Murichromolaenicola
Murichromolaenicola Mapook & K.D. Hyde, in Mapook et al., Fungal Diversity 101: 71 (2020).
Index Fungorum number: IF 557338; Facesoffungi number: FoF 07805, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Saprobic on dead stems. Sexual morph: Ascomata semi-immersed to superficial, solitary or scattered, appearing as dark spots, coriaceous, globose to obpyriform, light brown to brown. Ostiolar neck protruding, with hyaline periphyses-like cells. Peridium comprising several layers of brown to dark brown cells of textura angularis. Hamathecium composed of cylindrical, septate, branching pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, cylindric-clavate, straight or slightly curved, apically rounded, pedicellate. Ascospores overlapping, 1–2-seriate, initially hyaline to golden-yellow, uniseptate when immature, becoming golden-brown to brown at maturity, ellipsoid to broadly fusiform, muriform, 5–7-transversely septate, with 1–2-vertical septum, guttulate, slightly constricted at the central septum, straight or slightly curved, surrounded by hyaline gelatinous sheath observed clearly when mounted in Indian ink. Asexual morph: Conidiomata pycnidial, solitary, immersed to semi-immersed in the host surface, uniloculate, globose, yellowish brown to brown. Pycnidial wall comprising 4–5 layers of thick-walled, dense, yellowish brown to brown cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells phialidic, ampulliform to cylindrical, hyaline, unbranched. Conidia ellipsoid to broadly fusiform, muriform, 5–7-transversely septate, with 1–2-vertical septa, small guttule, not constricted at the septa, yellowish brown to brown, with polar appendages, observed clearly when mounted in Indian ink (adapted from Mapook et al. 2020).
Type species: Murichromolaenicola chromolaenae Mapook & K.D. Hyde
Notes: Murichromolaenicola is characterised by semi-immersed to superficial, solitary or scattered ascomata, fissitunicate, cylindric-clavate asci, and overlapping, 1–2-seriate, initially hyaline to golden-yellow, uniseptate ascospores. Murichromolaenicola can be differentiated from similar genera based on DNA sequence data. Murichromolaenicola is morphologically and phylogenetically a distinct genus in Phaeosphaeriaceae. Molecular markers available for Murichromolaenicola include ITS, LSU, SSU and TEF-1.
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