Pleosporales » Lophiostomataceae


Pseudolophiostoma Thambug., Kaz. Tanaka & K.D. Hyde, in Thambugala et al., Fungal Diversity: 10.1007/s13225-015-0348-3, [37] (2015).

 Index Fungorum number: IF 551250; Facesoffungi number: FoF 00820, 4 morphological species (Species Fungorum 2022), 4 species with molecular data.

Saprobic on host. Sexual morph: Ascomata scattered, immersed, globose to subglobose. Ostiolar neck elongated, laterally compressed. Peridium composed of rectangular, dark brown to black 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: Pseudolophiostoma vitigenum (Kaz. Tanaka & Y. Harada) Thambugala, Kaz. Tanaka & K.D. Hyde

Notes: Pseudolophiostoma is characterised by scattered, immersed, globose to subglobose ascomata, elongated, a laterally compressed ostiolar neck, cylindrical-clavate, 8-spored asci, and fusiform, hyaline, uniseptate ascospores with a narrow bipolar sheath. Pseudolophiostoma vitigenum was previously known as Lophiostoma vitigenum. Tanaka and Harada (2003) considered Pseudolophiostoma vitigenum as a member of Lophiotrema while Hirayama and Tanaka (2011) showed that the former belongs to Lophiostoma based on SSU and LSU phylogenetic analyses. Thambugala et al. (2015) proposed the combination Pseudolophiostoma vitigenum based on combined phylogeny of LSU, SSU, ITS and TEF1α sequence dataset. Hashimoto et al. (2018) introduced three new species P. cornisporum, P. obtusisporum and P. tropicum from Japan. Pseudolophiostoma also resembles Lentistoma in having similar ascospores but differs in that the latter has a clypeated ostiolar neck which is lacking in Pseudolophiostoma. Pseudolophiostoma is morphologically and phylogenetically a well-defined genus in Lophiostomataceae. Molecular markers available for Pseudolophiostoma are ITS, LSU, SSU, RPB2 and TEF-1.


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