Acrogenospora aquatica2020

Acrogenospora aquatica D.F. Bao, Z.L. Luo, K.D. Hyde & H.Y. Su, sp. nov. 2020

Index Fungorum number: IF 557599; Facesoffungi number: FoF 07984

Holotype: CHINA, Yunnan Province, Dali, Cangshan Mountain, on decaying wood submerged in a stream, January 2016, Q.S. Zhou, S-763 (MFLU 20–0291, holotype), ex-type culture MFLUCC 20–0097. CHINA, Yunnan Province, Dali, Cangshan Mountain, on decaying wood submerged in Qingbixi Stream, March 2016, Z. L. Luo, S-282 (DLU 282, isotype), living culture MFLUCC 16-0949.

Morphological description

Saprobic on submerged decaying wood. Sexual morph: Undetermined. Asexual morph: Colonies effuse on natural substrate, hairy, dark brown. Mycelium mostly immersed, composed of septate, grayish brown, branched, smooth hyphae. Conidiophores 200–250 × 7.5–9.5 µm (x¯ = 226 × 8.6 µm, n = 15), mononematous, macronematous, solitary, erect, straight or slightly flexuous, cylindrical, indeterminate, unbranched, brown to dark brown, paler toward apex, septate, smooth.

Conidiogenous cells holoblastic, monoblastic, integrated, initially terminal, later becoming intercalary, cylindrical, smooth, pale brown, proliferating percurrently. Conidia 29–34.5 × 24–31 µm (x¯ = 31.8 × 27.7 µm, n = 30), acrogenous, solitary, subprolate to broadly ellipsoidal, base truncate, dark brown to black, aseptate, lacking guttules, with a hyaline, globose to subglobose basal cell, smooth.

Habitat: on decaying wood submerged in a stream.

Distribution: Yunnan Province, Dali, Cangshan Mountain, china.

GenBank Accession: LSU MT340732; RPB2 MT367160; TEF-1α MT367152

Notes: In our study, we found two species, A. basalicellularispora and A. aquatica with a hyaline, globose to subglobose basal cell. Acrogenospora aquatica can be addition, conidia of A. basalicellularispora are pale orange-brown distinguished from A. basalicellularispora by the size of to olivaceous-brown, with several small to large guttules, while conidiophores (259–395 × 8–12 vs. 202–250 × 7.8–9.3 µm). In conidia of A. aquatica are dark brown to black and lack guttules.

Reference: Dan-Feng Ba^1,2,3, Eric H. C. McKenzie⁴, D. Jayarama Bhat⁵ et al.

Acrogenospora aquatica.  (MFLU 20–0291, holotype) (a,b) Colonies on wood. (c-f) Conidiophores, conidiogenous cells and conidia. (g-i) Conidiogenous cells and conidia. (j-m) Conidia. (n) Germinating conidium. Scale bars. (a,b)200µm. (c-f)100µm. (g-i)30µm. (j-n)20µm.