Longipedicellata
Longipedicellata H. Zhang, K.D. Hyde & Jian K. Liu, in Zhang et al., Phytotaxa 247(2): 102 (2016).
Index Fungorum number: IF 551685; Facesoffungi number: FoF 02665, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on dead and submerged woody material in freshwater. Sexual morph: Ascomata lenticular, immersed, beneath a blackened pseudo clypeus, scattered or clustered, coriaceous, black to brown, sometimes ostiolate. Peridium comprising multi-layered, black to brown cells of textura angularis, outer layer somewhat carbonaceous, inner layer composed of subhyaline gelatinous cells, easy to break. Hamathecium comprising few, long, broad, transversely septate, branched, cellular pseudoparaphyses, surrounding asci and along the inner layer of peridium. Asci 8-spored, bitunicate, fissitunicate, clavate, long-pedicellate, thin-walled, with an ocular chamber. Ascospores 8-spored, bi-seriate, overlapping, ellipsoid, narrowly subfusiform, conical at apex, hyaline, with 1-transverse-septa, constricted at the septum, guttulate at the centre of each cell, surrounded by mucilaginous sheath. Asexual morph: Hyphomycetous. Colonies dark-brown to black, circular, effuse, with serrate margin. Mycelium composed of smooth, hyaline to dark brown, septate, branched hyphae, flexuous, slightly filiform on agar surface, septate, branched, thick-walled, smooth, pale brown, septate, integrated, terminal or sometimes intercalary, gangliar-type, smooth to verrucose, hyaline to pale brown, transformed into chlamydospores. Conidia chlamydosporous monilioid, in acropetal chains, doliiform, subglubose to oval, rough-walled, brown to reddish-brown (Adapted from Phukhamsakda et al. 2016).
Type species: Longipedicellata aptrootii (K.D. Hyde & S.W. Wong) H. Zhang, K.D. Hyde & J.K. Liu
Notes: Longipedicellata is characterised by lenticular, immersed ascomata, below a blackened pseudo-clypeus, fissitunicate, clavate, long-pedicellate asci and bi-seriate, overlapping, ellipsoid ascospores. The asexual morph is characterised by dark-brown to black, circular colonies with hyaline to dark brown, septate mycelium, and chlamydosporous monilioid conidia formed in acropetal chains. Longipedicellata aptrootii was previously known as Didymella aptrootii but was not congeneric with the type species of Didymella, D. exigua. Zhang et al. (2016) transferred Didymella aptrootii to Longipedicellata and placed the genus in Bambusicolaceae based on phylogenetic analysis. Phukhamsakda et al. (2016) introduced Longipedicellataceae to accommodate Longipedicellata based on morphology, phylogeny and divergence time estimates. Longipedicellata is morphologically and phylogenetically a distinct and type genus of Longipedicellataceae. Molecular markers available for Longipedicellata are LSU, SSU, ITS, TEF-1 and RPB2.
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