Hydeopsis
Hydeopsis J.F. Zhang, J.K. Liu & Z.Y. Liu, in Zhang et al., Mycosphere 8(1): 211 (2019).
Index Fungorum number: IF 556247; Facesoffungi number: FoF 05381, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.
Saprobic on dead culms of herbaceous plant. Sexual morph: Ascomata immersed, scattered, solitary, subglobose, dark brown to black, coriaceous, ostiolate. Hamathecium comprising numerous, hypha-like, cellular pseudoparaphyses, anastomosing between and among the asci. Asci clavate, 8-spored, bitunicate, fissitunicate, pedicellate, with a furcate pedicel at the base, rounded to truncate at the apex, with a developed ocular chamber. Ascospores ellipsoidal to fusiform, hyaline to pale pigmented, aseptate when young, and become septate at maturation, constricted at the median septum, surrounded by a mucilaginous sheath. Asexual morph: Unknown (adapted from Zhang et al. 2019).
Type species: Hydeopsis verrucispora J.F. Zhang, J.K. Liu & Z.Y. Liu
Notes: Hydeopsis is characterised by immersed, scattered, solitary, subglobose, dark brown to black ascomata, clavate, 8-spored, bitunicate, fissitunicate, pedicellate asci, and ellipsoidal to fusiform, hyaline to pale pigmented ascospores surrounded by a mucilaginous sheath. Hydeopsis is phylogenetically closely related to Dactylidina. Hydeopsis resembles Dactylidina in having globose or subglobose, glabrous ascomata, cylindrical to clavate asci but Hydeopsis has 3-septate, fusiform ascospores, while Dactylidina has muriform ascospores with 5–6-transverse septate and 1-longitudinal septum (Wanasinghe et al. 2018). Hydeopsis is a distinct and clearly defined genus in Phaeosphaeriaceae. Molecular markers available for Hydeopsis are ITS, LSU, SSU and TEF-1.
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