Pleosporales » Torulaceae

Rostriconidium

Rostriconidium Z.L. Luo, K.D. Hyde & H.Y. Su, Mycol. Progr. 17(5): 536 (2018)

Index Fungorum number: IF 823172; Facesoffungi number: FoF 03764

 

Saprobic on submerged wood. Sexual morph: Undetermined. Asexual morph: Colonies effuse, scattered, hairy, brown. Mycelium mostly immersed, composed of pale brown, septate, unbranched hyphae. Conidiophores macronematous, mononematous, single, erect, subcylindrical, straight or flexuous, dark brown to black, paler at the apex, septate, smooth. Conidiogenous cells monotretic or polytretic, integrated, terminal, cylindrical, dark brown. Conidia solitary, dry, pyriform to rostrate, narrowly cylindrical and obtuse at the apex, dark brown to black, with a thick, black, truncate basal scar and a pale cell above the scar (Su et al. 2018).

 

Type species: Rostriconidium aquaticum Z.L. Luo, K.D. Hyde & H.Y. Su

 

Notes: Rostriconidium was introduced for a freshwater species R. aquaticum collected from China (Su et al. 2018). Rostriconidium nested in Torulaceae with high bootstrap support (Su et al. 2018; Tibpromma et al. 2018). Rostriconidium is similar to Sporidesmioides Jun F. Li et al. in having macronematous, dark brown to black conidiophores and dark brown to black, similar shape of ascospores with cylindrical, narrower apex (Li et al. 2016; Su et al. 2018). However, the former has tretic conidiogenous cells, the latter having blastic. Phylogeny clearly separates them as distinct genera (Tibpromma et al. 2018). (Notes from Dong et al. 2020)

 

List of freshwater Xenoastrosphaeriella species

Rostriconidium aquaticum Z.L. Luo, K.D. Hyde & H.Y. Su, Mycol. Progr. 17(5): 536 (2018)

Freshwater distribution: China (Su et al. 2018)

 

References

Dong W, Wang B, Hyde KD, McKenzie EHC, Raja HA, Tanaka K, Abdel-Wahab MA, Abdel-Aziz FA, Doilom M, Phookamsak R, Hongsanan S, Wanasinghe DN, Yu X-D, Wang G-N, Yang H, Yang J, Thambugala KM, Tian Q, Luo Z-L, Yang J-B, Miller AN, Fournier J, Boonmee S, Hu D-M, Nalumpang S, Zhang H (2020) Freshwater Dothideomycetes. Fungal Divers 105:319–575

Li JF, Bhat DJ, Phookamsak R, Mapook A, Lumyong S, Hyde KD (2016) Sporidesmioides thailandica gen. et sp. nov. (Dothideomycetes) from northern Thailand. Mycol Prog 15:1169–1178

Su XJ, Luo ZL, Jeewon R, Bhat DJ, Bao DF, Li WL, Hao YE, Su HY, Hyde KD (2018) Morphology and multigene phylogeny reveal new genus and species of Torulaceae from freshwater habitats in northwestern Yunnan, China. Mycol Prog 17:531–545

Tibpromma S, Hyde KD, McKenzie EHC, Bhat DJ, Phillips AJL, Wanasinghe DN, Samarakoon MC, Jayawardena RS, Dissanayake AJ, Tennakoon DS, Doilom M, Phookamsak R, Tang AMC, Xu J, Mortimer PE, Promputtha I, Maharachchikumbura SSN, Khan S, Karunarathna SC (2018) Fungal diversity notes 840–928: micro-fungi associated with Pandanaceae. Fungal Divers 93:1–160

 

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