Cytosporella
Cytosporella Sacc., Syll. fung. (Abellini) 3: 251 (1884)
Ascomycota, genera incertae sedis
Saprobic or parasitic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata dark brown, pycnidial, solitary, immersed to semi-immersed, pulvinate, multilocular, convoluted, glabrous. Ostiole absent, dehiscence by breakdown of the upper wall. Conidiomatal wall composed of thick-walled, dark brown to black cells of textura angularis in the exterior, becoming thick-walled, brown to paler cells of textura intricata towards locular wall. Conidiophores arising from inner layers of conidiomata, hyaline, cylindrical, branched, septate, smooth-walled, with acropleurogenous conidia. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical to doliiform, integrated or discrete, indeterminate, smooth-walled, often formed from lateral branches immediately below transverse septa, with a minute apical channel and collarette. Conidia hyaline, ellipsoidal, unicellular, smooth-walled, eguttulate (Sutton 1980).
Type species: Cytosporella sycina (Sacc.) Sacc., Syll. fung. 3: 251 (1884)
Notes: More than 60 Cytosporella epithets are listed in Index Fungorum (2019). The convoluted conidiomata in Cytosporella resembles Cytospora. The latter has allantoid conidia, which differs from the ellipsoidal conidia in Cytosporella. Wijayawardene et al. (2017b) placed Cytosporella in Gnomoniaceae (Diaporthales, Sordariomycetes). There is no molecular data available for type species, C. sycina. To clarify the taxonomy of Cytosporella, the type species will have to be recollected, and epitypified, so that authentic cultures and DNA barcodes will become available to fix the genetic concept.
Distribution: Brazil, Cuba, Cyprus, Czechia, Dominican Republic, France, Germany, Hungary, India, Italy, New Zealand, Pakistan, Portugal, Russian, Spain, South Africa, Sweden, Switzerland, USA (https://www.gbif.org/).
Cytosporella sycina (redrawn from Sutton 1980) a Conidia. b Conidiophores, conidiogenous cells and developing conidia. c Vertical section of conidioma.
References:
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.
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