Davisiella
Davisiella Petr., Annls mycol. 22(1/2): 134 (1924)
Ascomycota, genera incertae sedis
Fungicolous, parasitic in the locules of Phyllachora on Poaceae (Greene 1949). Sexual morph: undetermined. Asexual morph: Conidiomata hyaline, either enclosed by perithecia or immersed in clypear tissue of Phyllachora, pycnidial, solitary, rarely aggregated, globose to pyriform, unilocular, glabrous. Ostiole single, circular, centrally located. Conidiomatal wall composed thick-walled, hyaline cells of textura angularis. Conidiophores lining all around the cavity of conidiomata, hyaline, cylindrical to lageniform, branched, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical to doliiform, integrated to discrete, determinate, smooth-walled, with terminal or lateral apertures formed immediately below septa. Conidia hyaline, fusiform to cylindrical or irregular in shape, with rounded apex and truncate base, straight or curved, 2–3-septate, smooth-walled, guttulate (Sutton 1980).
Type species: Davisiella elymina (Davis) Petr., Annls mycol. 22(1/2): 134 (1924)
Notes: Sutton (1980) revised Davisiella and accepted three species in the genus. Davisiella is characterized by its fungicolous habit (Sutton 1980, Sun et al. 2019). Davisiella domingensis was recorded from several Phyllachora species on different grasses in Dominica (Petrak and Ciferri 1932, Cole and Kendrick 1981). Davisiella botryodiplodiae was described from conidiomata of Botryodiplodia theobromae Pat. (Ahmad 1961), while D. elymina was described from Phyllachora on Muhlenbergia racemosa (Poaceae) in the USA (Sutton 1980). No molecular data is available for Davisiella.
Distribution: Dominican Republic, Pakistan, USA.
Davisiella elymina (redrawn from Sutton 1980) a Condia. 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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