Calocline Syd., Annls mycol. 37(4/5): 417 (1939)
Ascomycota, genera incertae sedis
Parasitic on Chusquea serrulata (Poaceae). Sexual morph: undetermined. Asexual morph: Conidiomata dark brown, loosely aggregated into a linear row between veins, pycnidial, immersed to superficial, ampulliform, unilocular, glabrous. Ostiole circular, centrally located. Conidiomatal wall composed of thick-walled, very pale brown to hyaline cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells hyaline, enteroblastic, phialidic, doliiform to lageniform, determinate, smooth-walled, with periclinal thickening at collarette zone. Conidia hyaline, oval to cylindrical, unicelullar, smooth-walled (Sutton 1980, Morgan-Jones 1977).
Type species: Calocline chusqueae Syd., Annls mycol. 37(4/5): 417 (1939)
Notes: Calocline is a monotypic genus. Calocline chusqueae has been reported as a pathogen on leaves of Chusquea serrulata (Poaceae), causing lenticular lesions (Sutton 1980). This genus shares a similar form of conidiomata, conidiogenous cells and conidia with Phoma. Calocline and Phoma are probably congeneric. However, Phoma is a polyphyletic genus; no molecular data is available for Calocline. Therefore fresh collections of type species are needed to clarify the taxonomy of Calocline.
Distribution: Ecuador (Sutton 1980).
Calocline chusqueae (redrawn from Sutton 1980) a Vertical section of conidioma. b Conidiogenous cells and developing conidia. c 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.