Distoseptisporales » Distoseptisporaceae » Distoseptispora

Distoseptispora fluminicola

Distoseptispora fluminicola McKenzie, H.Y. Su, Z.L. Luo & K.D. Hyde

 

Index Fungorum number: IF551832; Facesoffungi number: FoF 01756; Fig. 17


Etymology: In reference to living in a stream.
Holotype: HKAS 84006

 

Colonies on the substratum superficial, effuse, hairy or velvety, black. Mycelium mostly immersed, composed of branched, septate, smooth, pale brown hyphae. Sexual morph: Undetermined. Asexual morph: Conidiophores macronematous, mononematous, septate, unbranched, single or in groups of 2 or 3, erect, straight or flexuous, smooth, olive-green, cylindrical, robust at the base,21–33 μm (x̄=27 μm, SD = 6, n = 10) long, 5.5–6.5 μm (x̄=6 μm, SD = 0.5, n = 10) wide. Conidiogenous cells monoblastic, integrated, determinate, terminal, yellow, cylindrical. Conidia acrogenous, solitary, dry, oblong, obclavate, cylindrical or rostrate, elongated, straight or curved, truncate at the base, rounded at the apex, 17–34-distoseptate, smooth, brown with green tinge, paler towards the apex, thick-walled, 125–250 μm (x=189 ̄ μm, SD = 62, n = 30) long, 13–15 μm (x=14 ̄ μm, SD = 1, n = 30) wide. Conidial secession schizolytic. (Description based from Su et al. 2016)

 

Distribution: China, Yunnan Province, Dali, on submerged wood (Su et al. 2016).

 

Notes: Distoseptispora fluminicola is introduced here based on both morphology and molecular data. Distoseptispora fluminicola clusters with D. aquatica and Distoseptispora sp. (strain HLXM 15–1). Distoseptispora fluminicola is characterized by its unbranched conidiophores that are single or in groups of 2 or 3, erect, and conidia that are obclavate, cylindrical or rostrate, elongate, straight or curved, distinctly distoseptate, smooth-walled and dark and appear somewhat indeterminate in length. This taxon resembles Ellisembia adscendens (= Sporidesmium adscendens Berk.) and has often been named as this species (Shenoy et al. 2006), but it differs in having shorter conidia (Réblová 1999). Ellisembia adscendens is considered to be the asexual morph of Miyoshiella triseptata (Shoemaker & G.P. White) Réblová (Réblová 1999), and is distinct from Distoseptispora fluminicola. Miyoshiella is presently placed in Chaetosphaeriaceae and is a terrestrial genus on wood, particularly in Europe. Ellisembia adscendens was described from a polypore from the Falkland Islands (Berkeley 1840), which further indicates that these are unlikely to be the same species.

 

Other species:

Distoseptispora appendiculata Bao et al.; Distoseptispora aquatica Luo et al.
Distoseptispora cangshanensis Luo et al.
Distoseptispora guttulata J. Yang & K.D. Hyde
Distoseptispora multiseptata J. Yang & K.D. Hyde
Distoseptispora neorostrata Bao et al.

Distoseptispora obclavata Bao et al.
Distoseptispora obpyriformis Z.L. Luo & H.Y. Su
Distoseptispora phangngaensis Yang et al.
Distoseptispora rostrata Luo et al.
Distoseptispora submersa Luo et al.
Distoseptispora suoluoensis Yang et al.
Distoseptispora lignicola Bao et al.

 

References

Berkeley MJ (1840) Descriptions of two new fungi in the collection of sir W.J. Hooker. Lond J Bot 2:146–147

Hyde KD, Norphanphoun C, Maharachchikumbura SSN, Bhat DJ et al. 2020 – Refined families of Sordariomycetes. Mycosphere 11(1): 305–1059.

Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.

Reblová M. 1999c − Studies in Chaetosphaeria sensu lato III. Umbrinosphaeria gen. nov. and Miyoshiella with Sporidesmium anamorphs. Mycotaxon 71, 13−43.

Shenoy BD, Jeewon R, Wu WP, Bhat DJ, Hyde KD. 2006 – Ribosomal and RPB2 DNA sequence analyses suggest that Sporidesmium and morphologically similar genera are polyphyletic. Mycol Res 110:916–928.

Su HY, Hyde KD, Maharachchikumbura SSN, Ariyawansa HA et al. 2016 – The families Distoseptisporaceae fam. nov., Kirschsteiniotheliaceae, Sporormiaceae and Torulaceae, with new species from freshwater in Yunnan Province, China. Fungal Diversity. 80:375-409.