Jattaea reniformis
Jattaea reniformis Z.F. Zhang & L. Cai, sp. nov., Fig. 48
Index Fungorum number: 557753, Facesofungi number: FoF 08462; Fig. 48
Etymology: Referring to its reniform conidia.
Holotype: HMAS 247995.
Hyphae hyaline, septate, branched, smooth, 1.5–3.5 μm wide. Asexual morph Conidiophores micronematous, reduced to conidiogenous cells. Phialides arise from prostrate aerial hyphae solitary, lateral, monophialidic, long ampulliform to tapering, smooth to slightly granulate, hyaline, various in length, 4.5–11.5 µm long, 1.5–3.0 µm diam. at base, with conspicuous collarette, tapering to 1.0–1.5 µm below the collarette; adelophialides subcylindrical or ampulliform, 1.5–3.0 µm × 1.0–2.0 µm. Conidia aggregated in globose heads, cylindrical to reniform, unicellular, smooth, hyaline, various in size, 3.0–6.0 × 1.0–2.0 µm (x̄ ± SD = 4.2 ± 0.66 × 1.5 ± 0.21 µm, n = 60). Sexual morph not observed. Culture characteristics—Colonies on PDA attaining 32–38 mm diam. after 4 weeks, plicated, margin entire, pale linen (5A2), aerial mycelia sparse. Reverse plicated, cream-white to yellow (4A7). Colonies on OA attaining 32–36 mm diam. after 4 weeks, fat, margin entire, white at margin, light gray (4B2) at middle, gainsboro (4A2) in center, aerial mycelia sparse. Reverse white to gainsboro (4B2) with gray ring (4B2). Colonies on SNA attaining 35–38 mm diam. after 4 weeks, fat, margin erose, white, aerial mycelia extremely sparse. Reverse white. Sporulation within 3 weeks.
Material examined: CHINA, Yunnan, Yiliang, Sanjiao Cave, N 25.134°, E 103.383°, on soil, May 2016, Z.F. Zhang, HMAS 247995 (holotype designated here), ex-type living culture CGMCC3.19311 = LC12509; ibid., LC12510.
Notes: This species should be classifed into genus Jattaea, because it fits well to the asexual morphs of Jattaea, i.e. short-ampulliform to elongate-ampulliform to cylindrical phialides or adelo-phialides, tapering, with a more or less conspicuous funnel-shaped collarette (Réblová 2011; Réblová et al. 2015). Meanwhile, our strains are phylogenetically allied with Jattaea species based on ITS, LSU and TUB sequences (Fig. 47). Jattaea reniformis is currently known only for its asexual morph and comparable with J. aphanospora Réblová & J. Fourn., J. ribicola Réblová & Jaklitsch and J. tumidula (Sacc.) Réblová. While J. reniformis difers from J. aphanospora and J. ribicola by the presence of phialides and adelophialides, whereas only adelophialides are observed in J. aphanospora and J. ribicola. J. reniformis difers from J. tumidula by its subcylindrical or ampulliform adelophialides and wider conidia (1.0–2.0 µm vs. 1.0–1.2 µm); meanwhile only subcylindrical adelophialides was observed in J. tumidula. Generally J. reniformis is well distinguishable from other species in Jattaea by the absence of conidiophores.
Fig. X Jattaea reniformis (from ex-holotype CGMCC3.19311). a–c Upper and reverse views of cultures on PDA, OA and SNA 4 weeks after inoculation; d–j phialides and conidia in globose heads; k conidia. Scale bars: d–k 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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