Neoamphisphaeria Samarak. & K.D. Hyde, in Samarakoon, Hyde, Maharachchikumbura, Stadler, Gareth Jones, Promputtha, Suwannarach, Camporesi, Bulgakov & Liu, Fungal Diversity 112: 23 (2022)
Xylariomycetidae, Amphisphaeriales, Appendicosporaceae, Neoamphisphaeria
Index Fungorum number: IF 558714; Facesoffungi number: FoF 10190; 1 morphological species; 1 species with sequence data
Saprobic on dead twigs. Sexual morph: Ascomata immersed, slightly raised, visible as black dots, solitary, in cross-section conical with a mostly flattened base or less globose. Ostioles centric, filled with white amorphous tissue. Peridium multi-layered; outer layer comprising reddish brown, thick-walled cells of textura angularis, inner layer composed of hyaline, thin-walled cells of textura angularis. Paraphyses wider at the base, long, septate, branched. Asci 8-spored, unitunicate, cylindrical, short pedicellate, with a bi-lobed or dome-shaped apical ring, J− in Melzer’s reagent, apically rounded. Ascospores uniseriate, hyaline, broadly ellipsoidal, aseptate when immature, 1-septate when mature, guttulate, lacking a mucilaginous sheath. Asexual morph: Undetermined (copied from Samarakoon et al. 2022).
Type species: Neoamphisphaeria hyalinospora Samarak. & K.D. Hyde, in Samarakoon, Hyde, Maharachchikumbura, Stadler, Gareth Jones, Promputtha, Suwannarach, Camporesi, Bulgakov & Liu, Fungal Diversity 112: 25 (2022)
Notes: Neoamphisphaeria is similar to Amphisphaeria in having immersed ascomata with a brown peridium, long hyaline paraphyses, cylindrical asci and ellipsoid, 1-septate, mature ascospores. The distinct characters of Neoamphisphaeria are the ostiolar canal filled with amorphous hyaline cells, asci with a bi-lobed or dome-shaped apical ring and hyaline ascospores. In the phylogeny conducted by Samarakoon et al. (2022), Neoamphisphaeria clusters (100%/1.00 PP) with Appendicospora, which has a periphysate ostiolar canal, clavate asci and 2–3-seriate, hyaline, clavate ascospores with a bifurcated (moustache-shaped) appendage. With inconspicuous, immersed ascomata, asci with short or lacking pedicels with J−, apical ring and 2-celled hyaline ascospores and strong phylogenetic evidence, Neoamphisphaeria is accepted as a new genus in Appendicosporaceae (copied from Samarakoon et al. 2022).
Species illustrated in this entry:
Neoamphisphaeria hyalinospora Samarak. & K.D. Hyde