Pseudocoleophoma Kaz. Tanaka & K. Hiray., in Tanaka et al., Stud. Mycol. 82: 89 (2015)
Facesoffungi number: FoF 07534
Dothideomycetes, Pleosporomycetidae, Pleosporales, Dictyosporiaceae
Saprobic on the host plant or on submerged stems in freshwater or isolated from soil (De Gruyter et al. 2013, Tanaka et al. 2015, Hyde et al. 2016). Sexual morph: see Tanaka et al. (2015). Asexual morph: Conidiomata dark brown to black, pycnidial, solitary to gregarious or confluent, immersed to erumpent, globose to subglobose or ovoid, unilocular, glabrous, ostiolate. Ostiole single, cylindrical to sybcylindrical or obconic, centrally located. Conidiomatal wall composed of thick-walled, dark brown to brown then hyaline cells of textura angularis to textura prismatica. Conidiophores reduced to conidiogenous cells. Conidiogenous cells hyaline, enteroblastic, phialidic, doliiform, lageniform to subcylindrical, determinate, smooth-walled, formed in the inner cavity of conidiomata. Conidia hyaline, cylindrical to subcylindrical or fusiform, unicellular, smooth-walled.
Type species: Pseudocoleophoma calamagrostidis Kaz. Tanaka & K. Hiray., in Tanaka et al., Stud. Mycol. 82: 89 (2015)
Notes: Pseudocoleophoma was proposed by Tanaka et al. (2015) to accommodate P. calamagrostidis Kaz. Tanaka & K. Hiray. on dead leaves of Calamagrostis matsumurae and P. polygonicola Kaz. Tanaka & K. Hiray. on dead stems of a polygonaceous plant. The genus is characterized by immersed to erumpent, globose to depressed globose ascomata, fissitunicate, 8-spored, pedicellate asci and fusiform, 1-septate ascospores with a conspicuous sheath, pycnidial, subglobose conidiomata with a long, distinct ostiole, phialidic, doliiform to lageniform conidiogenous cells, and hyaline, cylindrical conidia (Tanaka et al. 2015). Hyde et al. (2016) added an additional species P. typhicola Kamolhan, Banmai et al. on submerged stems of Typha latifolia (Typhaceae) in freshwater from the UK. In this study, strain (MFLUCC 16-1444) collected from Ruscus sp. in Italy is introduced as a new species P. rusci on the basis of both morphology and phylogeny (see notes below). In addition, Paraconiothyrium flavescens, introduced by de Gruyter et al. (2013) based on Phoma flavescens Gruyter, Noordel. & Boerema clustered with Pseudocoleophoma species with high bootstrap support (99Ml/98Mp/1BB). Thus, a new combination Pseudocoleophoma flavescens is introduced to accommodate this species. Five species are accepted in Pseudocoleophoma.
Distribution: Italy, Japan, Netherlands, UK (de Gruyter et al. 2013, Tanaka et al. 2015, Hyde et al. 2016, this study).
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.