Paravamsapriya Samarak. & K.D. Hyde, in Samarakoon, Hyde, Maharachchikumbura, Stadler, Gareth Jones, Promputtha, Suwannarach, Camporesi, Bulgakov & Liu, Fungal Diversity 112: 48 (2022)
Xylariomycetidae, Xylariales, Vamsapriyaceae, Paravamsapriya
Index Fungorum number: IF 558726; Facesoffungi number: FoF 10205; 1 morphological species; 1 species with sequence data
Saprobic on dead bamboo branches. Sexual morph: Ascomata immersed, visible as black, circular dots, with a depressed yellowish brown ring covering a clypeus-like black margin around the ostiolar opening, solitary, scattered, in cross-section subglobose. Ostioles centric, ostiolar canal periphysate. Peridium multi-layered, easily detached from the host with yellow inner substrate; outer layer comprising yellowish brown, thick-walled, compact cells of textura angularis; inner layer composed of hyaline, thin-walled cells of textura angularis. Paraphyses long, septate. Asci 8-spored, unitunicate, cylindrical, short-pedicellate, with a flattened, J−, apical ring in Melzer’s reagent, apex rounded. Ascospores uniseriate or overlapping uniseriate, hyaline, ellipsoidal to fusiform, aseptate, lacking germ slits. Asexual morph: Undetermined (copied from Samarakoon et al. 2022).
Type species: Paravamsapriya ostiolata Samarak. & K.D. Hyde, in Samarakoon, Hyde, Maharachchikumbura, Stadler, Gareth Jones, Promputtha, Suwannarach, Camporesi, Bulgakov & Liu, Fungal Diversity 112: 50 (2022)
Notes: Paravamsapriya is similar to Vamsapriya in having immersed ascomata with clypei, periphysate ostiolar canals, a peridium with compact cell layers, septate paraphyses, short-pedicellate, cylindrical asci and ascospores lacking a germ slit. There are distinct morphologies in Paravamsapriya such as distinct yellow and black margin on the host surface around the ostioles, an easily detachable peridium, and aseptate ascospores. Capsulospora is characterised by clypeate, immersed ascomata and aseptate, hyaline ascospores similar to Paravamsapriya, but differs in having ascospores covered with mucilaginous sheath, some with germ slits (e.g., C. borneoensis) and asci with discoid, J+ apical ring (Hyde 1996, Fröhlich and Hyde 2000). Hyde (1996) introduced Arecomyces to accommodate physalospora-like species with immersed ascomata under a clypeus or pseudostroma, broad cylindrical asci with a refractive apical ring and aseptate, hyaline ascospores covered with a mucilaginous sheath, which are different from Paravamsapriya. Sabalicola is also different from Paravamsapriya in having asci with J+, apical ring and yellowish ascospores with a thin mucilaginous sheath and blunt polar appendages (Hyde 1995). Based on the distinct morphology and phylogeny, the new genus Paravamsapriya is introduced (copied from Samarakoon et al. 2022).
Species illustrated in this entry:
Paravamsapriya ostiolata Samarak. & K.D. Hyde
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