Hypocreales » Nectriaceae » Pandanaceomyces

Pandanaceomyces krabiensis

Pandanaceomyces krabiensis Tibpromma & K.D. Hyde, in Tibpromma et al., Fungal Diversity: 10.1007/s13225-018-0408-6, [107] (2018)

Index Fungorum number: IF554538         Facesoffungi number: FoF04545


Sexual morph: Ascomata 115–133 × 100–120 μm (x̄ = 125 × 109 μm, n = 5), scattered to gregarious, superficial to erumpent, with flat base, conspicuous on the host surface, easy to remove, yelloworange, dull, solitary, uniloculate, oval, with hyaline papilla, with ostiole at centre. Peridium 7–10 μm wide, composed of several layers of thin-walled, yellow cells of textura prismatica. Hamathecium 8.5–11 μm wide, oval to ellipsoid, composed of cellular, unbranched, guttulate, septate paraphyses. Asci 37.5–48 × 6–11 μm (x̄ = 43 × 7.5 μm, n = 20), (6)8-spored, unitunicate, cylindrical to cylindrical-clavate, with short, furcate pedicel, with J- apical ring. Ascospores 11–16 × 2–3 μm (x̄ = 13 × 2.5 μm, n = 20), fusiform, curved towards both ends, 1-septate, not constricted at the septum, hyaline to subhyaline, guttulate, without mucilaginous sheath, smooth-walled. Asexual morph: Undetermined.


Culture characteristics: Ascospore germinating on MEA within 12 h. Colonies on MEA, purple at the central and pink at the margin, with irregular whorls, raised on media surface, dark-purple at the central with white at the margin from below.


Habitat: Known to inhabitSaprobic on dead leaves of Pandanus sp.


Known distribution: Thailand.


Material examined: Thailand, Krabi Province, Mueang Krabi District, on Pandanus sp., 14 December 2015, S. Tibpromma KB031 (MFLU 16-1909, holotype; HKAS 96258, isotype); ex-type living culture, MFLUCC 16-0323.


GenBank Accession No: LSU: MH376729; ITS: MH388355; SSU: MH388323; TEF1: MH388391.


Notes: Phylogenetic analysis of combined sequence data indicated that Pandanaceomyces krabiensis clusters in a separate clade from other members of Nectriaceae with 73% ML bootstrap support. Pandanaceomyces krabiensis has fusiform, 1-septate, not constricted at septa, hyaline to subhyaline ascospores curved towards both ends.