Zunura Nag Raj, Coelomycetous Anamorphs with Appendage-bearing Conidia: 1006 (1993)
Ascomycota, genera incertae sedis
Parasitic on living leaves of Carpinus viminea (Betulaceae). Sexual morph: undetermined. Asexual morph: Conidiomata black, acervular, initially immersed, ultimately erumpent, unilocular, glabrous. Ostiole absent, dehiscence by irregular rupture of the overlapping host tissue. Conidiomatal wall composed of thick-walled, pale brown cells of textura angularis in the base part. Conidiophores reduced to conidiogenous cells. Conidiogenous cells arising from the upper cells of basal stroma, pale brown at the base, become paler above, enteroblastic, annellidic, ampulliform, discrete, indeterminate, smooth-walled. Conidia hyaline, globose to ellipsoidal, with narrow and truncate base, unicellular, smooth-walled, bearing single, tubular, unbranched apical appendage (adapted from Nag Raj 1993).
Type species: Zunura appendiculata (B. Sutton) Nag Raj, Coelomycetous Anamorphs with Appendage-bearing Conidia: 1009 (1993)
Notes: Zunura is a monotypic genus. This genus is similar to the asexual morph of Diplocarpon (= Entomosporium) and Monostichella in having immersed to erumpent, acervular conidiomata producing hyaline conidia. Monostichella was separated from the other two genera by its ellipsoid to pyriform, slightly curved conidia lacking an appendage, and enteroblastic, phialidic conidiogenous cells (Sutton 1980, Nag Raj 1993). Zunura has unicellular, globose to ellipsoidal conidia with single, tubular, unbranched apical appendage, which differs from the asexual morph of Diplocarpon in which the conidia are cruciform, 4-celled, occasionally 3–6-celled, bearing single apical appendage at each end of apical and lateral cell except basal cell (Nag Raj 1993). There is no molecular data available for Zunura. To clarify the taxonomy of Zunura, fresh collections and sequence data of the type species are needed.
Distribution: India (Nag Raj 1993).
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.