Tetraploa yunnanensis 2020

Tetraploa yunnanensis W. Dong, H. Yang & H. Zhang, sp. nov.2020

Index Fungorum number: IF557937; Facesoffung number: FoF09282

Holotype: CHINA, Yunnan Province, Puzhehei Wetland, 24°8ʹ32ʺN, 104°6ʹ58ʺE, on submerged wood, 12 May 2018, H. Yang, P13 (MFLU 19-0524, holotype), ex-type living culture MFLUCC 19-0319; Thailand, Chiang Mai Province, on submerged wood, 9 February 2018, G.N. Wang, A66 (MFLU 18-0959), living culture MFLUCC 18-0652.

Morphological description 

Saprobic on submerged wood. Sexual morph: Undetermined. Asexual morph: Mycelium superficial. Conidiophores absent. Conidiogenous cells monoblastic. Conidia 30–50 × 16–22 μm ( ^x̄ = 43 × 19 μm, n = 10), solitary, short to long cylindrical, brown to dark brown, verrucose, consisting of 2–3 columns of 7.5–10 µm wide, 4–6-celled, with 1–3 appendages. Appendages 25–83 µm long, 4–5.5 µm wide at the base, 1.5–2.5 µm wide at the apex, 1–5-septate, brown, smooth, unbranched, straight.Cultural characteristics: Conidia germinated on PDA within 24 hours. Colonies on PDA reaching 20–25 mm 

Habitat: submerged wood

Distribution: CHINA, 

GenBank Accession: 

Notes: Tetraploa yunnanensis clusters with a strain of T. sasicola (NCYUCC 19-0371) with high bootstrap support (Fig. 110). Tetraploa sasicola NCYUCC 19-0371 (MFLU 19-2698) is an ascomycetous species characterized by hyaline to yellowish brown ascospores without appendages (Hyde et al. 2020b). Although asexual morph of NCYUCC 19-0371 was not formed in culture (Hyde et al. 2020b), phylogeny clearly separates them as distinct species (Fig. 110).

Reference: Freshwater Dothideomycetes are a highly diverse group of fungi, which are mostly saprobic in freshwater habitats worldwide. They are important decomposers of submerged woody debris and leaves in water. In this paper, we outline the genera of freshwater Dothideomycetes with notes and keys to species. Based on multigene analyses and morphology, we introduce nine new genera, viz. Aquimassariosphaeria, Aquatospora, Aquihelicascus, Fusiformiseptata, Neohelicascus, Neojahnula, Pseudojahnula, Purpureofaciens, Submersispora; 33 new species, viz. Acrocalymma bipolare, Aquimassariosphaeria kunmingensis, Aquatospora cylindrica, Aquihelicascus songkhlaensis, A. yunnanensis, Ascagilis submersa, A. thailandensis, Bambusicola aquatica, Caryospora submersa, Dictyocheirospora thailandica, Fusiformiseptata crocea, Helicosporium thailandense, Hongkongmyces aquaticus, Lentistoma aquaticum, Lentithecium kunmingense, Lindgomyces aquaticus, Longipedicellata aquatica, Neohelicascus submersus, Neohelicomyces dehongensis, N. thailandicus, Neohelicosporium submersum, Nigrograna aquatica, Occultibambusa kunmingensis, Parabambusicola aquatica, Pseudoasteromassaria aquatica, Pseudoastrosphaeriella aquatica, Pseudoxylomyces aquaticus, Purpureofaciens aquatica, Roussoella aquatica, Shrungabeeja aquatica, Submersispora variabilis, Tetraploa puzheheiensis, T. yunnanensis; 16 new combinations, viz. Aquimassariosphaeria typhicola, Aquihelicascus thalassioideus, Ascagilis guttulaspora, A. queenslandica, A. seychellensis, A. sunyatsenii, Ernakulamia xishuangbannaensis, Neohelicascus aquaticus, N. chiangraiensis, N. egyptiacus, N. elaterascus, N. gallicus, N. unilocularis, N. uniseptatus, Neojahnula australiensis, Pseudojahnula potamophila; 17 new geographical and habitat records, viz. Aliquandostipite khaoyaiensis, Aquastroma magniostiolata, Caryospora aquatica, C. quercus, Dendryphiella vinosa, Ernakulamia cochinensis, Fissuroma neoaggregatum, Helicotruncatum palmigenum, Jahnula rostrata, Neoroussoella bambusae, N. leucaenae, Occultibambusa pustula, Paramonodictys solitarius, Pleopunctum pseudoellipsoideum, Pseudocapulatispora longiappendiculata, Seriascoma didymosporum, Shrungabeeja vadirajensis and ten new collections from China and Thailand, viz. Amniculicola guttulata, Aquaphila albicans, Berkleasmium latisporum, Clohesyomyces aquaticus, Dictyocheirospora rotunda, Flabellascoma fusiforme, Pseudoastrosphaeriella bambusae, Pseudoxylomyces elegans, Tubeufa aquatica and T. cylindrothecia. Dendryphiella phitsanulokensis and Tubeufa roseohelicospora are synonymized with D. vinosa and T. tectonae, respectively. Six orders, 43 families and 145 genera which belong to freshwater Dothideomycetes are reviewed. Of these, 46 genera occur exclusively in freshwater habitats. A world map illustrates the distribution of freshwater Dothideomycetes

Tetraploa yunnanensis (MFLU 19-0524, holotype). a, b Colonies on natural substrate. c–h Conidia. i Germinated conidium. j, k