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Biodiversity of Ascomycota fungi in Serbia is still scarcely known although
mostly phytopathogenic literature data can be found from the last decade, including
previous checklists for classes Leotiomycetes and Pezizomycetes. This paper
presents data on the new findings of fungal species of the classes Leotiomycetes
and Pezizomycetes in Serbia, foun...
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Citations
The chalara-like anamorphs of Leotiomycetes are phialidic hyphomycetes with cylindrical collarettes and deeply seated sporulating loci, and hyaline, aseptate or septate, cylindrical conidia. They are commonly found on plant litters in both terrestrial and submerged environments, and with broad geographical distribution. This paper reports our research result of diversity, taxonomy and phylogeny of these fungi in China, which is based on a systematic study by using an integrated approach of literature study, morphological observation and phylogenetic analyses of 153 chalara-like fungal species with diversified morphology in conidiomata, setae, conidiophores, phialides and conidia. The phylogenetic analyses employing different datasets of SSU, LSU and ITS sequences of 116 species showed that these chalara-like fungi were paraphyletic and scattered in 20 accepted genera belonging to five families of Leotiomycetes: Arachnopezizaceae, Hamatocanthoscyphaceae, Helotiaceae, Neolauriomycetaceae and Pezizellaceae. Additional six genera, Ascoconidium , Bioscypha , Chalarodendron , Didonia , Phaeoscypha and Tapesina , all reported with chalara-like anamorphs in literatures, are also accepted as members of Pezizellaceae or Leotiomycetes genera incertae sedis. Among of these 26 accepted genera of chalara-like fungi in Leotiomycetes, 17 genera are asexually typified genera ( Ascoconidium , Bloxamia , Chalara , Chalarodendron , Constrictochalara , Cylindrochalara , Cylindrocephalum , Leochalara , Lareunionomyces , Minichalara , Neochalara , Neolauriomyces , Nagrajchalara , Parachalara , Stipitochalara , Xenochalara and Zymochalara ), and 9 are sexually typified genera ( Bioscypha , Bloxamiella , Calycellina , Calycina , Didonia , Hymenoscyphus , Mollisina , Phaeoscypha and Tapesina ). The phylogenetic significance of conidial septation in generic delimitation was further confirmed; while other morphologies such as conidiomata, setae, conidiophores, phialides, conidial length, and conidial ornamentation have little phylogenetic significance, but could be used for species delimitation. The polyphyletic genus Chalara s. lat. is revised with monophyletic generic concepts by redelimitation of Chalara s. str. in a narrow concept, adaption of the emended Calycina to also include asexually typified chalara-like fungi, reinstatement of Cylindrocephalum , and introduction of six new genera: Constrictochalara W.P. Wu & Y.Z. Diao, Leochalara W.P. Wu & Y.Z. Diao, Minichalara W.P. Wu & Y.Z. Diao, Nagrajchalara W.P. Wu & Y.Z. Diao, Parachalara W.P. Wu & Y.Z. Diao and Stipitochalara W.P. Wu & Y.Z. Diao. Chaetochalara becomes a synonym of Chalara s. str., and the known species are disassembled into Chalara s. str. and Nagrajchalara . The polyphyletic genus Bloxamia is also redefined by introducing the new genus Bloxamiella W.P. Wu & Y.Z. Diao for B . cyatheicola . Five existing species of Chalara s. lat. were excluded from Leotiomycetes and reclassified: Chalara breviclavata as Chalarosphaeria breviclavata W.P. Wu & Y.Z. Diao gen. et sp. nov. in Chaetosphaeriaceae, C . vaccinii as Sordariochalara vaccinii W.P. Wu & Y.Z. Diao gen. et sp. nov. in Lasiosphaeriaceae, and three other Chalara species with hyaline phialides, C . hyalina , C . schoenoplecti and C . siamense as combinations of Pyxidiophora in Pyxidiophoraceae. For biodiversity of these fungi in China, a total of 80 species in 12 genera, including 60 new species, 17 new records and 1 new name, were discovered and documented in this paper. In addition, five species including three new species are reported from Japan. In connection to this revision, a total of 44 new combinations are made. The identification keys are provided for most of these genera. Future research area of these fungi should be the phylogenetic relationship of several sexually typified genera such as Bioscypha , Calycellina , Calycina , Didonia , Phaeoscypha , Rodwayella and Tapesina , and systematic revision of existing names under the genera Bloxamia , Chaetochalara and Chalara .
