Lentistoma
Lentistoma A. Hashim., K. Hiray. & Kaz. Tanaka, in Hashimoto et al., Stud. Mycol. 90: 169 (2018).
Index Fungorum number: IF 823136; Facesoffungi number: FoF 08277, 1 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on host. Sexual morph: Ascomata scattered, immersed, subglobose. Ostiolar neck elongated, laterally compressed, surrounded by a well-developed clypeus. Peridium composed of globose, brown cells. Pseudoparaphyses numerous, septate, branched and anastomosed. Asci bitunicate, fissitunicate, cylindrical-clavate, 8-spored. Ascospores fusiform, hyaline, uniseptate, with a narrow bipolar sheath. Asexual morph: Unknown (adapted from Hashimoto et al. 2018).
Type species: Lentistoma bipolare (K.D. Hyde) A. Hashim., K. Hiray. & Kaz. Tanaka
Notes: Lentistoma is characterised by scattered, immersed, subglobose ascomata, numerous, septate, branched pseudoparaphyses, cylindrical-clavate, 8-spored asci, and fusiform, hyaline, uniseptate ascospores. Lentistoma bipolare was previously known as Lophiostoma bipolare and was considered as a species of Massarina (Hyde 1995a). Lentistoma differs from Lophiostoma in having clypeus around the ostiolar neck and a thinner and uniformly thickened peridium. Liew et al. (2002) treated Lentistoma bipolare as a species in Lophiostoma based on phylogenetic analyses of ITS sequences. This placement was followed by other authors (Tanaka & Hosoya 2008, Hirayama & Tanaka 2011, Hyde et al. 2013). Thambugala et al. (2015) did not include Lo. bipolare in their phylogenetic analysis. Hashimoto et al. (2018) reported that, Lo. bipolare is distantly related to species of Lophiostoma sensu stricto. Lentistoma is a morphologically and phylogenetically a well-defined genus in Lophiostomataceae. Molecular markers available for Lentistoma are ITS, LSU, SSU, BTUB, RPB2 and TEF-1.
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