Fungalpedia – Note 1471, Chaetasbolisia
Chaetasbolisia. Speg.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Didymellaceae, Pleosporales, Pleosporomycetidae, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Saprobic on the host plant in terrestrial habitat. Sexual morph: undetermined. Asexual morph: Conidiomata dark brown, pycnidial, scattered, superficial, globose, unilocular, setose, ostiolate. Ostiole circular, centrally located. Conidiomatal setae brown, subulate, with acute apex, unbranched, septate, straight or curved, thick-walled, irregularly verrucose. Conidiomatal wall composed of thin-walled, brown cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells arising from the innermost wall cells of the conidiomata, hyaline, enteroblastic, phialidic, doliiform to ampulliform, determinate, smooth-walled, with minute channel and collarette. Conidia hyaline, oval, with rounded ends, unicellular, smooth-walled, guttulate (Sutton 1980)
Notes: Chaetasbolisia shares similar characters with Chaetosticta in having pycnidial, setose conidiomata, and phialidic conidiogenous cells, but is distinguished by its conidia form. Seven taxa have been accepted in Chaetasbolisia, but apart from the type species,
C. erysiphoides on leaves of Photinia loriformis (Rosaceae), the other taxa have never been restudied (Batista and Ciferri 1963, Sutton 1980, Wijayawardene et al. 2017b). De Gruyter et al. (2009) and Aveskamp et al. (2010) recognized Chaetasbolisia was a member of Didymellaceae based on molecular data of a reference strain (CBS 148.94). Chen et al. (2015) revised Didymellaceae based onmulti-gene sequence of LSU, ITS, rpb2 and tub2, and excluded Chaetasbolisia. Chaetasbolisia should be restudied based on epitype and new collections.
Type species: Chaetasbolisia erysiphoides (Griffon & Maubl.) Griffon & Maubl., Physis, Rev. Soc. Arg. Cienc. Nat. 4(no. 17): 293 (1918).
Figure 1 – Chaetasbolisia erysiphoides (redrawn from Sutton 1980) a Surface view of a conidioma. b Conidia. c Conidiogenous cells and developing conidia. d Conidiomatal seta.
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.