Ascocratera
Ascocratera Kohlm., Can. J. Bot. 64(12): 3036 (1986).
Index Fungorum number: IF 25019; Facesoffungi number: FoF 08138, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on host. Sexual morph: Ascomata conical, craterlike, erumpent and superficial when mature, seated on a black stroma, ostiolate, periphysate, epapillate, carbonaceous, black, with irregular bulges or ridges around the ostiole, gregarious. Ostiole depressed; ostiolar canal periphysate. Peridium thick, composed of small irregular cells, encrusted with melanin particles, forming a textura angularis, enclosing cells of the host. Pseudoparaphyses trabeculate, unbranched at the base and embedded in a gelatinous matrix, free at the tips, branching and anastomosing. Asci 8-spored, cylindrical, pedunculate, thick-walled, fissitunicate, with a refractive apical ring in the endoascus, not bluing in IKI, arising from a basal ascogenous tissue. Ascospores overlapping monostichously in the ascus, ellipsoidal, at first 1-, later 3-septate, constricted at the central primary septum, hyaline, surrounded by a gelatinous sheath. Asexual morph: Unknown (adapted from Kohlmeyer 1986).
Type species: Ascocratera manglicola Kohlm.
Notes: Ascocratera is characterised by conical, craterlike, erumpent ascomata, depressed ostiole, trabeculate pseudoparaphyses, fissitunicate, asci and ellipsoid 3-septate ascospores surrounded by a gelatinous sheath. Ascocratera resembles Rimora in having carbonaceous apapillate ascomata, trabeculate pseudoparaphyses, cylindrical asci and septate ascospores surrounded with a sheath. Ascocratera is however not congeneric with Rimora and can be differentiated from similar genera based on DNA sequence data. Molecular data available for Ascocratera are LSU, SSU, RPB2 and TEF-1.
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