Nigrospora globosa
Nigrospora globosa Z.F. Zhang & L. Cai, sp. nov.
Index Fungorum number: 557754, Facesofungi number: FoF 08463; Fig. 50
Etymology: Referring to its globose conidia.
Holotype: HMAS 248000.
Hyphae hyaline to pale brown, septate, branched, smooth, 1.5–8.0 μm wide. Asexual morph Conidiophores reduced to conidiogenous cells. Conidiogenous cells arising from aerial hyphae solitary or aggregated in clusters, cylindrical, ampulliform, ellipsoidal or subglobose, straight or curved, smooth, hyaline to pale brown, 8.5–22.0 × 5.0–9.0 µm. Conidia solitary, unicellular, subglobose to globose, smooth, dark brown to black, shiny, 11.0–14.5 × 9.0–13.0 µm (x̄ ± SD = 13.0 ± 0.84 × 11.3 ± 1.0 µm, n = 60). Sterile cells and Sexual morph not observed. Culture characteristics—Colonies on PDA attaining 38–41 mm diam. after 6 days, fat, foccose, radially striate with lobate edge, white initially, becoming pale gray with age. Reverse white to light yellow (2A2) initially, becoming pink (5A2) to brown (5B3) with age. Colonies on OA attaining 50 mm diam. after 4 days, fat, aerial mycelia abundant, foccose, margin entire, white initially, becoming gray (4B2) with age. Reverse white initially, becoming pink (5A2) with age. Colonies on SNA attaining 38–41 mm diam. after 6 days, fat, margin entire, white to pale yellow (3A3) initially, then becoming pale gray with gray (4B2) sporulation patches. Reverse white to pale yellow (4A1-4A2). Sporulation within 7 days.
Material examined: CHINA, Guangxi, Guilin, Luotian Cave, N 24.948°, E 110.524°, on soil, May 2016, Z.F. Zhang, HMAS 248000 (holotype designated here), extype living culture CGMCC3.19633 = LC12440; ibid., LC12441.
Notes: Our two strains representing N. globosa clustered with N. chinensis Mei Wang & L. Cai in a distinct clade (Fig. 49). Morphologically, N. globosa difers from N. chinensis by its larger conidiogenous cells (8.5–22.0 × 5.0–9.0 µm vs. 5.0–9.5 × 4.0–7.0 µm), and the absence of sterile cells in N. globosa.
Nigrospora globosa (from ex-holotype CGMCC3.19633). a–c Upper and reverse views of cultures on PDA, OA and SNA 6 days after inoculation; d condia under stereomicroscope; e–h conidiogenous cells and conidia; i conidia. Scale bars: d 100 µm; i 20 µm; e–h 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
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