Sirozythiella Höhn., Sber. Akad. Wiss. Wien, Math.-naturw. Kl., Abt. 1 118: 1532 (1909)
Facesoffungi number: FoF 07594
Ascomycota, genera incertae sedis
Habit on leaves and culms of Phragmites communis (Poaceae). Sexual morph: undetermined. Asexual morph: Conidiomata dark brown, pycnidial, solitary, initially immersed, becoming erumpent, globose, unilocular, glabrous. Ostiole absent, opening by irregular splits of apical wall. Conidiomatal wall composed of outer layers of thick-walled, brown to pale brown cells of textura intricata at the base, becoming thick-walled, pale brown cells of textura angularis towards hymenium and upper part. Conidiophores arising from inner layer of basal and lateral wall of conidiomata, hyaline, cylindrical to subcylindrical, branched at the base and repeatedly above, septate, smooth-walled. Conidiogenous cells hyaline, hollothallic, cylindrical, integrated, indeterminate, smooth-walled. Conidia hyaline, arthric, long doliiform, truncate at both ends, except apical conidia which are subacute, 2-septate, straight or slightly curved, smooth-walled, eguttulate, formed by disarticulation of the conidiogenous cells from the conidiophore, produced in long, branched chains with the youngest conidia at the base (Sutton 1980).
Type species: Sirozythiella sydowiana (Sacc.) Höhn., Sber. Akad. Wiss. Wien, Math.-naturw. Kl., Abt. 1 118: 1532 (1909)
Notes: Sirozythiella remains monotypic. This genus is similar to Chondropodiella, Phacidiella and Phellostroma in having hollothallic, cylindrical conidiogenous cells, but it was separated from these genera by conidiomata and conidia form. These differences are discussed under notes of Phellostroma. No molecular data is available for Sirozythiella. Fresh collections are needed to place it in a natural group.
Distribution: Germany (Sutton 1980).
Sirozythiella sydowiana (redrawn from Sutton 1980) a Vertical section of conidioma. b Conidia. 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.