| 1. |
- Borda, E., et al.
(author)
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Cryptic species of Archinome (Annelida: Amphinomida) from vents and seeps
- 2013
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In: Proceedings of the Royal Society B-Biological Sciences. - : The Royal Society. - 0962-8452 .- 1471-2954. ; 280:1770
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Journal article (peer-reviewed)abstract
- Since its description from the Galapagos Rift in the mid-1980s, Archinome rosacea has been recorded at hydrothermal vents in the Pacific, Atlantic and Indian Oceans. Only recently was a second species described from the Pacific Antarctic Ridge. We inferred the identities and evolutionary relationships of Archinome representatives sampled from across the hydrothermal vent range of the genus, which is now extended to cold methane seeps. Species delimitation using mitochondrial cytochrome c oxidase subunit I (COI) recovered up to six lineages, whereas concatenated datasets (COI, 16S, 28S and ITS1) supported only four or five of these as clades. Morphological approaches alone were inconclusive to verify the identities of species owing to the lack of discrete diagnostic characters. We recognize five Archinome species, with three that are new to science. The new species, designated based on molecular evidence alone, include: Archinome levinae n. sp., which occurs at both vents and seeps in the east Pacific, Archinome tethyana n. sp., which inhabits Atlantic vents and Archinome jasoni n. sp., also present in the Atlantic, and whose distribution extends to the Indian and southwest Pacific Oceans. Biogeographic connections between vents and seeps are highlighted, as are potential evolutionary links among populations from vent fields located in the east Pacific and Atlantic Oceans, and Atlantic and Indian Oceans; the latter presented for the first time.
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| 2. |
- Martin, D., et al.
(author)
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The symbiotic hesionid Parasyllidea humesi Pettibone, 1961 (Annelida: Polychaeta) hosted by Scrobicularia plana (da Costa, 1778) (Mollusca: Bivalvia: Semelidade) in European waters
- 2012
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In: Organisms Diversity & Evolution. - : Springer Science and Business Media LLC. - 1439-6092 .- 1618-1077. ; 12:2, s. 145-153
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Journal article (peer-reviewed)abstract
- Heretofore, the hesionid polychaete Parasyllidea humesi was only known from its original description, living in association with the bivalve Tellina nymphalis in mangrove swamps north of Pointe-Noire (Republic of Congo, West Africa). The discovery of a stable population in Rio San Pedro (Gulf of Cadiz, southern Atlantic coast of Iberian Peninsula) thus represents the second report for this species worldwide, and the first for European waters. Furthermore, the new population is associated with another bivalve, Scrobicularia plana. The host-symbiont relationship is characterized by a high host-specificity (the symbiont was absent from Ruditapes decussatus and Cerastoderma glaucum collected in the same habitat and location), regular distribution (one, exceptionally two symbionts per host and then being male and female), and prevalence ranging from 0.22 % (in Cao Sancti Petri) to 4.74 % (Rio San Pedro). The symbionts seem to affect the metabolism of their hosts and, thus, their normal growth, so this association may tentatively be considered as close to parasitism. Parasyllidea humesi seems to be restricted to salt marsh areas with stable marine salinities all over the year. As there is no evidence that the presence of P. humesi in the Gulf of Cadiz results from an introduction, we strongly suggest that it may be better considered as native to the region, with our finding representing the northernmost known geographical limit of its distribution.
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| 3. |
- Norlinder, Erika, 1977, et al.
(author)
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Phylogeny of scale-worms (Aphroditiformia, Annelida), assessed from 18SrRNA, 28SrRNA, 16SrRNA, mitochondrial cytochrome c oxidase subunit I (COI), and morphology
- 2012
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In: Molecular Phylogenetics and Evolution. - : Elsevier BV. - 1055-7903. ; 65:2, s. 490-500
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Journal article (peer-reviewed)abstract
- The phylogeny of scale-worms, benthic polychaetes carrying dorsal scales (elytra), including taxa from Acoetidae, Aphroditidae, Eulepethidae, Pholoidae, Pholoididae, Polynoidae and Sigalionidae (Aphroditiformia), is assessed from the nuclear markers 18SrRNA and 28SrRNA, and mitochondrial 16SrRNA and cytochrome c oxidase subunit I (COI), and 24 morphological characters. The data sets are analyzed both separately and combined, with Bayesian analyses, maximum likelihood and parsimony. In total, 56 terminal taxa are examined, including 48 taxa from all scale-worm families, and eight out-group species. The results indicate that Aphroditidae and Eulepethidae are the most basally placed families among the scale-worms. The Pholoididae and Pisionidae are positioned within and synonymized with the Sigalionidae, and Pholoidae may be part of the same group. The subfamily Iphioninae falls out as sister group to a clade consisting of Polynoidae and Acoetidae and is elevated to Iphionidae. The families now included in the Aphroditiformia are Acoetidae, Aphroditidae, Eulepethidae, Pholoidae, Polynoidae, Iphionidae and Sigalionidae, and the subfamily name Harmothoinae and Acholoinae are treated as a junior synonyms of Polynoinae. (C) 2012 Published by Elsevier Inc.
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| 4. |
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| 5. |
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| 6. |
- Nygren, Arne, 1971, et al.
(author)
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Colour polymorphism in the polychaete Harmothoe imbricata (Linnaeus, 1767)
- 2011
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In: Marine Biology Research. - 1745-1000. ; 7:1, s. 54-62
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Journal article (peer-reviewed)abstract
- We investigated whether the different colour morphs in Harmothoe imbricata constitute a single polymorphic species or if there are several species present. We sequenced the mitochondrial COI and the nuclear ITS1–5.8SrDNA–ITS2 region from 57 specimens representing 10 distinct colour morphs collected from Svalbard to the Swedish west coast. The resulting minimum spanning haplotype network based on mitochondrial COI unequivocally shows H. imbricata to be a single and colour polymorphic species, whereas variation in the ITS region was very limited.
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| 7. |
- Nygren, Arne, 1971, et al.
(author)
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Cryptic species of Notophyllum (Polychaeta: Phyllodocidae) in Scandinavian waters
- 2010
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In: Organisms Diversity & Evolution. - : Springer Science and Business Media LLC. - 1439-6092 .- 1618-1077. ; 10:3, s. 193-204
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Journal article (peer-reviewed)abstract
- The phyllodocid polychaete Notophyllum foliosum occurs in two colour morphs in Swedish and Norwegian waters, one palish yellow to grey form with black patches that is restricted to deeper waters and often associated with reefs of the deep-water coral Lophelia pertusa, and one usually yellow-orange form with black patches and white spots that is usually encountered on more shallow bottoms. We have sampled the two forms from sympatric occurrences in Norway, and the shallow form from the Swedish west coast. Phylogenetic and haplotype analyses based on the mitochondrial cytochrome c oxidase subunit I (COI) gene and the nuclear internal transcribed spacer region (ITS1-5.8SrDNA-ITS2) unequivocally indicate that the two forms represent different species. We apply the name N. foliosum (Sars, 1835) to the 'shallow form', and propose N. crypticum n. sp. for the 'deep form'. A lectotype is fixed for N. foliosum.
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| 8. |
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| 9. |
- Nygren, Arne, 1971, et al.
(author)
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Redescription of Imajimaea draculai-a rare syllid polychaete associated with the sea pen Funiculina quadrangularis
- 2010
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In: Journal of the Marine Biological Association of the United Kingdom. - 0025-3154. ; 90:7, s. 1441-1448
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Journal article (peer-reviewed)abstract
- We redescribe Imajimaea draculai based on newly collected specimens from the Swedish west coast and describe for the first time its association with the sea pen Funiculina quadrangularis. We assess the phylogenetic position of I. draculai within Autolytinae using nuclear 18SrDNA, together with mitochondrial COI and 16SrDNA, and we estimate its intraspecific variation using nuclear ITS and mitochondrial COI. Our molecular data unequivocally show that I. draculai belongs to the tribe Procerini in a clade consisting of Procerastea, Virchowia and Imajimaea that is separated from all other Procerini taxa for which molecular data are available. No intraspecific variation is found in I. draculai for the sequenced molecular markers.
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| 10. |
- Nygren, Arne, 1971, et al.
(author)
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Two new and two poorly known autolytines (Polychaeta: Syllidae) from Madeira and the Mediterranean Sea
- 2010
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In: Zootaxa. - 1175-5326. ; :2640, s. 35-52
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Journal article (peer-reviewed)abstract
- We describe Proceraea albocephala, new species, from Madeira, and Erseia oligochaeta, new genus and new species, from Istria, Croatia, and we provide redescriptions of Proceraea madeirensis (Nygren, 2004) from topotype material, and Myrianida longoprimicirrata (Lopez, San Martin & Jimenez, 1997) from material collected at Istria, Croatia, and Banyuls-sur-Mer, France. Proceraea albocephala, new species is morphologically separated from similar species by a prostomial white spot, and E. oligochaeta, new genus, new species is unique in having only a few (1-2) simple unidentate chaetae in all chaetigers, and a trepan with a single large and 25-28 smaller teeth. We assess the phylogenetic positions of the four species using nuclear 18SrDNA, together with mitochondrial COI and 16SrDNA. Our molecular data show that among the sequenced autolytines 1) P. albocephala, new species is most closely related to P. nigropunctata Nygren & Gidholm, 2001, P. okadai (Imajima, 1966), and P. cornuta (Agassiz, 1862), 2) E. oligochaeta, new genus, new species belongs within a clade together with Procerastea nematodes Langerhans, 1884, Virchowia clavata Langerhans, 1879, and Imajimaea draculai (San Martin & Lopez, 2002), 3) M. longoprimicirrata is sister species to M. pentadentata (Imajima, 1966), and 4) P. madeirensis has a basal position within Procerini. The molecular data suggests that Proceraea Ehlers, 1864 as currently delineated is paraphyletic.
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| 11. |
- Pleijel, Fredrik, 1955, et al.
(author)
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A partial revision of Gyptis (Gyptini, Ophiodrominae, Hesionidae, Aciculata, Annelida), with descriptions of a new tribe, a new genus and five new species
- 2012
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In: Zoological Journal of the Linnean Society. - : Oxford University Press (OUP). - 0024-4082. ; 165:3, s. 471-494
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Journal article (peer-reviewed)abstract
- Phylogenetic analyses of molecular data (COI, 16SrDNA, 18SrDNA, and 28SrDNA) show that the hesionid genus Gyptis Marion & Bobretzky in Marion, 1874, and the tribe Gyptini Pleijel, 1998, are nonmonophyletic as currently delineated. We introduce the new tribe Amphidurini and the new genus Neogyptis to accommodate these new findings. Amphidurini is sister to Gyptini and Ophiodromini and includes Amphiduros Hartman, 1959, Amphiduropsis, Pleijel, 2001, Neogyptis gen. nov., and, possibly, Parahesione Pettibone, 1956. Morphologically, Amphidurini can be separated from Gyptini by the distally, rather than subdistally, inserted ventral cirri, and Neogyptis by the combination of this feature, the presence of a median antenna, and a distal ring with papillae on the proboscis. We redescribe and transfer the four species Gyptis crypta Pleijel, 1993, Gyptis mediterranea Pleijel, 1993, Gyptis plurisetis Hilbig, 1992, and Gyptis rosea (Malm, 1874) from Gyptis to Neogyptis gen. nov., and describe five new species from shallow waters in Belize, Hong Kong, off Vladivostok, and deep-sea hydrothermal vents in the Lau Basin off Fiji.
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| 12. |
- Pleijel, Fredrik, 1955, et al.
(author)
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A revision of Nereimyra (Psamathini, Hesionidae, Aciculata, Annelida)
- 2012
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In: Zoological Journal of the Linnean Society. - : Oxford University Press (OUP). - 0024-4082. ; 164:1, s. 36-51
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Journal article (peer-reviewed)abstract
- Nereimyra Blainville, 1828 (Psamathini, Hesionidae, Aciculata, Annelida) is revised based on examination of all available types and newly collected specimens. We assessed the phylogeny of Nereimyra in an analysis based on cytochrome oxidase c subunit I (COI), 16S rDNA, 18S rDNA, and 28S rDNA. The genus is delineated to include the three species Nereimyra aphroditoides (Fabricius, 1780), Nereimyra punctata (O.F. Muller, 1776), and Nereimyra woodsholea (Hartman, 1965), which are redescribed. Nereimyra punctata has a characteristic pigmentation, but otherwise there are no clear morphological characters for separating the species. Based on the molecular data we obtained strong support both for the monophyly of Nereimyra and for each of the three included species. Nereimyra punctata and N. woodsholea are sister species, and the Kimura two-parameter (K2P)-corrected COI distances between the three species are 1623%. Syllidia Quatrefages, 1866, is sister group to Nereimyra. Previous uncertainties regarding the type species of the genus are settled to Nereis rosea Fabricius, 1780, junior synonym of N. aphroditoides. A neotype is designated for N. aphroditoides. The distribution of Nereimyra is at present restricted to the Arctic and the boreal parts of the North Atlantic, possibly extending to the Gulf of Mexico on the United States east coast. Records outside this area require verification. Castalia multipapillata Theel, 1879, and Nereimyra alvinae Blake, 1985, are of uncertain affinity and are treated as nomina dubia.
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| 13. |
- Pleijel, Fredrik, 1955, et al.
(author)
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Chambered chaetae in nereidiform polychaetes (Annelida)
- 2010
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In: Zoomorphology. - : Springer Science and Business Media LLC. - 0720-213X .- 1432-234X. ; 129:2, s. 93-98
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Journal article (peer-reviewed)abstract
- The nereidiform polychaete taxa Chrysopetalidae, Hesionidae and Nereididae are characterized by the presence of chambered chaetae. The medullae (inner part) of all examined annelid chaetae are provided with internal longitudinal canals, but in these taxa there are additional thin, transverse walls (diaphragms), giving the chaetae a barred or chambered appearance in light microscopy. We investigate this structure in chrysopetalids, hesionids, nereidids, with light, scanning and transmission electron microscopy and compare it to phyllodocids and syllids, which are outside this clade. We conclude that chambered chaetae likely constitute an synapomorphy for chrysopetalids, hesionids and nereidids, although further study are required of some aphroditids and nephtyids.
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| 14. |
- Pleijel, Fredrik, 1955, et al.
(author)
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New and lesser known species of Chrysopetalidae, Phyllodocidae and Syllidae from south California (Phyllodocida, Aciculata, Annelida)
- 2012
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In: Zootaxa. - 1175-5326. ; :3506, s. 1-25
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Journal article (peer-reviewed)abstract
- Two species are described from shallow waters in La Jolla in southern California, the chrysopetalid Dysponetus populonectens, new species, and the phyllodocid Pterocirrus burtoni, new species. The syllid Brachysyllis lagunae (Hartman, 1961), new combination (previously in Dioplosyllis), and the phyllodocids Eulalia aviculiseta Hartman, 1936, Eulalia gracilior (Chamberlin, 1919), new combination (previously in Steggoa), Pterocirrus montereyensis (Hartman, 1936), and Eumida longicornuta (Moore, 1906) are redescribed from types and newly collected specimens. Sige californiensis Chamberlin, 1919 is treated as a nomen dubium. COI sequences are provided for all included species.
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| 15. |
- Ravara, A., et al.
(author)
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Nephtyidae (Annelida, Polychaeta) from southern Europe
- 2010
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In: Zootaxa. - 1175-5326. ; :2682, s. 1-68
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Journal article (peer-reviewed)abstract
- Eighteen nephtyid species belonging to four different genera are known from southern Europe. In this study we revise the nephtyids from this area and provide descriptions of all the known species. Geographical and bathymetrical distributions are given, together with ecological notes. Inermonephtys foretmontardoi, new species, is described, Micronephthys maryae is newly synonymized with M. stammeri and Aglaophamus rubellus with A. agilis. New diagnoses are provided for southern European genera and a key to all species from the region is included.
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| 16. |
- Ravara, A., et al.
(author)
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Phylogenetic relationships within Nephtyidae (Polychaeta, Annelida)
- 2010
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In: Zoologica Scripta. - : Wiley. - 0300-3256 .- 1463-6409. ; 39:4, s. 394-405
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Journal article (peer-reviewed)abstract
- We present the first phylogeny of nephtyids, a common, soft-bottom living polychaete family comprising five genera and over 100 species. Characters used to distinguish nephtyid genera are a matter of controversy and considerable confusion remains as to the generic delineations. The phylogeny is estimated with molecular data from the mitochondrial genes cytochrome oxidase I and 16S rDNA, the nuclear genes 18S rDNA and 28S rDNA and morphological data. The results reveal two well-supported major clades, corresponding in part to the two main genera of the family, Aglaophamus and Nephtys. The species Nephtys pulchra and Nephtys australiensis are transferred to Aglaophamus, and new diagnoses for the genera are provided. Dentinephtys is synonymized with Nephtys, and Nephtys cornuta is sister to the remaining nephtyids and is referred to the new genus Bipalponephtys, together with Nephtys danida and Micronephthys neotena. Micronephthys is sister to Nephtys and Inermonephtys is of uncertain position.
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| 17. |
- Schander, C, 1960, et al.
(author)
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The fauna of hydrothermal vents on the Mohn Ridge (North Atlantic)
- 2010
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In: Marine Biology Research. - 1745-1000. ; 6:2, s. 155-171
-
Journal article (peer-reviewed)abstract
- The macrofauna of the newly discovered hydrothermal vent field on the Mohn Ridge at 71 degrees N was investigated. Samples were collected during the cruise BIODEEP 2006 using the ROV 'Bathysaurus'. A total of 180 species-level taxa were identified. The region contains very few vent-endemic species, but some species of Porifera, Crustacea and Mollusca may be vent-associated. Dense aggregations of motile non-vent species such as Heliometra glacialis and Gorgonocephalus eucnemis surrounded the vent area, but the area in general only held small numbers of sedentary animals. Calcareous sponges comprised an unusually high portion of the sponge species found and they constitute one of the first pioneers among the sessile invertebrates settling on these vents. Possible explanations for the structure of the fauna in the region are discussed.
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| 18. |
- Stiller, J., et al.
(author)
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Phylogeny, biogeography and systematics of hydrothermal vent and methane seep Amphisamytha (Ampharetidae, Annelida), with descriptions of three new species
- 2013
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In: Systematics and Biodiversity. - : Informa UK Limited. - 1477-2000 .- 1478-0933. ; 11:1, s. 35-65
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Journal article (peer-reviewed)abstract
- Amphisamytha has five currently recognized species. One of these, A. galapagensis has been reported from numerous hydrothermal vents and methane seeps across the Pacific Ocean. Here, a collection of Amphisamytha from a range of Pacific habitats, as well as Amathys lutzi from Atlantic hydrothermal vents, were studied using morphology and DNA sequences from mitochondrial (COI and 16S rRNA) and nuclear (18S rRNA) genes. Phylogenetic analyses revealed a deep-sea clade comprised of the previously recognized Amphisamytha species, and three lineages that are treated as new species. The morphologically distinct Amathys lutzi was nested within Amphisamytha and the monotypic Amathys is treated as a junior synonym of Amphisamytha, with a resulting name change to Amphisamytha lutzi comb. nov. A revision of the other Amphisamytha species, the description of three new species, and a key are provided. The geographic range of the ‘cosmopolitan’ A. galapagensis is restricted to hydrothermal vents of the East Pacific Rise and the Galápagos Ridge. Amphisamytha fauchaldi, previously only known from sedimented hydrothermal vents of the Guaymas Basin (Gulf of California, Mexico), is recorded from cold seeps off the coasts of Costa Rica and Oregon. Amphisamytha carldarei sp. nov. is described from hydrothermal vents of the northeast Pacific (Juan de Fuca), while A. jacksoni sp. nov. spans much of the East Pacific Rise and is sympatric with A. galapagensis for part of its range. Amphisamytha julianeae sp. nov. is found at western Pacific vent systems in sympatry with A. vanuatuensis. Relaxed molecular clock analyses were calibrated using the vicariant event involving the Farallon-Pacific Ridge in the northern Pacific Ocean. This provides mean dates for the origin of the deep-sea Amphisamytha clade at 44 or 55 million years ago, and the separation of the Pacific–Atlantic sister-species pair at 13 or 21 million years ago, depending on the tree used.
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