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

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 super- ficial, 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 species: Obliquifusoideum guttulatum W. Dong, Doilom and K.D. Hyde

Notes:  – The BlastN search of NCBIs GenBank using LSU sequence shows Obliquifu- soideum guttulatum has the closest hits with several genera in Pleurotheciaceae, but with low percentage similarity, i.e., Melanotrigonum ovale (CBS 138743, similarity = 92.06%), Pleurothe- ciella 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., Dematipyri- forma aquilaria (3-11-1, similarity = 98.13%), Phaeoisaria clematidis (MFLUCC 18-1017, similar- ity = 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., Pleu- rothecium recurvatum (DAOM 230069, similarity = 98.75%), Conioscypha varia (CBS 604.70, similarity = 94.89%) and Neomonodictys muriformis (MFLUCC 16-1136, similarity = 93.19%).