Tenuiappendicula Senan., Camporesi & K.D. Hyde, Mycosphere 8(1): 207 (2017)
Index Fungorum number: IF552728; 1 species with sequence data.
Etymology: Name comprising two Latin words “tenuis” and “appendicula”, referring to the slender ascospore appendages.
Saprobic on branches Alnus cordata (Loisel.) Duby. Sexual morph: Pseudostromata parenchymatous, comprising thin-walled, light brown cells of textura globosa. Ascomata aggregated, immersed, globose to subglobose, black, coriaceous, ostiolate, papillate. Papilla slanted to horizontal in the substrate, curved, asymmetrical, sometimes convergent, widening towards the apex, internally covered by hyaline, filamentous periphyses. Peridium comprising an outer, thick-walled, light brown layer of very few compressed layers of cells of textura angularis and the inner thin-walled, hyaline layer of compressed cells of textura angularis. Hamathecium aparaphysate. Asci 8-spored, unitunicate, fusiform to clavate, with short pedicel, apex blunt, lacking apical ring. Ascospores biseriate to overlapping biseriate, oval, 1-septate, thick-walled. Appendages at both ends, slender, long, hyaline. Asexual morph: Coelomycetous. Conidiomata acervuli, scattered, solitary, immersed, subglobose, unilocular, dark brown. Conidiomatal wall multi-layered, comprising thick-walled, brown, small cells of textura angularis. Conidiophores branched at the base, cylindrical, septate, hyaline, formed from the upper pseudoparenchyma, smooth-walled. Conidiogenous cellsholoblastic, terminal, discrete, with 1–2 percurrent proliferations, indeterminate, cylindrical, simple, hyaline, smooth-walled. Conidia cylindrical, narrowing towards ends, with small spine at upper end, (4)–5–(6)-septate, hyaline, sometimes guttulate, thick-walled.
Type species – Tenuiappendicula alnicola Senan., Camporesi & K.D. Hyde
Notes – Tenuiappendicula is characterized by 1-septate ascospores with long, thin appendages and asci without an apical ring.