Obliquifusoideum W. Dong, Doilom and K.D. Hyde

Index Fungorum number: IF558198; Facesoffungi number: FoF 09875

Etymology – in reference to its neck growing oblique to the host substrate and fusoid ascospores

Saprobic on decaying wood submerged in freshwater.  Sexual morph Ascomata superficial, ellipsoidal, black, coriaceous, ostiolate, with a lateral neck. Necks hyaline to dark, subcylindrical, oblique or horizontal to the host substrate. Peridium thin, soft, comprising several layers of brown, thin-walled cells of textura angularis. Paraphyses tapering towards the apex, dense, hypha-like, septate, unbranched, hyaline. Asci 8-spored, unitunicate, cylindrical, short pedicellate, with a small, refractive, barrel- or jar-shaped, apical ring, persistent. Ascospores uniseriate, fusoid, septate, hyaline, thin-walled. Asexual morph undetermined.

Type speciesObliquifusoideum guttulatum W. Dong, Doilom and K.D. Hyde

Notes – The BlastN search of NCBIs GenBank using LSU sequence shows Obliquifusoideum guttulatum has the closest hits with several genera in Pleurotheciaceae, but with low percentage similarity, i.e., Melanotrigonum ovale (CBS 138743, similarity = 92.06%), Pleurotheciella saprophytica (MFLUCC 16-1251, similarity = 92.03%), Phaeoisaria annesophieae (MFLU 19-0531, similarity = 91.86%) and Sterigmatobotrys rudis (DAOM 229838, similarity = 91.83%). The closest hits using SSU sequence are several genera in Pleurotheciaceae, i.e., Dematipyriforma aquilaria (3-11-1, similarity = 98.13%), Phaeoisaria clematidis (MFLUCC 18-1017, similarity = 97.99%) and P. fasciculata (DAOM 230055, similarity = 97.92%). The closest hits using ITS sequence are however several genera in Conioscyphales and Pleurotheciales, i.e., Pleurothecium recurvatum (DAOM 230069, similarity = 98.75%), Conioscypha varia (CBS 604.70, similarity = 94.89%) and Neomonodictys muriformis (MFLUCC 16-1136, similarity = 93.19%).