Distoseptispora fujianensis M. G. Liao & Jian Ma, 2025

Distoseptispora fujianensis M. G. Liao & Jian Ma sp. nov.

Fig. 3 View Figure 3

Type.

China • Fujian Province, Nanping City, Wuyishan National Nature Reserve , 27°43′N, 117°41′E, on decaying wood of an unidentified broadleaf tree, 16 October 2023, Y. F. Hu (holotype HJAUP M 2509 ; ex-type living culture HJAUP C 2509 ) GoogleMaps .

Etymology.

In reference to Fujian Province, where the fungus was collected.

Description.

Saprobic on dead branches in a terrestrial habitat. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on natural substrate effuse, scattered, dark brown to black, hairy. Mycelium partly superficial, partly immersed in the substratum, composed of branched, septate, smooth, pale brown to brown hyphae. Conidiophores macronematous, mononematous, unbranched, solitary or in groups of 2 or 3, straight or slightly flexuous, cylindrical, 6–9 - septate, brown to dark brown, 86–127 × 4.5–6 µm (x ̄ = 103.4 × 5.2 µm, n = 11). Conidiogenous cells monoblastic, integrated, terminal, cylindrical, brown, smooth, determinate, flat at the conidiogenous loco. Conidia solitary, acrogenous, dry, obclavate or ellipsoidal, smooth, 6–8 - distoseptate, brown, apical cell paler, 28–47 × 8–14 µm (x ̄ = 37.7 × 10.3 µm, n = 23), tapering to 4.5–9 µm near the apex, 4.5–7 µm wide at the truncate base.

Culture characteristics.

Colonies on PDA reaching 60–63 mm diam. after 4 weeks in an incubator under dark conditions at 25 ° C, circular, surface velvety, with pale brown and denser mycelium and the black edge, reverse black.

Additional specimen examined.

China • Fujian Province, Nanping City, Wuyishan National Nature Reserve , 27°43′N, 117°41′E, on decaying wood of an unidentified broadleaf tree, 16 October 2023, Y. F. Hu (paratype HJAUP M 2513 , living culture HJAUP C 2513 ) GoogleMaps .

Notes.

Phylogenetic analyses shows that two strains of D. fujianensis ( HJAUP C 2509 and HJAUP C 2513 ) form a highly support clade, sister to D. lanceolatispora X. M. Chen & Y. Z. Lu ( GZCC 22-2045), with 100 % ML / 1.00 BI support. A BLASTn search of GenBank reveals that the sequences of D. fujianensis ( HJAUP C 2509 ) and D. lanceolatispora ( GZCC 22-2045) share 96 % similarity (504 / 527, 9 gaps) in ITS, 99 % similarity (567 / 572, 1 gap) in LSU, 92 % similarity (990 / 1075, no gaps) in RPB 2, and 98 % similarity (884 / 906, no gaps) in TEF 1. Moreover, D. fujianensis differs from D. lanceolatispora ( Chen et al. 2024) by having shorter conidiophores (86–127 µm vs. 120–190 µm) and smaller conidia (28–47 × 8–14 µm vs. 31–90 × 9.5–15 µm). In addition, D. fujianensis further differs from D. lanceolatispora by its terrestrial habitat, as opposed to the freshwater habitat of D. lanceolatispora .