Ascomycota, genera incertae sedis
Saprobic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata dark brown, pycnidial, solitary, semi-immersed, oval to elongated, unilocular, glabrous. Ostiole absent, dehiscence by a longitudinal fissure of apical wall. Conidiomatal wall composed of thick-walled, dark brown cells of textura intricata to textura angularis. Conidiophores arising from the inner walls of the conidiomata, pale brown, branched, septate, rough-walled. Conidiogenous cells pale brown, holoblastic, doliiform or irregular, integrated, determinate, lateral or intercalary, rough-walled, with a minute apical channel and collarette. Conidia hyaline, cylindrical to ellipsoid, straight or slightly curved, 1-septate, constricted at septum, smooth-walled, eguttulate (Petch 1943, Sutton 1980).
Type species: Cystotricha striola Berk. & Broome, Ann. Mag. nat. Hist., Ser. 2 5: 457 (1850)
Notes: Cystotricha can be confused with Ceuthodiplospora, as they have hyaline, cylindrical to ellipsoid, septate conidia. Cystotricha differs from Ceuthodiplospora by its, pale brown, branched, septate, rough-walled conidiophores, and a feature absent in the latter. Sutton (1980) gave a full account of the taxonomy of Cystotricha, and accepted only the type species in the genus. The sexual morph of C. striola was considered to be Durella compressa (Pers.) Tul. & C. Tul. (Sutton 1980, Petch 1981), but this has not be confirmed by molecular data. Wijayawardene et al. (2017a) placed it in Ascomycota, genera incertae sedis. Fresh collections are required and DNA sequencing to place Cystotricha in a natural classification.
Distribution: Belgium, Estonia, Sweden, UK, (Sutton 1980, https://www.gbif.org/).
Cystotricha striola (redrawn from Sutton 1980) a Condia. b Vertical section of conidioma. c Conidiophores, conidiogenous cells and developing conidia.
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.