Auxarthronopsis pulverea Z.F. Zhang & L. Cai, sp. nov. 2020
Index Fungorum number: 556416；Facesoffungi number: FoF 08435
Holotype: CHINA, Sichuan, Huaying, Liujia Cave, N 30.41°, E 106.878°, on plant debris, May 2016, Z.F. Zhang, HMAS 248008 (holotype designated here), ex-type living culture CGMCC3.19312 = LC12521; ibid., LC12522.
Morphological description
Hyphae hyaline, septate, branched, smooth. Asexual morph Arthroconidia abundant, mostly intercalary or terminal, few lateral, unicellular, solitary, straight or slightly curved, hyaline, intercalary conidia cylindrical, terminal and lateral conidia cylindrical or ellipsoidal with truncated base, sessile or short stalked, frequently separated by 1–3 autolytic connective cells, 3.0–6.0 × 2.0–3.5 µm ( x̄ ± SD = 4.5 ± 0.76 × 2.6 ± 0.36 µm, n = 50). Sexual morph not observed. Culture characteristics—Colonies on PDA attaining 25–28 mm diam. after 4 weeks, flat, felty, annular, margin radially striate with lobate edge, beige (2A2) at margin, yellow (3A3-3B5) at middle, white to pale orange (3A2) in center. Reverse beige (2A2) to brown (4B8), with pale yellow (3A5) ring at middle. Colonies on OA attaining 29–34 mm diam. after 4 weeks, flat, powdery, white. Reverse white to beige (30A2). Sporulation within 3 weeks on OA. Colonies on SNA attaining 24–29 mm diam. after 4 weeks, margin rhizoids, white, aerial mycelia sparse. Reverse white.
Habitat: on plant debris.
Distribution: Sichuan, Huaying, Liujia Cave, China.
GenBank Accession:
Notes: Auxarthronopsis pulverea is phylogenetically closely related to A. stercicola (Fig. 15). However, terminal and lateral conidia of A. stercicola are much more abundant than those of A. pulverea.
Reference: Zhi‑Feng Zhang ,Shi‑Yue Zhou ,Lily Eurwilaichitret al.
Auxarthronopsis pulverea (from ex-holotype CGMCC3.19312). a–c Upper and reverse views of cultures on PDA, OA and SNA 4 weeks after inoculation; d–h arthroconidia. Scale bars: d–h 10 μm.
