Fungalpedia – Note 2453, Crassiclypeus
Crassiclypeus. A. Hashim., K. Hiray. & Kaz.
Citation when using this data: Dong W et al. 2020 – Fungalpedia, Ascomycota.
Index Fungorum, Facesoffungi, MycoBank, GenBank
Classification: Lophiostomataceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on submerged dead twigs of woody plant. Sexual morph: Ascomata scattered to gregarious, immersed, subglobose, dark brown to black, ostiolate. Ostiolar neck crest-like, elongate, laterally compressed, surrounded by a well-developed clypeus. Peridium uniform, composed of elongate, brown cells, surrounded by brown hyphae. Pseudoparaphyses numerous, trabeculate, filiform, hyaline, septate, branching and anastomosing. Asci 8-spored, bitunicate, fissitunicate, clavate, pedicellate, apically rounded with an ocular chamber. Ascospores fusiform, hyaline, septate, smooth, with an internal chamber and a narrow sheath which drawn out at both ends (Hashimoto et al. 2018). Asexual morph: Coelomycetous. Conidiomata pycnidial, superficial to immersed, scattered or clustered in small groups, globose to subglobose. Peridium composed of subglobose to rectangular, brown cells. Conidiophores reduced to conidiogenous cells. Conidiogenous cells phialidic, ampliform, hyaline, smooth. Conidia subglobose with rounded ends, hyaline, aseptate, smooth (Hashimoto et al. 2018).
Notes: Crassiclypeus was introduced to accommodate the freshwater species C. aquaticus collected in Japan (Hashimoto et al. 2018). The asexual morph has subglobose conidia formed in culture (Hashimoto et al. 2018). Crassiclypeus aquaticus clusters basal to Flabellascoma with moderate bootstrap support. Crassiclypeus aquaticus shares similar morphological characters with F. fusiforme in having fusiform, hyaline ascospores with a narrow, bipolar sheath. However, an internal chamber was not observed in the ascospores of F. fusiforme (see description of
F. fusiforme below).
Type species: Crassiclypeus aquaticus A. Hashim., K. Hiray. & Kaz. Tanaka
Other accepted species: Species Fungorum – search Crassiclypeus.
References
Entry by
Wei Dong, Faculty of Agriculture and Food, Kunming University of Science and Technology, Kunming 650500, China, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Innovative Agriculture Research Center, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand, Institute of Plant Health, Zhongkai University of Agriculture and Engineering, Haizhu District, Guangzhou 510225, China
Published online 22 May 2026