Acrogenospora yunnanensis D.F. Bao, Z.L. Luo, K.D. Hyde & H.Y. Su, sp. nov. 2020
Index Fungorum number: IF 557600; Facesoffungi number: FoF 07985
Holotype: CHINA, Yunnan Province, Laojunshan Mountain, on decaying wood submerged in a stream, August 2015, A.L. Shi, S-1114 (MFLU 20–0292, holotype); ex-type culture, MFLUCC 18–1611. CHINA, Gaoligingshan mountain, saprobic on decaying wood submerged in a stream, August 2015, A.L. Shi. S-774 (DLU 774, isotype), living culture, MFLUCC 20– 0099.
Morphological description
Saprobic on submerged decaying wood. Sexual morph: Undetermined. Asexual morph: Colonies effuse on natural substrate, hairy, dark brown. Mycelium partly immersed, partly superficial, composed of septate, brown to dark brown, branched, smooth hyphae. Conidiophores 260–390 × 8.5–12 µm (x¯ = 326 × 10.3 µm, n = 15), mononematous, macronematous, solitary, erect, straight or slightly flexuous, cylindrical, 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 23–32.5 × 22–30 µm (x¯ = 28 × 26 µm, n = 30), acropleurogenous, solitary, spherical or subspherical, truncate at base, aseptate, hyaline when young, dark brown to black when mature, smooth.
Habitat: on decaying wood submerged in a stream.
Distribution: Yunnan Province, Laojunshan Mountain,china.
GenBank Accession: LSU MT340734; SSU MT340745; RPB2 MT367161; TEF-1α MT367153
Notes: In the phylogenetic analysis, Acrogenospora yunnanensis shares a sister relationship to A. submersa. Morphologically, A. yunnanensis can be distinguished from A. submersa by the longer conidiophores (Table 2) and color of conidia. Acrogenospora yunnanensis has dark brown to black conidia with a large guttule, while conidia of A. submersa are pale orange-brown to olivaceous brown at maturity and lack a guttule.
Reference: Dan-Feng Ba1,2,3, Eric H. C. McKenzie4, D. Jayarama Bhat5 et al.
Acrogenospora yunnanensis. (MFLU 20–0292, holotype) (a) Colony on wood. (b-d) Conidiophores, conidiogenous cells and conidia. (e-g) Conidiogenous cells and conidia. (h-k) Conidia. Scale bars. (a) 200µm. (b-d)50µm. (e-g)30µm. (h-j)15µm.
