Pleosporales » Lophiotremataceae

Cryptoclypeus

Cryptoclypeus A. Hashim. & Kaz. Tanaka, in Hashimoto et al., Persoonia 39: 63 (2017).

 Index Fungorum number: IF 819245; Facesoffungi number: FoF 08288, 2 morphological species (Species Fungorum 2022), 2 species with molecular data.

Saprobic on dead twigs of bamboo. Sexual morph: Ascomata solitary to grouped, immersed. Ostiolar neck crest-like, elongated, laterally compressed, with a slit-like ostiole and less-developed clypeus. Peridium composed of rectangular, thin-walled, pale brown cells. Pseudoparaphyses septate, branched and anastomosed. Asci bitunicate, fissitunicate, cylindrical, 8-spored. Ascospores fusiform, multiseptate, hyaline, smooth. Asexual morph: Conidiomata pycnidial, globose to subglobose, grouped, immersed, ostiolate. Peridium composed of subglobose to rectangular, brown cells. Conidiophores absent. Conidiogenous cells phialidic, ampuliform to cylindrical. Conidia cylindrical with slightly angular ends, hyaline, smooth, uniseptate (adapted from Hashimoto et al. 2017).

 Type species: Cryptoclypeus ryukyuensis A. Hashim. & Kaz. Tanaka

Notes: Cryptoclypeus is characterised by solitary to grouped ascomata, crest-like, elongated, laterally compressed ostiolar neck, cylindrical, 8-spored asci, and fusiform, multiseptate, hyaline, smooth ascospores. The asexual morph is characterised by globose to subglobose, grouped, immersed, ostiolate conidiomata, phialidic, ampliform to cylindrical conidiogenous cells, and hyaline, cylindrical conidia with slightly angular ends. Cryptoclypeus is unique in having an ascomata with a poorly-developed clypeus and a peridium comprising rectangular cells. Cryptoclypeus resembles Tetraploa (Tetraplosphaeriaceae) in having an ascomata with a clypeus and narrowly fusiform ascospores (Tanaka et al. 2009) but can be differentiated in having a well-developed neck with a slit-like ostiole. Cryptoclypeus also resembles Bambusicola (Bambusicolaceae) in having a similar asexual morph but can be differentiated in that the former has phialidic conidiogenous cells compared to annellidic ones in Bambusicola (Dai et al. 2012). The ideal molecular markers to differentiate among species of Cryptoclypeus are ITS, RPB2 and TEF1. Cryptoclypeus is a morphologically and phylogenetically distinct genus in Lophiotremataceae. Molecular markers available for Cryptoclypeus are ITS, LSU, SSU, RPB2 and TEF-1.

 

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