y, 1952, et al.
(författare)
-
Mastogloia jahniae sp. nov., a new diatom (Bacillariophyceae) from the Baltic Sea coast of Sweden
- 2021
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 484:1, s. 121-128
-
Tidskriftsartikel (refereegranskat)abstract
- Described is here Mastogloia jahniae sp. nov. a species new to science from Skatan on the Baltic Sea, east coast of Sweden. Description of this new species is based on light and scanning electron microscopy. The new species is classified in the Mastogloia section Ellipticae and is characterized by having radiating short and long striae around the central area, sinuous raphe branches and partecta displaced toward the middle of the valve by a siliceous flange. M. jahniae sp. nov. in terms of size is rather small whereas in terms of ecology appears an epipelic brackish water species. The new species was rather rare in all samples collected from Skatan and has not been found in the other adjacent regions sampled. A comparison with similar established Mastogloia species is provided.
|
|
| 5. |
- Al-Handal, Adil Y, 1952, et al.
(författare)
-
Rhoicosphenia johannessoniae (Bacillariophyceae), a new diatom from the Swedish coast of the Baltic Sea
- 2023
-
Ingår i: Phytotaxa. - 1179-3155 .- 1179-3163. ; 618:1, s. 69-78
-
Tidskriftsartikel (refereegranskat)abstract
- Rhoicosphenia is a relatively small diatom genus regarding the number of species and the genus is characterized by its wedge-shaped frustule and heterovalvar structure. It is one of the few genera that is distributed in both marine and freshwater habitats. Few species of Rhoicosphenia are known along the stretched Baltic Sea coast of Sweden. The present study describes a new epiphytic species of Rhoicosphenia from the brackish water of Grisslehamn in the northern part of the Baltic Sea. Rhoicosphenia johannessoniae sp. nov. appears closely related to R. baltica, but differs in having more elongated and protracted base pole, densely packed areolae and a central area located below the central part of the valve. Detailed descriptions of the species based on light and electron microscopy, as well as a comparison with related taxa, are provided. The present work is part of a larger project aiming to study the littoral diatoms of Sweden. The finding of this species, together with other species previously described within the project, will add to our knowledge of the diatom assemblages of the Baltic Sea which seems to have a richer flora than earlier anticipated.
|
|
| 6. |
|
|
| 7. |
- Aydin, Zeynep, et al.
(författare)
-
A new section of Silene (Caryophyllaceae) including a new species from South Anatolia, Turkey
- 2014
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 178:2, s. 98-112
-
Tidskriftsartikel (refereegranskat)abstract
- Silene section Cryptoneurae (Caryophyllaceae) and S. ertekinii from Western Antalya, Turkey, are described as new taxa on the basis of morphological and molecular investigations. Nuclear ITS and chloroplast rps16 DNA sequences clearly support the recognition of the new section. Inclusiveness and characterization of the new section is discussed and described, and a key for the included species is provided. Diagnostic characters of the new species S. ertekinii are given and its relation to the other species of the section is discussed.
|
|
| 8. |
- Bahram, Mohammad
(författare)
-
A new Stephanospora (Agaricales, Basidiomycota) from the Yucatan peninsula, Mexico
- 2020
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 436, s. 63-71
-
Tidskriftsartikel (refereegranskat)abstract
- Stephanospora xibalba is described from the Yucatan peninsula, Mexico, based on morphological and molecular data. This species is characterized by the small red-orange basidiomata, broadly ellipsoid to ellipsoid basidiospores (6.8-11.6 x 6.3-9.5 mu m) with a small (3.2-4.5 x 1-1.5 mu m) partial corona, and the association with Gymnopodium floribundum.
|
|
| 9. |
- Bustamante-Gil, Carolina, et al.
(författare)
-
Checklist, new records, and taxonomic annotations of freshwater thecate dinoflagellate (Dinophyceae) in Colombia
- 2021
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 509:2, s. 135-167
-
Tidskriftsartikel (refereegranskat)abstract
- A study on the freshwater dinoflagellate (Dinophyceae) of Colombia was carried out based on samples from four swamps, nine reservoirs, a small insular lake, and additional specimens deposited in the phycological collection of Universidad de Antioquia, Colombia, and the collection of Universidad de La Plata, Argentina. For most species, detailed morphological descriptions and illustrations are provided. Moreover, the geographical distribution of the species is updated. Durinskia spp., Glochidinium penardiforme, Naiadinium polonicum, Peridiniopsis elpatiewskyi, Peridiniopsis quadridens, and Sphaerodinium fimbriatum, are reported for the first time in Colombia. Furthermore, the correct sulcal plate pattern was determined for Naidinium polonicum which has been misinterpreted in earlier literature.
|
|
| 10. |
- Cavender, J. C., et al.
(författare)
-
Distribution and ecology of dictyostelids in Madagascar
- 2021
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 505:2, s. 176-186
-
Tidskriftsartikel (refereegranskat)abstract
- Samples for isolation of dictyostelid cellular slime molds were obtained from 20 collecting sites at 18 localities in south central and southeastern Madagascar during May 2009. At least thirty species of dictyostelids representing seven genera were recovered from 52 samples of soil/humus. This total included 17 species described as new to science, 13 species already known from various localities throughout the world, and four isolates that remain unidentified. Fourteen of the new species isolated from these samples are members of the whorl-branched, light-spored genus Heterostelium (formerly Polysphondylium). The overall level of species richness of dictyostelids in Madagascar is greater than what is known for all of mainland Africa sampled to date. Levels of biodiversity in Madagascar were higher for mesic than for xeric vegetation types, and each of the newly described species of Heterostelium appeared to have a limited distribution among the localities sampled.
|
|
| 11. |
- Cavender, James C., et al.
(författare)
-
New dictyostelid cellular slime molds from South Africa
- 2018
-
Ingår i: Phytotaxa. - : MAGNOLIA PRESS. - 1179-3155 .- 1179-3163. ; 383:3, s. 233-251
-
Tidskriftsartikel (refereegranskat)abstract
- A distributional study of the dictyostelid cellular slime molds (dictyostelids) of South Africa was carried out during 2006 as part of the Global Biodiversity of Eumycetozoans project based at the University of Arkansas and funded by the National Science Foundation Samples of soil/humus collected from 31 study sites yielded a total of 881 clones, with an average density of 210 clones/gram for all samples in which dictyostelids were detected. Eighteen different species were represented by one or more clones, and six of these could not be identified. These six species are described herein as new to science. In addition, information is provided on the ecological distribution of all of the species of dictyostelids now known to occur in South Africa.
|
|
| 12. |
- Daniels, Pablo P., et al.
(författare)
-
A new species and a new combination of Rhodophana (Entolomataceae, Agaricales) from Africa
- 2017
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 306:3, s. 223-233
-
Tidskriftsartikel (refereegranskat)abstract
- Multiple collections of a new member of the Entolomataceae were found in W National Park of Niger during a survey of macrofungi. This new species with a dark reddish brown scaly pileus surface and a yellow stipe belongs in the genus Rhodophana of the Rhodocybe-Clitopilus clade in the Entolomataceae. Using a three-gene analysis of the phylogenetic position of Rhodophana flavipes it is most closely related to the recently described Rhodophana squamulosa from India and is a sister taxon to Rhodophana nitellina and R. melleopallens. Micromorphological examination of the type of Rhodocybe fibulata, another African species with a scaly cap, confirms that it belongs in Rhodophana, thus a new combination Rhodophana fibulata is proposed.
|
|
| 13. |
- De Boer, Hugo J., et al.
(författare)
-
Molecular phylogenetic analyses of Cucurbitaceae tribe Benincaseae urge for merging of Pilogyne with Zehneria
- 2015
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 236:2, s. 173-183
-
Tidskriftsartikel (refereegranskat)abstract
- The tropical cucurbitaceous genus Zehneria as traditionally circumscribed displays much morphological diversity. Recent taxonomic revisions have resulted in its redefinition through both recognition and subsequent lumping of several additional genera. This study utilized plastid and nuclear DNA sequence data to reconstruct a molecular phylogeny of Zehneria and its close relatives in order to test whether these revisions reflected the molecular evolution in this group. The results suggest that Neoachmandra is monophyletic, and that Zehneria in a restricted sense and Neoachmandra accessions form a single monophyletic clade, whereas Pilogyne in its present understanding is polyphyletic. In the light of these results Pilogyne should be merged back into Zehneria from which it was split off earlier.
|
|
| 14. |
- De Lima Ferreira, Paola, et al.
(författare)
-
Touch me carefully: a step towards understanding morphological diversity in the South American spiny sunflowers (Compositae, Barnadesioideae)
- 2021
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 518:2, s. 109-142
-
Tidskriftsartikel (refereegranskat)abstract
- The subfamily Barnadesioideae (Compositae) is endemic to South America, comprising 10 genera and 80 species of mostly spiny herbs, subshrubs, shrubs, trees, or woody vines distributed from Venezuela to Argentina. Three genera, Dasyphyllum (27 species), Chuquiraga (22 spp.) and Barnadesia (19 spp.) contain 85% of the species, while the other seven genera (Archidasyphyllum, Arnaldoa, Doniophyton, Duseniella, Fulcaldea, Huarpea, and Schlechtendalia) are represented by up to three species each. Most species are found in xeric areas in the Andean and Patagonian regions-as in the Paramos, Puna and Patagonian steppe vegetation-with a secondary center of diversity in eastern South America. Previous phylogenetic hypotheses have clarified the relationships within the subfamily, showing that there are many non-monophyletic groups in different taxonomic ranks. As a result, taxonomic changes have been proposed over recent decades in order to reflect classifications comprising only monophyletic groups. In the present study, we provide a generic synopsis of the subfamily Barnadesioideae based on the most recent generic circumscriptions, including a key, expanded morphological descriptions, information on geographical distribution and habitat, photographs and taxonomic notes for all genera.
|
|
| 15. |
- Draper, Isabel, et al.
(författare)
-
Molecular andmorphological circumscription of Brachytheciumcoruscum as a separate taxon from Brachytheciumalbicans (Brachytheciaceae, Bryophyta)
- 2014
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 158, s. 182-194
-
Tidskriftsartikel (refereegranskat)abstract
- Nuclear ITS, and chloroplast rpl16 and trnG sequences, together with morphological data, were used to circumscribe some problematic taxa within the complex around the pleurocarpous moss Brachythecium albicans. Brachythecium coruscum is consistently different from B. albicans, and its description is here amended. On the contrary, segregation of Brachythecium dumetorum from B. albicans is unsupported both according to molecular and morphological data, and the two taxa are therefore considered to be synonyms.
|
|
| 16. |
- Ekman, Stefan
(författare)
-
The Bacidia coprodes group (Ramalinaceae, Lecanoromycetes, Ascomycota), with special reference to the species in Europe and North America
- 2014
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 191:1, s. 66-80
-
Tidskriftsartikel (refereegranskat)abstract
- This paper aims to clarify taxonomy and nomenclature of the lichen Bacidia coprodes and its closest relatives in Europe and North America. Bacidia coprodes as treated in recent works was found to consist of three distinct species in Europe and North America, the correct names of which are B. coprodes (s. str.), B. notarisiana, and B. granosa. In addition, a fourth species, B. inornata (Nyl.) Blomb. & Forssell, was found to be closely related to this group of lichens and is also treated here. The four species can be separated by apothecial and pycnidial pigmentation as well as conidium shape and size. They are closely related to species currently treated in Bacidia, Toninia, or Arthrosporum. Six basionyms, viz. Bilimbia coprodes, Patellaria salevensis, Bilimbia subtrachona, Lecidea chytrina, L. chytrina var. hormospora, and L. inornata, are lectotypified. Detailed descriptions and a determination key are provided.
|
|
| 17. |
- Esteve-Raventos, F., et al.
(författare)
-
Inocybe vaurasii (Agaricales, Inocybaceae), a new species of the I. xanthomelas group and similar European species with asteriform spores
- 2022
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 566:2, s. 171-188
-
Tidskriftsartikel (refereegranskat)abstract
- Inocybe vaurasii is described as a new species belonging to Section Marginatae group Xanthomelas. A comparative mor-phological and molecular study has been carried out with other species showing basidiospores with stellate appearance and similar sizes: I. xanthomelas, I. humilis and I. subrimosa. An ITS bar code was obtained from type materials of all three of these species. The molecular analysis reveals that, despite the similarity in spore-shape, none of the species were closely related, but form distinct clades that are spread out within the Xanthomelas group. SEM photographs of the spores are pro-vided for each of the species studied. A lectotype for I. subrimosa is designated and validated and the lectotype previously designated for I. xanthomelas is here validated.
|
|
| 18. |
- Ferm, Julia, et al.
(författare)
-
Paracarphalea, a new genus of the coffee family segregated from the Malagasy endemic genus Carphalea (Rubiaceae, Rubioideae, Knoxieae)
- 2016
-
Ingår i: Phytotaxa. - Magnolia Press : Magnolia Press. - 1179-3155 .- 1179-3163. ; 263:2, s. 98-112
-
Tidskriftsartikel (refereegranskat)abstract
- The Malagasy genus Carphalea (Rubiaceae) consists of six species (C. angulata, C. cloiselii, C. kirondron, C. linearifolia, C. madagascariensis, C. pervilleana) of shrubs or small trees and is recognizable by a distinctly lobed calyx, 2(–4)-locular ovaries, each locule with several ovules on a rod-like stalk arising from the base of the locule, and indehiscent fruits. Carphalea linearifolia, rediscovered in 2010, has not previously been included in any Rubiaceae molecular phylogenetic studies. We re-investigated the monophyly of Carphalea using sequence data from chloroplast (rps16 and trnT-F) and nuclear (ITS and ETS) markers analysed with parsimony and Bayesian methods. Carphalea linearifolia forms a clade with C. cloiselii and the type species C. madagascariensis. This clade is sister to a clade consisting of the rest of the Carphalea species plus the genus Triainolepis. According to these results, the new genus Paracarphalea is here described to accommodate Carphalea angulata, C. kirondron, and C. pervilleana. Theconservation status of Carphalea linearifolia is assessed as critically endangered according to IUCN criteria.
|
|
| 19. |
- Frisch, Andreas
(författare)
-
Arthoniaceae with reddish, K plus purple ascomata in Japan
- 2018
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 356, s. 19-33
-
Tidskriftsartikel (refereegranskat)abstract
- Arthonia sanguinaria is described as new to science. The East Asian Arthonia lopingensis and the widely distributed. Arthonia picea are reported as new to Japan from Honshu and the Ogasawara Islands, respectively. The phylogenetic position of A. picea, A. sanguinaria and Coniocarpon cinnabarinum from the Ogasawara Islands is shown by RAxML and Bayesian analysis of mtSSU, nLSU and RPB2 sequence data. Our results confirm the polyphyletic origin of quinoid pigments in Arthoniaceae. A key is presented to the Arthoniaceae with reddish ascomata in Japan.
|
|
| 20. |
- Frohlich, Michael W., et al.
(författare)
-
Ninety-three new combinations in Euploca for species of Heliotropium section Orthostachys (Boraginaceae sensu APG)
- 2020
-
Ingår i: Phytotaxa. - : MAGNOLIA PRESS. - 1179-3155 .- 1179-3163. ; 434:1, s. 13-21
-
Tidskriftsartikel (refereegranskat)abstract
- Many new combinations are needed in Euploca, previously regarded as Heliotropium section Orthostachys, to correspond with results of our forthcoming, world-wide, molecular phylogenetic analysis. We also need these names for our many delta C-13 determinations that identify many Euploca species exhibiting C-4 photosynthesis and show that other Euploca species are not C-4. Here we make the many new combinations required to support these results.
|
|
| 21. |
- Gerasimova, Julia V., et al.
(författare)
-
Taxonomy and nomenclature of seven names in Bacidia (Ramalinaceae, Lecanorales) described from Russia
- 2017
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 316:3, s. 292-296
-
Tidskriftsartikel (refereegranskat)abstract
- We aim to increase understanding and improve taxonomy of seven names currently treated in Bacidia that were described from Russian territory based on material collected during 19th-century expeditions: Bacidia alborussula, B. freshfieldii, B. graminum, B. indigens, B. primigenia, B. subabbrevians, and B. xylophila. B. alborussula, B. graminum, and B. indigens are transferred here to Haematomma, Lecania, and Bacidina, respectively. Bacidia freshfieldii and B. subabbrevians belong in the Ramalinaceae and are provisionally kept in Bacidia even though none of them is congeneric with the type of that genus. B. primigenia belongs in Arthrorhaphis, but we refrain from making any new combination owing to its questionable status as a species distinct from A. grisea. B. xylophila is a younger synonym of Lecania subfuscula. We designate lectotypes for names previously not typified and for which syntypes exist: Lecidea alborussula, L. graminum, L. indigens, and L. subabbrevians.
|
|
| 22. |
|
|
| 23. |
- Goncalez, V. M., et al.
(författare)
-
Two new species of Pavonia (Malvoideae, Malvaceae) from southern Bahia, Brazil
- 2017
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 305:2, s. 97-103
-
Tidskriftsartikel (refereegranskat)abstract
- Two new species of Pavonia subgenus Goetheoides are described (Pavonia gerleniae and Pavonia macrobracteolata) from the wet coastal forests of eastern Brazil. This increases the number of species in the subgenus to 30, which is considered a high level of diversity for arborescent species in this geographically and ecologically limited area. We present morphological descriptions and comments, taxonomic relationships, pictures and conservation status of these species.
|
|
| 24. |
- Heenan, Peter B., et al.
(författare)
-
Morphological and phylogenetic relationships of the threatened geophyte Wurmbea novae-zelandiae (Colchicaceae) from New Zealand, with notes on typification
- 2017
-
Ingår i: Phytotaxa. - : MAGNOLIA PRESS. - 1179-3155 .- 1179-3163. ; 307:2, s. 123-132
-
Tidskriftsartikel (refereegranskat)abstract
- The new combination Wurmbea novae-zelandiae was recently made based on published phylogenetic studies, but little information was provided on its relationships based on morphology. This species was originally described as Anguillaria novae-zelandiae, for which a lectotype is designated. Morphological characters of W. novae-zelandiae are re-evaluated and shown to be characteristic of Wurmbea, thereby supporting the revised generic placement. However, W. novae-zelandiae differs from all other Wurmbea species in its diminutive stature, fewer tepals and stamens, and variable floral morphology, with 1-3 carpels, often leaf-like tepals, and aberrant tepal shape and number. DNA sequence data places W. novae-zelandiae as the sister species of W. uniflora, a species not included in earlier phylogenetic studies. These two species share mostly solitary flowers with white tepals, nectaries two per tepal and similar in form and position, small yellow anthers, and styles that are relatively short and recurve as flowering proceeds, with the inner style surface stigmatic for up to half of its length. A revised generic description of Wurmbea is provided to take account of the recently widened concept.
|
|
| 25. |
|
|
| 26. |
- Hillmann, Georg
(författare)
-
Leprose and leproid lichens of the Galapagos, with a particular focus on Lepraria (Stereocaulaceae) and Septotrapelia (Pilocarpaceae)
- 2013
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 150, s. 1-28
-
Tidskriftsartikel (refereegranskat)abstract
- As part of an ongoing species inventory for the Galapagos Archipelago, sterile leprose and leproid lichens have been revised. Differences between leprose vs. leproid growth forms are discussed in the light of significant recent advances in the taxonomy of Lepraria. Five species have a strictly leprose morphology: Lepraria achariana, L. aff. incana, L. finkii, and L. vouauxii (all new to Galapagos), and L. lendemeri sp. nov. A sixth species, L. tenella, forms minutely fruticose thalli, but its recent transfer from Leprocaulon into Lepraria confirms its close affinity to species with similar chemistry such as L. vouauxii. Even though L. vouauxii does not develop pseudopodetia, it forms thalli that closely resemble immature specimens of L. tenella. Fertile material of a seventh species, "Lepraria" usnica, also new to Galapagos, confirms that this species does indeed belong in the Pilocarpaceae as molecular studies previously indicated. Its apothecia are identical to those of a Septotrapelia. Consequently, the recently described genus Nelsenium is reduced to synonymy and the new combination Septotrapelia usnica proposed. Many other sterile lichens occur in Galapagos and several have a very similar, leproid or even leprose morphology. A key for all those taxa is presented, emphasizing their inconspicuous, though distinct morphological differences.
|
|
| 27. |
- Jafari, F., et al.
(författare)
-
Notes on the genus Silene (Caryophyllaceae, Sileneae) in Iran
- 2019
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 425:1, s. 35-48
-
Tidskriftsartikel (refereegranskat)abstract
- Two new species-Silene orientoalborzensis and S. circumcarmanica-are here described from Northeast and South Iran, respectively. They belong to Silene subg. Silene sect. Auriculatae which is the largest section of the genus in W-Asia. A specimen from center of Iran, which was identified erroneously as S. atocioides, is revised and identified as S. pendula which represents a new record for the Iranian flora. S. simsii is proposed as a nomen novum for Cucubalus multifidus.
|
|
| 28. |
- Jeppson, M., et al.
(författare)
-
Bovista hollosii-a new puffball (Lycoperdaceae) from sand steppe vegetation in Hungary
- 2016
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 268:2, s. 145-154
-
Tidskriftsartikel (refereegranskat)abstract
- A new puffball species, Bovista hollosii, belonging to Bovista subgenus Bovista is described. It is morphologically reminiscent of B. tomentosa but differs in peridial and spore features. Molecular data confirm it as distinct from B. tomentosa. The new species is recorded from sand steppe habitats in Central Hungary. A key to the north and central European species belonging to subgenus Bovista is provided along with illustrations of the new described species.
|
|
| 29. |
- Kainulainen, Kent, 1978-, et al.
(författare)
-
New taxonomic combinations in West Indian Ocean Vanguerieae (Rubiaceae)
- 2016
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 282:4, s. 267-272
-
Tidskriftsartikel (refereegranskat)abstract
- This paper provides new combinations for two species endemic to the Seychelles, Canthium carinatum and C. sechellarum, which are transferred to Peponidium (tribe Vanguerieae, Ixoroideae, Rubiaceae), as supported by recent molecular phylogenetic analyses. Several new combinations in Vanguerieae from Madagascar are also proposed, based on morphological studies. Canthium bakerianum and C. homolleanum are transferred to Peponidium, whereas C. andringitrense, C. mandrarense, and Peponidium montana are transferred to Pyrostria. The names Pyrostria angustifolia, P. media, and P. major, previously invalid, are here validly published.
|
|
| 30. |
- Karis, Per Ola, 1955-, et al.
(författare)
-
Second-step lectotypification of Stobaea rigida and reassessment of heterotypic synonyms of Berkheya rigida (Asteraceae, Arctotideae)
- 2024
-
Ingår i: Phytotaxa. - 1179-3155 .- 1179-3163. ; 641:4, s. 267-276
-
Tidskriftsartikel (refereegranskat)abstract
- As part of a taxonomic reassessment of species that were classified in Berkheya series Rigidae in the most recent monograph of Berkheya, the type material for Berkheya rigida and its putative heterotypic synonyms is reassessed. The original material for the basionym, Stobaea rigida, is heterospecific. Therefore, a second-step lectotype is designated consistent with predominant usage of the name Berkheya rigida. The name Apuleia rigida and its replacement name Stobaea gaertneri apply to a conspicuously radiate species and are excluded from the synonymy of Berkheya rigida. The morphological variability of Berkheya rigida is discussed.
|
|
| 31. |
- Kruys, Åsa
(författare)
-
New species of Preussia with 8-celled ascospores (Sporormiaceae, Pleosporales, Ascomycota)
- 2015
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 234:2, s. 143-150
-
Tidskriftsartikel (refereegranskat)abstract
- The focus of this study is on Preussia sensu lato species with 8-celled ascospores. Two new species, P. alpina and P. octocylindrospora are introduced based on morphological characters and discussed in relation to similar species in the genus. New records are provided from Sporormiella corynespora, S. octomegaspora, P. octomera and P. octonalis. This greatly expands or reduces their geographical distribution ranges, as well as substrate preferences. In addition, a key to the coprophilous species with 8-celled ascospores is provided.
|
|
| 32. |
- Ligowski, R., et al.
(författare)
-
Rhoicosphenia michali: a new species of marine diatom (Bacillariophyta) from King George Island, Antarctica
- 2014
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 191:1, s. 141-153
-
Tidskriftsartikel (refereegranskat)abstract
- Rhoicosphenia michali sp. nov., described from the shallow sublittoral zone in Antarctica, is the second species in the genus with just one raphe slit on its convex valve. The first species, Rhoicosphenia flexa, was also described from marine coastal habitats in the Southern Hemisphere. Here, the morphology and ecology of R. flexa and R. michali are compared. The new species described herein may be endemic to Antarctica and can be found as free living cells on the shallow seabed, although it mainly occurs on the red alga Georgiella confluens, which is endemic to Antarctica.
|
|
| 33. |
- Lumbsch, H. Thorsten, et al.
(författare)
-
One hundred new species of lichenized fungi: a signature of undiscovered global diversity
- 2011
-
Ingår i: Phytotaxa. - 1179-3163. ; 18, s. 1-127
-
Tidskriftsartikel (refereegranskat)abstract
- The number of undescribed species of lichenized fungi has been estimated at roughly 10,000. Describing and cataloging these would take the existing number of taxonomists several decades; however, the support for taxonomy is in decline worldwide. In this paper we emphasize the dire need for taxonomic expertise in lichenology. We bring together 103 colleagues from institutions worldwide to describe a total of 100 new species of lichenized fungi, representing a wide taxonomic and geographic range. The newly described species are: Acarospora flavisparsa, A. janae, Aderkomyces thailandicus, Amandinea maritima, Ampliotrema cocosense, Anomomorpha lecanorina, A. tuberculata, Aspicilia mansourii, Bacidina sorediata, Badimia multiseptata, B. vezdana, Biatora epirotica, Buellia sulphurica, Bunodophoron pinnatum, Byssoloma spinulosum, Calopadia cinereopruinosa, C. editae, Caloplaca brownlieae, C. decipioides, C. digitaurea, C. magnussoniana, C. mereschkowskiana, C. yorkensis, Calvitimela uniseptata, Chapsa microspora, C. psoromica, C. rubropulveracea, C. thallotrema, Chiodecton pustuliferum, Cladonia mongkolsukii, Clypeopyrenis porinoides, Coccocarpia delicatula, Coenogonium flammeum, Cresponea ancistrosporelloides, Crocynia microphyllina, Dictyonema hernandezii, D. hirsutum, Diorygma microsporum, D. sticticum, Echinoplaca pernambucensis, E. schizidiifera, Eremithallus marusae, Everniastrum constictovexans, Fellhanera borbonica, Fibrillithecis sprucei, Fissurina astroisidiata, F. nigrolabiata, F. subcomparimuralis, Graphis caribica, G. cerradensis, G. itatiaiensis, G. marusa, Gyalideopsis chicaque, Gyrotrema papillatum, Harpidium gavilaniae, Hypogymnia amplexa, Hypotrachyna guatemalensis, H. indica, H. lueckingii, H. paracitrella, H. paraphyscioides, H. parasinuosa, Icmadophila eucalypti, Krogia microphylla, Lecanora mugambii, L. printzenii, L. xanthoplumosella, Lecidea lygommella, Lecidella greenii, Lempholemma corticola, Lepraria sekikaica, Lobariella sipmanii, Megalospora austropacifica, M. galapagoensis, Menegazzia endocrocea, Myriotrema endoflavescens, Ocellularia albobullata, O. vizcayensis, Ochrolechia insularis, Opegrapha viridipruinosa, Pannaria phyllidiata, Parmelia asiatica, Pertusaria conspersa, Phlyctis psoromica, Placopsis imshaugii, Platismatia wheeleri, Porina huainamdungensis, Ramalina hyrcana, R. stoffersii, Relicina colombiana, Rhizocarpon diploschistidina, Sticta venosa, Sagenidiopsis isidiata, Tapellaria albomarginata, Thelotrema fijiense, Tricharia nigriuncinata, Usnea galapagona, U. pallidocarpa, Verrucaria rhizicola, and Xanthomendoza rosmarieae. In addition, three new combinations are proposed: Fibrillithecis dehiscens, Lobariella botryoides, and Lobariella pallida.
|
|
| 34. |
- Lönnell, Niklas
(författare)
-
New combinations within the genus Sphagnum (Sphagnaceae, Bryophyta)
- 2018
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 369, s. 57-58
-
Tidskriftsartikel (refereegranskat)abstract
- The genus Sphagnum is known for its morphological variable species, showing plastic responses along environmental gradients (Stenøien et al. 1997). Consequently, species delimitation based on morphological characters is not always straight forward. However, molecular analysis have in some cases pointed to differentiated entities within morphologically recognised taxa, e.g. Sphagnum fuscum (Schimper 1871:63) Klinggräff (1872:4) and Sphagnum magellanicum Bridel (1798:24) (Kyrkjeeide et al. 2015, Yousefi et al. 2017). In other cases, molecular markers have not resolved closely related taxa. A study based on isoenzymes could, for instance, not differentiate Sphagnum viride Flatberg (1988:9) from Sphagnum cuspidatum Ehrh. ex Hoffmann (1796:22) (Hanssen et al. 2000). Moreover, a study based on isoenzymes and RAPD could not differentiate Sphagnum isoviitae Flatberg (1992:2) and Sphagnum brevifolium (Lindb. ex Braithwaite (1878:84)) Röll (1889:340) from Sphagnum fallax (Klinggräff 1872:7) Klinggräff (1880: 128) (Såstad et al. 1999). Hence, the treatment of these taxa at the species level may be questioned. The material used in the studies was limited, and the use of more modern molecular markers might lead to other conclusions. Recognition of the taxa at variety level seems to be a reasonable solution, given our current knowledge. We therefore propose that S. viride, S. isoviitae and S. brevifolium be treated at the variety level while we await more comprehensive genetic studies, which may provide conclusive evidence concerning the status of these taxa.
|
|
| 35. |
- Maldonado, C., et al.
(författare)
-
Cinchona anderssonii (Rubiaceae), a new overlooked species from Bolivia
- 2017
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 297:2, s. 203-208
-
Tidskriftsartikel (refereegranskat)abstract
- Cinchona anderssonii, a new species from the Yungas forests of the Andes in Bolivia, is described and illustrated. It is unique in Cinchona by having the combination of elliptic leaf blades glossy above, distinct circular pit domatia at secondary vein axils, basipetally dehiscent capsules, and relatively large seeds (8-11 mm long). A taxonomic key for the identification of the Cinchona species occurring in Bolivia is presented.
|
|
| 36. |
- Mashburn, Brock, et al.
(författare)
-
Burmeistera quimiensis (Lobelioideae, Campanulaceae): A New Species from the Cordillera Del Cóndor Range in Southeast Ecuador.
- 2020
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 433:1
-
Tidskriftsartikel (refereegranskat)abstract
- Abstract A new taxon belonging to the genus Burmeistera (Campanulaceae, Lobelioideae) is described from El Quimi Biological Reserve in Morona Santiago Province, southeast Ecuador. Burmeistera quimiensis is characterized by its red-violet stems and veins, spiral phyllotaxy, bullate, ascending leaves with a revolute margin, puberulous abaxial leaf surface, cupuliform hypanthia, and thick-walled white to red-violet fruits with reflexed pedicels. Photos of the new species are given, as well as a distribution map of known collection localities, and its relationships with other species are discussed.
|
|
| 37. |
- Medlin, Linda K., et al.
(författare)
-
MIDTAL (Microarrays for the Detection of Toxic Algae)
- 2013
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 127:1, s. 201-210
-
Tidskriftsartikel (refereegranskat)abstract
- Microalgae in marine and brackish waters of Europe regularly cause harmful effects, considered from the human perspective, in that they cause economic damage to fisheries and tourism. Cyanobacteria cause similar problems in freshwaters. These episodes encompass a broad range of phenomena collectively referred to as harmful algal blooms (HABs). For adequate management of these phenomena, monitoring of microalgae is required. However, present day monitoring is time consuming and based on morphology as determined by light microscopy, which may be insufficient to give definitive species and toxin attribution. In the European Union (EU) FP7 project MIDTAL (microarrays for the detection of toxic algae), we will first target rapid species identification using rRNA genes. The variable regions of the rRNA genes can be used for probe design to recognize species or even strains. Second, a toxin based microarray will be developed that includes antibody reactions to specific toxins produced by these microalgae because even when cell numbers are low, toxins can be present and can accumulate in the shellfish. Microarrays are the state of the art technology in molecular biology for the processing of bulk samples for detection of target RNA/DNA sequence. Existing rRNA probes and antibodies for toxic algal species/strains and their toxins will be adapted and optimized for microarray use. The purpose of MIDTAL is to support the common fisheries policy and to aid the national monitoring agencies by providing new rapid tools for the identification of toxic algae and their toxins so they can comply with EU directive 91/1491/CEE to monitor for toxic algae, and reduce the need for the mouse bioassay.
|
|
| 38. |
- Mehregan, Iraj, et al.
(författare)
-
Donysia avia (Primulaceae), a new species from Zagros Mountains, Iran
- 2021
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 511:3, s. 296-300
-
Tidskriftsartikel (refereegranskat)abstract
- Dionysia avia, a new species from Esfahan province of Iran, is described, illustrated and compared with similar and related species. The new species is similar to D. bachtiarica and D. lamingtonii, but differs from the former mainly in showing isophylly and having abaxially pubescent leaves, pubescent calyx lobes and corollas, and capsules with 5-6 seeds, and can be distinguished from the latter mainly by its looser habit, softer and larger leaves, and calyx split to the base. A distribution map and a key to D. avia and similar species is provided.
|
|
| 39. |
- Mekkerdchoo, O., et al.
(författare)
-
Tracing the evolution and economic potential of konjac glucomannan in Amorphophallus species (Araceae) using molecular phylogeny and RAPD markers
- 2016
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 282:2, s. 81-106
-
Tidskriftsartikel (refereegranskat)abstract
- The genus Amorphophallus is an economically important taxon that is abundant in Old World tropical forests (Asia, Oceania and Africa). It includes many species that are used with increasing frequency as a source of food and pharmaceutical products worldwide. Amorphophallus konjac is an important economic crop and has been used widely in China and Japan for commercial konjac glucomannan (KGM) production. However, the species’ range does not extend to Thailand, where other closely related species may be more suitable for commercial KGM production. Present understanding of genetic relaionships among Thai Amorphophallus species is still limited, and the connection between evolutionary history and KGM content is unknown. Here, the genetic relationships among various accessions of Amorphophallus spp. collected in Thailand are investigated using the chloroplast trnL-trnF spacer, nuclear ribosomal internal transcribed spacer (ITS) region and the second intron of LEAFY (FLint2) together with genome-wide DNA variation analysis, Randomly Amplified Polymorphic DNA (RAPD) technique. RAPD primers are also developed to quickly and efficiently identify species producing high levels of KGM. This study finds that two monophyletic clades include high KGM content species. RAPD analyses indicate that primer AC-10 generates specific bands identifying species belonging only to the high and medium KGM content clades. These primers can be used as a screening tool for economical species, aiming at improving the industrial production of KGM in Thailand and the world. © 2016 Magnolia Press.
|
|
| 40. |
- Montesinos-Tubee, Daniel B., et al.
(författare)
-
Paronychia sanchez-vegae (Caryophyllaceae), a new woody species of Paronychia from North Peru
- 2018
-
Ingår i: Phytotaxa. - : MAGNOLIA PRESS. - 1179-3155 .- 1179-3163. ; 334:1, s. 41-48
-
Tidskriftsartikel (refereegranskat)abstract
- As part of botanical expeditions in the Amazonas region of North Peru, we found plants from the Central Andes (North Peru). Based on morphology and molecular data, the Peruvian population was described and illustrated here as a new species for Science, named Paronychia sanchez-vegae. The new species is compared with its most likely closest relative, P. andina from which differs by the larger size, its woody ramified stems, the glabrous leaf surface, shorter leaf size, shorter flowers and larger size of the ovary.
|
|
| 41. |
- Munzinger, Jérôme, et al.
(författare)
-
Pycnandra longiflora (Sapotaceae) a species believed to be extinct, rediscovered in New Caledonia
- 2016
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 278:2, s. 176-180
-
Tidskriftsartikel (refereegranskat)abstract
- Pycnandra longiflora (Sapotaceae) belongs to the largest endemic genus in New Caledonia. It is only known from the type collection made in 1861–67 at the obscure locality “Gatope”. Relocation of this species has been of high priority for more than a decade, but without success. Pycnandra longiflora was therefore recently declared extinct. However, a population was recently discovered near a mining site at Onajiele, in the Ouazangou-Taom massif, and it is revealed that P. longiflora has the most spectacular flowers in the entire genus, being large and bicoloured in red and yellow. A thorough description is here outlined and we propose a preliminary IUCN status as Critically Endangered.
|
|
| 42. |
- Nordin, Anders
(författare)
-
New synonyms and lectotypes in Aspicilia (Megasporaceae, Ascomycota)
- 2015
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 192:3, s. 197-200
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The genus Aspicilia A.Massal. s.l. (Megasporaceae Pertusariales Ascomycota) has a worldwide distribution and the species are common components in the lichen vegetation on exposed rocks in a wide variety of biomes from hot deserts to Arctic tundras. The genus has a reputation of being taxonomically extremely complicated, which is partly caused by the extreme morphological variation and phenotypic plasticity of the species (Nordin 2013; Nordin et al. 2007, 2008, 2010; Owe-Larsson et al. 2008, 2011; Roux et al. 2011). The only existing taxonomic treatment of the genus with a wide scope was published by Magnusson (1939), who applied very narrow species circumscriptions in most cases. Here a number of new synonyms are presented and discussed, most of which are names introduced by Magnusson (loc. cit.), and lectotypes of Lecanora griseopallida and Sagedia laevata are designated.
|
|
| 43. |
- Ollgaard, B., et al.
(författare)
-
The Lycopodiaceae of Panama
- 2021
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 526:1, s. 1-66
-
Tidskriftsartikel (refereegranskat)abstract
- The present paper provides keys to the genera and species of Lycopodiaceae for 6 genera and 40 species recorded from Panama. The treatment includes nomenclature, descriptions of species and information about distribution and habitats, and notes on problems of species delimitation and infraspecific variation. All species are illustrated, and representative specimens are cited.
|
|
| 44. |
- Pailler, Thierry, et al.
(författare)
-
Taxonomic revision of Jumellea (Orchidaceae, Angraecinae) in the Mascarenes
- 2020
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3163 .- 1179-3155. ; 477:1, s. 1-34
-
Tidskriftsartikel (refereegranskat)abstract
- We present a taxonomic revision of the genus Jumellea (Angraecinae; Orchidaceae) in the Mascarenes based on morphological study and field observations. We examined 328 specimens mostly from the MAU, P and REU, and recognise nine species. We provide a key, morphological descriptions, distributions, habitats, phenologies and conservation assessments following the Red List categories and criteria (IUCN). All nine species are present on Réunion with two being endemic there, and five have been confirmed on Mauritius, none of them endemic. The single species recorded for Rodrigues is also the only one found on all three islands of the Mascarenes and Madagascar. Five species are endemic to the Mascarene Archipelago, whereas the other four also occur in Madagascar. All nine species qualify as threatened with extinction on at least one of the islands of the Mascarenes. Two species are probably extinct on one island, and only two species on Réunion are not threatened.
|
|
| 45. |
- Paukov, Alexander, et al.
(författare)
-
Lectotypification and synonymization of some Aspicilia species (Megasporaceae, Ascomycota) described by A. Hue from Korea and Japan
- 2017
-
Ingår i: Phytotaxa. - : MAGNOLIA PRESS. - 1179-3155 .- 1179-3163. ; 291:1, s. 94-98
-
Tidskriftsartikel (refereegranskat)abstract
- In his pioneering work on the genus Aspicilia, Hue (1910) described among others 23 species on a basis of specimens collected by Urbain Jean (Abbé) Faurie in Korea and Japan in 1899–1906. Hue provided his descriptions with carefully made characteristics of thalli as well as measurements of spores and conidia. However Hue’s systematic arrangement of species, which used only anatomical characteristics such as branching of cortical hyphae, form of cells in paraphyses and presence or absence of lateral cortex, gained criticism from Magnusson (1939) for neglecting morphology. Nevertheless, both Hue and Magnusson used very narrow species concept in Aspicilia s.l. (Nordin 2015). Moreover, some species were described on a basis of a single collection and are only known from the type locality. Therefore, critical assessment of Aspicilia species described that time is necessary.
|
|
| 46. |
|
|
| 47. |
- Persson, Claes, 1960, et al.
(författare)
-
A striking new species of Amaioua (Gardenieae-Rubiaceae) from the Colombian Andes.
- 2015
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 213:1, s. 65-68
-
Tidskriftsartikel (refereegranskat)abstract
- A new species of Amaioua, A. macrosepala, is described and illustrated. It is found at 1700–2080 m elevation in the Cor- dillera Central of the Colombian Andes. This new species is easily distinguished from all other species of Amaioua by its persistent, foliose calyx lobes.
|
|
| 48. |
- Persson, Claes, 1960, et al.
(författare)
-
Three new species of Valeriana (Valerianoideae, Caprifoliaceae) from southern Ecuador
- 2023
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 579:1, s. 47-53
-
Tidskriftsartikel (refereegranskat)abstract
- Three new species of Valeriana from southern Ecuador are described and illustrated. Valeriana plateadensis is found near the highest peak of Cerro Plateado in Cordillera del Cóndor at 2900 m a.s.l. and is recognized by the shrubby habit and sessile, densely imbricate, spatulate leaves and 3-lobed corollas. V. yacuriensis is found near Lagunas Negras de Jimbura in the Parque Nacional Yacurí at 3500 m a.s.l. and is recognized by the shrubby habit, petiolate leaves and 3-lobed corollas. V. xenophylloides is found in the Páramo de Patococha at 3400 m a.s.l. and is recognized by its cushion growth form, the crown of trichomes at the leaf apex and 3-lobed corollas.
|
|
| 49. |
- Phaliso, Ntombifikile, et al.
(författare)
-
Reassessing taxonomic relationships in the Berkheya clade (Asteraceae, Arctotideae-Gorteriinae) : the utility of achene morphology
- 2016
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 246:1, s. 1-22
-
Tidskriftsartikel (refereegranskat)abstract
- The genus Berkheya is paraphyletic with the related genera Cullumia, Cuspidia, Didelta and Heterorhachis embedded within a broader clade termed the 'Berkheya clade'. As a contribution towards reassessment of species relationships and delimitation of species groupings within the clade, the utility of external achene morphology for supporting natural species groups within the clade was evaluated. Achenes from 67 species and 10 infraspecific taxa were examined, including representatives of each genus currently recognised in the Berkheya clade. Achene pubescence and pappus characteristics (e.g., scale shape and number of scales within a series) were indicated to be particularly variable and thus less reliable for assessment of species relationships. Of the currently recognised genera, only segregation of Cullumia was supported by achene and pappus characteristics. Species groupings implicit in Roessler's infrageneric classification of eight series within Berkheya were to a large extent supported. However, in particular, series Speciosae was indicated to be a disparate species grouping and the distinction of series Angustae and Cruciatae is not supported by achene and pappus morphology. Achene and pappus characteristics suggest several novel species groupings (e.g. an affinity between Berkheya cuneata, B. ferox and B. spinosa). Although the taxonomic sampling in published molecular phylogenetic analyses is limited, achene and pappus morphology partially supports clades resolved in prevailing phylogenetic reconstructions for the clade. More complete sampling in future molecular phylogenetic analyses is required to test novel species affinities suggested in the present study and to explore the evolution of the achene and pappus in the Berkheya clade.
|
|
| 50. |
- Pirani, A., et al.
(författare)
-
Systematic significance of seed morphology in Acanthophyllum (Caryophyllaceae: tribe Caryophylleae) in Iran
- 2019
-
Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 387:2, s. 105-118
-
Tidskriftsartikel (refereegranskat)abstract
- Acanthophyllum, with ca. 90 spiny cushion-forming species, is one of the largest genera of Caryophyllaceae. Although taxonomic utility of seed morphology has already been highlighted in different genera of Caryophyllaceae, the systematic value of seed characters in Acanthophyllum has not been adequately addressed. In order to evaluate the application of seed morphology in infrageneric classification of Acanthophyllum, we surveyed seed characters in the five Iranian sections of Acanthophyllum. Seed morphology of 32 accessions of Acanthophyllum representing 21 species and four sections were investigated using scanning electron microscopy. Seed morphological characters of two species from one additional section were included based on previous studies in the Caryophyllaceae. Seeds in the majority of examined species are oblong in outline. Five types of seed surface can be considered: reticulate, reticulate-papillate, colliculate, colliculate-papillate, and colliculate-columellate. Papillae type is a reliable character for separation of certain natural groups within Acanthophyllum. Seed features provided strong evidences for separating sections, especially the following ones: Acanthophyllum, Macrostegia and Pleiosperma, whose seeds showed a high degree of uniformity among the sampled species. Morphological characteristics of seeds were less useful for discriminating Acanthophyllum species. While seed characters are consistent within individual populations, they can vary among different populations of an individual species. Our results show that variation in seed morphological characters are in agreement with phylogenetic patterns within Acanthophyllum.
|
|
