Hypocreales » Bionectriaceae » Paracylindrocarpon

Paracylindrocarpon xishuangbannaensis

Paracylindrocarpon xishuangbannaensis Tibpromma & K.D. Hyde, in Tibpromma et al., Fungal Diversity: 10.1007/s13225-018-0408-6, [104] (2018)

Index Fungorum number: IF554535         Facesoffungi number: FoF04543

Sexual morph: Ascomata 225–300 × 277.5–295 lm (x̄ = 259 × 288.5 μm, n = 5), scattered to gregarious, globose to subglobose, superficial, flat at the base, conspicuous on the host surface, easy to remove, orange, dull, solitary, uniloculate, with pale brown papilla, with central ostiole. Peridium 33–70.5 μm wide, composed of several layers of thick-walled, hyaline to pale brown cells of textura angularis. Hamathecium comprising 2.2–4 μm wide, cylindrical, filamentous, unbranched, guttulate, septate paraphyses. Asci 67–95 × 10–17 μm (x̄ = 72 × 12 μm, n = 20), 8-spored, unitunicate, cylindrical-clavate, with short pedicel, with J- apical ring. Ascospores 27–41 × 3–8 lm (x̄ = 34.5 × 5.6 μm, n = 20), fusiform, conical towards both ends, 3–5-septate, not constricted at septa, hyaline, guttulate without mucilaginous sheath, smooth-walled. Asexual morph: Undetermined.

Culture characteristics: Ascospores germinating on PDA within 12 h. Colonies on PDA, yellow–white, with irregular whorls, raised and rough on media surface, yellow–brown in reverse.

Habitat: Known to inhabit saprobic on dead leaves of Pandanus sp..

 

Known distribution: China.

 

Material examined: China, Yunnan Province, Xishuangbanna, Nabanhe, on Pandanus sp., 27 July 2016, PE Mortimer NBH04 (HKAS 96204, holotype); ex-type living culture, KUMCC 16-0144 = MFLUCC 17-0557.

 

GenBank Accession No: LSU: MH376732; ITS: MH388358; SSU: MH388326.

Notes: Here we provide first record sexual morphs of Paracylindrocarpon. Based on morphology P. xishuangbannaensis and P. nabanheensis both have fusiform, 3–5- septate, hyaline ascospores, that are not constricted at septa, while P. xishuangbannaensis has 72 × 12 µm, 8-spored asci, with 34.5 × 5.6 lm ascospores, but P. nabanheensis has smaller (6–)8-spored, 64.4 × 10.5 µm asci, with larger ascospores (41 × 6.5 µm). In a BLASTn search on NCBI GenBank, the closest matches of ITS sequence of KUMCC 16-0144 is Hyaloseta nolinae with 90% identity to the strain CBS 109837 (NR_156291).

Figure X. Paracylindrocarpon xishuangbannaensis (HKAS 96204, holotype). a, b Appearance of ascomata on host substrate. c Section of ascoma. d Section of peridium. e Hamathecium. f Papilla. g Ostiole. h, i Asci. j Ascus strained with cotton blue reagent. k–n Ascospores. o Germinating ascospore. Scale bars: c = 40 µm, d, f = 20 µm, e = 5 µm, g–o = 10 µm.

 

Reference: Tibpromma S, Hyde KD, McKenzie EHC, Bhat DJ, Phillips AJL, Wanasinghe DN, Samarakoon MC, Jayawardena RS, Dissanayake AJ, Tennakoon DS, Doilom M, Phookamsak R, Tang AMC, Xu JC, Mortimer PE, Promputtha I, Maharachchikumbura SSN, Khan S, Karunarathna SC (2018) Fungal diversity notes 840–928: micro-fungi associated with Pandanaceae. Fungal Diversity. 93:1-160.

 

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