Setophaeosphaeria microspora
Setophaeosphaeria microspora Z.F. Zhang & L. Cai, sp. nov.
Index Fungorum number: 556393, Facesofungi number: FoF 08426; Fig. 8
Etymology: Referring to its smaller conidia than other species in this genus.
Holotype: HMAS 247990.
Hyphae hyaline to brown, septate, branched. Asexual morph Conidiomata pycnidial, single or eustromatic, superfcial or immersed, globose, brown, up to 260 µm diam, with central ostiole. Pycnidial wall of 2–3 layers of the brown textura angularis. Setae slightly fexuous, septate, unbranched, smooth, thick-walled, brown to pale brown from base to apex, more abundant surrounding ostiole, with obtuse ends, 45–130 µm long, 2.0–4.0 µm wide. Conidiogenous cells lining the inner cavity, ampulliform, proliferating several times percurrently at apex, smooth, hyaline, 7.0–10.0 × 2.5–4.0 µm. Conidia abundant, unicellular, cylindrical, guttulate, with obtuse ends, smooth, hyaline, 3.0–4.5 × 1.5–2.0 µm (x̄ ± SD = 4.0 ± 0.25 × 1.7 ± 0.13 µm, n = 60). Sexual morph not observed. Culture characteristics—Colonies on PDA attaining 30–34 mm diam. after 10 days, fat, margin entire, beige (2B4) to olive (2E3) from margin to center. Reverse beige (2B4) to olive (2E3). Colonies on OA attaining 34–37 mm diam. after 10 days, fat, ulotrichy, white to pale gray (3B1) from margin to center. Reverse white to olive (28E5).
Colonies on SNA attaining 39–40 mm diam. after 10 days, fat, cottony, margin entire, beige (3B3). Reverse beige (3B3). Sporulation within 15 d on OA and SNA.
Material examined: CHINA, Guangxi, Laibin, Sanshan Cave, N 23.41°, E 108.931°, on soil, May 2016, Z.F. Zhang, HMAS 247990 (holotype designated here), ex-type living culture CGMCC3.19301 = LC9240; ibid., LC10444.
Notes: Our strains form a distinct clade with Setophaeosphaeria species based on ITS, LSU and TUB sequences (Fig. 7), but can be distinguished from known species by its smaller conidia (> 6.0 µm long and 2.0–3.0 µm wide in other species) and larger conidiogenous cells (< 7.0 µm long in other species).
Fig. X Setophaeosphaeria microspora (from ex-holotype CGMCC3.19301). a–c Upper and reverse views of cultures on PDA, OA and SNA 14 d after inoculation; d pycnidia on SNA; d section of pycnidia; f pycnidial wall; g setae; h–i conidiogenous cells; j conidia. Scale bars: d 100 µm; e, g 20 µm; f, h–j 10 µm
Retrieved from:
Zhang ZF, Zhou SY, Eurwilaichitr L, Ingsriswang S et al. 2021 – Culturable mycobiota from Karst caves in China II, with descriptions of 33 new species. Fungal Diversity 106(1), 29-136. https://doi.org/10.1007/s13225-020-00453-7
Recent Genus
NeurosporaParacremonium
Amphichorda
Recent Species
Neurospora tetrasporaParacremonium apiculatum
Amphichorda cavernicola