Paracremonium apiculatum
Paracremonium apiculatum Z.F. Zhang & L. Cai, sp. nov.
Index Fungorum number: 557742, Facesofungi number: FoF 08451; Fig. 35
Etymology: Referring to its terminally apiculate conidia.
Holotype: HMAS 248078.
Hyphae hyaline, smooth, thick-walled, septate, branched, 2.0–7.0 µm diam. Asexual morph Conidiophores arising from vegetative hyphae solitary or tightly aggregated in cream-white, slimy sporulation, erect, simple or mostly branched, septate, bearing whorls of 2–6 conidiogenous cells. Conidiogenous cell terminal or lateral, straight, acicular, tapering towards apex, smooth, hyaline, 14–24 µm long, 1.5–3.0 µm wide at base, with prominent periclinal thickening and inconspicuous collarette, 1.0–1.5 µm diam. Conidia abundant, unicellular, subglobose to globose, apiculate, smooth, thick-walled, hyaline, 3.5–5.0 µm (x̄ ± SD = 4.13 ± 0.3 µm, n = 60). Chlamydospores and Sexual morph not observed. Culture characteristics—Colonies on PDA attaining 25–30 mm diam. after 15 days, fat, felty, margin entire, cream-white (1A1), aerial mycelia sparse. Reverse white to beige (30A1). Colonies on OA attaining 24–33 mm diam. after 15 days, fat, margin unclear, aerial mycelia extremely sparse, with cream-white and slimy sporulation in center. Reverse foralwhite (1A2). Colonies on SNA attaining 28–33 mm diam. after 15 days, fat, annular, margin entire, white to foralwhite, aerial mycelia extremely sparse with slimy sporulation scattered. Reverse annular, white to foralwhite (1A2). Sporulation within 10 days.
Material examined: CHINA, Yunnan, Yiliang, Sanjiao Cave, N 25.134°, E 103.383°, on soil, May 2016, Z.F. Zhang, HMAS 248078 (holotype designated here), ex-type living culture CGMCC3.19309 = LC12501; ibid., LC12502.
Notes: P. apiculatum can be easily distinguished from phylogenetically allied species (Fig. 34), P. variiforme, by its smaller ellipsoidal conidia with apiculate bases, which are ovoid or elliptical in P. variiforme (3.5–5.0 µm vs. 9.0–14.5 µm). Moreover, its conidiogenous cells are much shorter than those of P. variiforme (14–24 µm vs. 18–41 µm).
Fig. X Paracremonium apiculatum (from ex-holotype CGMCC3.19309). a–c Upper and reverse views of cultures on PDA, OA and SNA 15 days after inoculation; d sporulation on PDA under stereomicroscope; e–h conidiophores, phialides and conidia; i conidia. Scale bars: d 100 µm; e 20 µm; f–i 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