Topic
Stemonitopsis
About: Stemonitopsis is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 10 citations.
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TL;DR: This study provides a first insight into the genetic diversity of Stemonitis and allied genera, and proposes spore ornamentation as an evolutionary informative feature to distinguish genera in this group.
Abstract: About a thousand described species of Myxomycetes, colloquially named slime moulds, are present in most terrestrial habitats. Molecular environmental sampling has revealed that a significant proportion of sequences could not be assigned to known species, with some specific groups showing a high hidden diversity. One such group included Stemonitis and allied genera, with only a few closely related reference sequences from known species and many distantly related sequences from environmental sampling. To improve the phylogeny and help define genera in this lineage, we provided nine new small-subunit ribosomal RNA gene sequences of Stemonitis and allied genera, along with microscopy observations. We showed that the genus Stemonitis is polyphyletic, clearly separated into two groups, with the main distinguishing feature being spore ornamentation. The first group included the type species Stemonitis fusca, and was characterized by reticulated spores, while the second contained species with warted spores (e.g. S. flavogenita and S. axifera) and many undetermined environmental sequences. In addition, we show that the related genera Stemonitopsis, Stemonaria and Symphytocarpus were polyphyletic and that their circumscription was based on inconsistent characteristics. Instead, representatives of these genera clustered into the two clades according to their spore ornamentation. Our study provides a first insight into the genetic diversity of Stemonitis and allied genera, and proposes spore ornamentation as an evolutionary informative feature to distinguish genera in this group.
7 citations
TL;DR: It was concluded that interspecies variation of the ITS1-5.8SrDNA-ITS2 region is high enough to differentiate species, but this region did not reflect the evolutionary relationships between the myxomycetes species.
Abstract: Seven different PCR primers targeting 18 different myxomycetes genera were designed and ribosomal DNA ITS1-5.8SrDNA-ITS2 regions of 52 morphologically characterized species from Turkey were amplified and sequenced. The studied species belong to the genera Arcyria, Badhamia, Ceratiomyxa, Collaria, Comatricha, Cribraria, Diachea, Diderma, Didymium, Enerthenema, Lamproderma, Lycogala, Perichaena, Physarum, Reticularia, Stemonitis, Stemonitopsis, and Trichia. Significant ITS region size and sequence variations were observed among the analyzed species. The ITS based phylogenetic tree did not reflect evolutionary relationships at genus or higher level. The only exception was the genus Didymium, which formed a clearly distinctive cluster in the phylogenetic tree containing 18 different genera. It was concluded that interspecies variation of the ITS1-5.8S-ITS2 region is high enough to differentiate species, but this region did not reflect the evolutionary relationships between the myxomycetes species. Hence, we suggested that sequencing of the ITS region could only be used as a supporting tool for the phenotypic identification, not for revealing the evolutionary relationships between the myxomycetes species.
6 citations
01 Jan 2010
TL;DR: Thirty six species and one variety of myxomycetes are reported from Qinghai Province,China and Diderma roanense is new to China and it was briefly described and discussed.
Abstract: Thirty six species and one variety of myxomycetes are reported from Qinghai Province,China.Diderma roanense is new to China and it was briefly described and discussed.Nineteen species are new to Qinghai,including Cribraria ferruginea,Cribraria oregana,Dictydium cancellatum,Dictydiaethalium plumbeum,Tubifera ferruginosa,Calomyxa metallica,Trichia persimilis,Trichia varia,Badhamia foliicola,Craterium leucocephalum,Diderma radiatum,Didymium minus,Fuligo septica,Physarum tenerum,Physarum viride,Comatricha laxa,Stemonaria longa,Stemonitis fusca and Stemonitopsis typhina.The results supplement the data for diversity of myxomycete species distributing in Qinghai-Tibet Plateau as well as high-altitude mountains of China.
2 citations
TL;DR: Both Light- and Scanning Electron Microscopy are aplied to re-assess diagnostic characters of type specimens for selected Stemonitales kept in the collections of the Natural History Museum London (BM).
Abstract: For the first time both Light- and Scanning Electron Microscopy are aplied to re-assess diagnostic characters of type specimens for selected Stemonitales kept in the collections of the Natural History Museum London (BM). The results are used to revise published data and the type status is discussed for specimens of Amaurochaete comata G. Lister & Brândza, Comatricha longipila Nann.-Bremek., Comatricha lurida Lister, Comatricha pulchella (C. Bab.) Rostaf., Comatricha suksdorfii Ellis & Everh., Paradiacheopsis rigida (Brândza) Nann.-Bremek., Stemonaria irregularis (Rex) Nann.-Bremek., R. Sharma & Y. Yamam. and Stemonitopsis microspora (Lister) Nann.-Bremek at BM. A lectotype is proposed for Paradiacheopsis rigida (Brândza) Nann.-Bremek.
1 citations