Cordyceps inthanonensis Mongkols., Tasan., Thanakitp. & Luangsa-ard, Mycol. Progr. 19(9): 973 (2020)
Index Fungorum number: IF 835365; Facesoffungi number: FoF 13960
Parasitic on insect cocoon. Sexual morph: Stromata 3.5 cm in high, multiple, cylindrical, orange-yellow, fleshy, stipitate, branched. Fertile part 1 cm high, 3 mm wide, subterminal, slightly attenuate toward the apex. Perithecia 680–790 × 370–550 (x̄ = 374 × 479, n = 10) μm, ovoid, superficial, ostiolate. Peridium 15–35 (x̄ = 24, n = 30) μm, composed of thick-walled, yellow cells of textura angularis. Asci 320–530 × 3.2–5.1 (x̄ = 24 × 435, n = 25) μm, filiform, eight-spored, with a thickened apical cap which pierced by a channel. Ascospores filiform, multiseptate, hyaline, as long as the asci, fragmenting into secondary spores at maturity. Secondary ascospores 2.6–4.6 × 0.8–1.4 (x̄ = 3.5 × 1.1, n = 55) μm, cylindrical, hyaline, aseptate, with truncated ends. Asexual morph: Undetermined.
Material examined – China, Yunnan Province, Honghe County, Amushan natural reserve, on insect cocoon lying on leaf litter, 19 July 2017, Samantha C. Karunarathna, Y27 (HKAS 102448).
Notes – Based on phylogeny, the collection (HKAS 102448) clusters with Cordyceps inthanonensis with great support (Fig. 1). Our collection morphologically resembles C. inthanonensis in producing orange, fleshy, stipitate stroma, subterminal fertile part, superficial perithecia, filiform, multiseptate, disarticulating ascospores and cylindrical secondary ascospores (Mongkolsamrit et al. 2020b).
Cordyceps inthanonensis (HKAS 102448) a Stromata. b Stromata growing from host. c Close-up of stroma. d Perithecium. e Vertical section of perithecia. f Peridium. g Asci. h Ascospore. i Ascus cap, j Secondary ascospores. Scale bar: c = 3000 μm, d, e = 300 μm, g, h = 50 μm, f = 30 μm, i, j= 5 μm
Wei DP, Gentekaki E, Wanasinghe DN, Karunarathna SC, Tang SM, Hyde KD 2022 – Diversity, molecular dating and ancestral characters state reconstruction of entomopathogenic fungi in Hypocreales. Mycosphere 13: 281–351.
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