Pleosporales » Lentitheciaceae

Halobyssothecium

Halobyssothecium Dayarathne, E.B.G. Jones & K.D. Hyde, in Dayarathne et al., Mycol. Progr.: 10.1007/s11557-018-1432-3, [5] (2018).

 Index Fungorum number: IF 554756; Facesoffungi number: FoF 03928, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on salt marsh halophytes in marine habitats. Sexual morph: Ascomata subglobose or ellipsoidal, immersed to semi-immersed, scattered, ostiolate, carbonaceous, dark brown to black, gregarious. Peridium 30–45 μm, comprising two layers: outer layer of brown pseudoparenchyma; inner layer of elongated, hyaline cells. Pseudoparaphyses septate, branched. Asci 8-spored, clavate to subcylindrical, short pedicellate, thick-walled, without an apical apparatus. Ascospores versicolored, end cells hyaline, central cells brown, septate, and constricted at the septa, slightly curved. Asexual morph: Unknown (adapted from Dayarathne et al. 2018).

Type species: Halobyssothecium obiones (M.E. Barr) Dayarathne, E.B.G. Jones & K.D. Hyde

Notes: Halobyssothecium resembles genera of Lentitheciaceae in having scattered, immersed to semi-immersed ascomata, pedicellate asci and bi-seriate, septate ascospores which are constricted at the septum. Halobyssothecium is unique in having versicolored ascospores with brown central cells and hyaline end cells. Molecular markers available for Halobyssothecium include LSU, SSU, ITS, RPB2 and TEF-1.

 

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