| 1. |
- Codjia, Jean Evans, I, et al.
(författare)
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Historical biogeography and diversification of ringless Amanita (section Vaginatae) support an African origin and suggest niche conservatism in the Americas
- 2023
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Ingår i: Molecular Phylogenetics and Evolution. - : Elsevier. - 1055-7903 .- 1095-9513. ; 178
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Tidskriftsartikel (refereegranskat)abstract
- Ectomycorrhizal fungi (ECM) sustain nutrient recycling in most terrestrial ecosystems, yet we know little about what major biogeographical events gave rise to present-day diversity and distribution patterns. Given the strict relationship between some ECM lineages and their hosts, geographically well-sampled phylogenies are central to understanding major evolutionary processes of fungal biodiversity patterns. Here, we focus on Amanita sect. Vaginatae to address global diversity and distribution patterns. Ancestral-state-reconstruction based on a 4-gene timetree with over 200 species supports an African origin between the late Paleocene and the early Eocene (ca. 56 Ma). Major biogeographic "out-of-Africa" events include multiple dispersal events to Southeast Asia (ca. 45-21 Ma), Madagascar (ca. 18 Ma), and the current Amazonian basin (ca. 45-36 Ma), the last two likely transoceanic. Later events originating in Southeast Asia involve Nearctic dispersal to North America (ca. 20-5 Ma), Oceania (Australia and New Zealand; ca. 15 Ma), and Europe (ca. 10-5 Ma). Subsequent dispersals were also inferred from Southeast Asia to East Asia (ca. 4 Ma); from North America to East Asia (ca. 11-8 Ma), Southeast Asia (ca. 19-2 Ma), Northern Andes (ca. 15 Ma), and Europe (ca. 15-2 Ma), respectively; and from the Amazon to the Caribbean region (ca. 25-20 Ma). Finally, we detected a significant increase in the net diversification rates in the branch leading to most northern temperate species in addition to higher state-dependent diversification rates in temperate lineages, consistent with previous findings. These results suggest that species of sect. Vaginatae likely have higher dispersal ability and higher adaptability to new environments, in particular compared to those of its sister clade, sect. Caesareae. Overall, the much wider distribution of A. sect. Vaginatae, from pan-tropical to pan-arctic, provides a unique window to understanding niche conservatism across a species-rich clade of ECM fungi.
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| 2. |
- Aïgnon, Hyppolite L., et al.
(författare)
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A new species of Inosperma, and first record of I. afromelliolens (Inocybaceae, Fungi) from West Africa
- 2023
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Ingår i: PLOS ONE. - : Public Library of Science (PLoS). - 1932-6203. ; 18:10
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Tidskriftsartikel (refereegranskat)abstract
- Here, we present the newly identified Inosperma macrocarpa and the first record of I. afromelliolens from West Africa. Inosperma macrocarpa is nested in an Old World Tropical clade, based on a molecular phylogeny inferred from the sequences of ITS, LSU, RPB2, and TEF1. Complete descriptions and illustrations, including photographs and line drawings, of the new species are presented. Morphological and molecular analyses based on collections from Benin confirmed the presence of I. afromelliolens in West Africa. Toxicity analysis showed that neither species contained muscarine, which further supports the hypothesis that the ability to produce muscarine is a derived trait of Inosperma.
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| 3. |
- Aignon, Hyppolite L., et al.
(författare)
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Mallocybe africana (Inocybaceae, Fungi), the first species of Mallocybe described from Africa
- 2021
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Ingår i: Phytotaxa. - : Magnolia Press. - 1179-3155 .- 1179-3163. ; 478:1, s. 49-60
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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.
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| 4. |
- Aignon, Hyppolite L., et al.
(författare)
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Three new species of Inosperma (Agaricales, Inocybaceae) from Tropical Africa
- 2021
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Ingår i: MycoKeys. - : Pensoft Publishers. - 1314-4057 .- 1314-4049. ; :77, s. 97-116
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Tidskriftsartikel (refereegranskat)abstract
- Here, we describe three new species of Inosperma from Tropical Africa: Inosperma africanum, I. bulhomarginatum and I. flavobrunneum. Morphological and molecular data show that these species have not been described before, hence need to be described as new. The phylogenetic placements of these species were inferred, based on molecular evidence from sequences of 28S and RPB2. Additional analysis using ITS dataset shows interspecific variation between each species. Phylogenetic analyses resolve I. flavobrunneum in Old World Tropical lade I with weak support, I. bulbomarginatum is sister of Old World Tropical clack 1 and I. africanum is indicated as sister to the rest of Inosperma. Complete description and illustrations, including photographs and line drawings, are presented for each species. A new combination of Inocybe shawarensis into Inosperma is also proposed.
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| 5. |
- Badou, Sylvestre A., et al.
(författare)
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Paxilloboletus gen. nov., a new lamellate bolete genus from tropical Africa
- 2022
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Ingår i: Mycological progress. - : Springer Nature. - 1617-416X .- 1861-8952. ; 21:1, s. 243-256
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Tidskriftsartikel (refereegranskat)abstract
- This study presents Paxilloboletus gen. nov., a new lamellate bolete genus represented by two tropical African species, Paxilloboletus africanus sp. nov. and Paxilloboletus latisporus sp. nov. Although the new taxa strongly resemble Paxillus (Paxillaceae), they lack clamp connections and form a separate generic clade within the Boletaceae phylogeny. The new species are lookalikes, morphologically only separable by their spore morphology. Descriptions and illustrations of the new genus and new species are given, as well as comments on ecology, distribution, and morphological differences with other gilled Boletaceae.
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| 6. |
- Badou, Sylvestre A., et al.
(författare)
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Two new African siblings of Pulveroboletus ravenelii (Boletaceae)
- 2018
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Ingår i: MycoKeys. - : Pensoft Publishers. - 1314-4057 .- 1314-4049. ; :43, s. 115-130
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Tidskriftsartikel (refereegranskat)abstract
- This paper sorts out the taxonomy of species affiliated with Pulveroboletus ravenelii in the Guineo-soudanian and Zambezian woodlands of Africa. Morphological and genetic characters of African Pulveroboletus collections were studied and compared to those of North American and Asian species. A phylogenetic analysis showed that the African specimens form a subclade, sister to the Asian and American taxa. Although clamp connections have previously never been reported from Pulveroboletus, all specimens of the African subclade show very small clamp connections. Two new African species, Pulveroboletus africanus sp. nov. and P. sokponianus sp. nov., are described and illustrated. Comments concerning morphology and identification, as well as distribution and ecology, are given for both species.
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| 7. |
- Codjia, Jean Evans, I, et al.
(författare)
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Amanita sect. Phalloideae : two interesting non-lethal species from West Africa
- 2022
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Ingår i: Mycological progress. - : Springer Nature. - 1617-416X .- 1861-8952. ; 21:3
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Tidskriftsartikel (refereegranskat)abstract
- The members of Amanita sect. Phalloideae (Fr.) Quel. are responsible for many fatalities worldwide. However, some species in this section have previously been reported as non-lethal and lacking deadly toxins. Sequences of five genes (ITS, nrLSU, RPB2, TEF1-alpha, TUB2) of species belonging to the section from tropical Africa, America, Asia, Australia, and Europe were included in this study to elucidate the phylogenetic relationships among the species. The results indicated that the lethal species are in one clade (subclade I) while the non-lethal species are divided into two clades (subclades II and III) within the section. Moreover, two non-lethal species from tropical Africa, namely A. ballerinoides and A. bulbulosa are newly described based on both morphology and molecular approaches. Phylogenetically, they cluster in the same subclade III with other known non-lethal amanitas, including A. ballerina, A. chuformis, A. franzii, A. levistriata, and A. pseudogemmata. Neither amatoxins nor phallotoxins were detected in A. ballerinoides and A. bulbulosa by LC-HRMS, which agrees with their placement in the non-lethal subclade III within A. sect. Phalloideae. Finally, a key to the West African species of Amanita sect. Phalloideae is provided.
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| 8. |
- Codjia, Jean Evans I., et al.
(författare)
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Morphology, Multilocus Phylogeny, and Toxin Analysis Reveal Amanita albolimbata, the First Lethal Amanita Species From Benin, West Africa
- 2020
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Ingår i: Frontiers in Microbiology. - : Frontiers Media SA. - 1664-302X. ; 11
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Tidskriftsartikel (refereegranskat)abstract
- Many species of Amanita sect. Phalloideae (Fr.) Quél. cause death of people after consumption around the world. Amanita albolimbata, a new species of A. sect. Phalloideae from Benin, is described here. The taxon represents the first lethal species of A. sect. Phalloideae known from Benin. Morphology and molecular phylogenetic analyses based on five genes (ITS, nrLSU, rpb2, tef1-α, and β-tubulin) revealed that A. albolimbata is a distinct species. The species is characterized by its smooth, white pileus sometimes covered by a patchy volval remnant, a bulbous stipe with a white limbate volva, broadly ellipsoid to ellipsoid, amyloid basidiospores, and abundant inflated cells in the volva. Screening for the most notorious toxins by liquid chromatography–high-resolution mass spectrometry revealed the presence of α-amanitin, β-amanitin, and phallacidin in A. albolimbata.
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| 9. |
- Furneaux, Brendan R., et al.
(författare)
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Both ectomycorrhizal tree diversity and soil characteristics structure ectomycorrhizal mushroom communities, and production in Sudanian savanna woodlands
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Ectomycorrhiza (ECM) are a symbiosis between plant and fungi where the plant get nutrients and other benefits from the fungi while the fungi get energy rich carbon compounds from the plant.Many ECM fungi form fleshy fruitbodies, including many choice edible mushrooms.Sudanian savanna woodlands are a tropical ecosystem that has a large proportion of ECM trees, but is under severe threat due to human activities.Based on three mushroom seasons of biweekly frutingbody collection we analyze the environmental factors driving the structure of the ECM community, including: composition, diversity, richness and biomass production.As wild edible mushrooms are an important food supplement in the region, we also analyzed the community structure of local choice edibles specifically.Different types of factors have been shown to influence different systems so we consequently take a comprehensive approach to what environmental factors are investigated, including ECM tree community structure, microclimate, and soil characteristics.We find that the spatial variation in ECM fungal community structure within our study area is larger than the variation in ECM fungal community structure of the study area between years.The richness of ECM host trees influenced all aspects of the spatial community structure, with a positive effect on diversity, richness, and biomass production.Microclimate also had an affect on all aspects of the community structure, but the relative importance of soil temperature and soil moisture varied.Soil characteristics were the strongest correlates of species diversity and richness, as well as biomass production, with soil nitrogen levels found to have a negative effect while phosphorus had a positive effect.Soil characteristicss were not found to be important to species composition, but this may be due to lack of statistical power, since the sampling size was lower for these factors than the others.Despite our comprehensive measurements, most of the spatial variation was not explained by any of the included factors.This variation may be due to unmeasured environmental, individual, or population level factors.
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| 10. |
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