Conidiocarpus siamensis (Chomnunti & K.D. Hyde) T. Bose, in Bose, Reynolds & Burbee, Mycologia 106(4): 753 (2014)
≡ Phragmocapnias siamensis Chomnunti & K.D. Hyde, in Chomnunti et al., Fungal Diversity 51(1): 112 (2011)
= Phragmocapnias asiaticus Chomnunti & K.D. Hyde, in Chomnunti et al., Fungal Diversity 51(1): 111 (2011)
Saprobic on sugary exudates from insects growing on the surface of living leaves. Thallus composed of brown to pale brown, sub-cylindrical, irregularly branched, septate, network-like hyphe. Sexual morph: see Chomnunti (2011). Asexual morph: Conidiomata 1300–1500 μm high, 90–100 μm wide, brown to dark brown, pycnidial, solitary to gregarious, superficial, differentiated into a stalk and a conidiiferous locule; stalk 760–110 µm long, 40–70 µm wide, black to dark brown, subcylindrical, straight or variously curved, unbranched or branched, thick-walled; locule 120–260 μm high, 60–90 μm wide, swollen, globose, bearing pale brown, cylindrical, long rostrate apex. Rostrate apex apical, centrally located, surrounded by hyaline hyphae. Stalk wall composed of thick-walled, dark brown cells of textura porrecta. Pycnidial wall composed of thick-walled, brown to pale brown cells of textura angularis, becoming thin-walled, pale brown cells of texture prismatica towards apex. Conidiophores arising from the inner layers of pycnidial wall. Conidiogenous cells not observed. Conidia 6–11 × 4–5.5 μm (x= 9 × 5 μm, n=20), hyaline, ellipsoid to cylindrical, rounded at both ends, unicellular, smooth-walled, eguttulate.
Material examined: Thailand, Chiang Rai, Thasud Tha Sut, on living leaves of Ficus sp. (Moraceae), 3 December 2013, Qing Tian, TS02 (MFLU 19-2891), living culture MFLUCC 14-0179.
Conidiocarpus siamensis (MFLU 19-2891) a, b Sooty moulds on the surface of host plant. c, d Appearance of dark brown conidiomata on the host surface. e Pycnidial wall. f Ostiole surrounded by hyaline hyphae. g Network-like hyphae. h–j Slide view of stalked pycnidia. k Rostrate apex. l Germinating conidia. m Conidia. n, o Culture on MEA. Scale bars c–d, i = 100 μm, e–g, j–l = 20 μm, h = 200 μm, m = 10 μm.
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.