Acremoniisimulans cocois Konta & K.D. Hyde. sp. nov.

MycoBank number: MB 559681; Index Fungorum number: IF 559681; Facesoffungi number: FoF 10827;

Etymology: Refer to the host genus Cocos.

Holotype: MFLU: 152350.

Saprobic on dead petiole of Cocos nucifera. Sexual morph: Ascomata 170–230 × 110–200 μm ( = 200 × 140 μm, n = 10), solitary, immersed to semi-immersed, oval to globose, or irregular, with central raised, dark, papilla, ostiole with periphyses. Peridium 10–25 μm ( = 20 μm, n = 20), outer cells merging with the host epidermal cells, composed of dark brown to black cells of textura angularis. Paraphyses 2–4.5 μm ( = 3.2 μm, n = 50), hyaline, branched, septate, longer than asci. Asci 28–65 × 6–13 μm ( = 44 × 9 μm, n = 50), 4–8-spored, unitunicate, oblong to clavate, pedicelate, apex rounded, J- apical ring. Ascospores 9–14 × 3–6 μm ( = 11.4 × 4.3 μm, n = 100), biseriate, oblong to broadly oblong, straight or curved, rough, or sometimes conical at both ends, hyaline, 1-celled, guttules. Asexual morph: Undetermined.

Fig. XX Acremoniisimulans cocois (MFLU 152350, holotype). a, b Appearance of ascomata on host substrate. c, d Close up of ascomata. e Section of ascoma. f Peridium. g, h Paraphyses. i–o Asci. p J- apical ring. q, r Germinated ascospores. k–m Ascospores. Scale bars: b = 1000 μm, c, d = 200 μm, d = 100 μm, e = 50 μm, f–o = 20 μm, p–y = 10 μm.