Eutiarosporella Crous, Phytotaxa 202(2): 85 (2015)
Facesoffungi number: FoF 07365
Dothideomycetes, order incertae sedis, Botryosphaeriales, Botryosphaeriaceae
Saprobic or parasitic on the host plant in terrestrial habitat, such as Celtis africana (Cannabaceae), Dactylis glomerata (Poaceae), Triticum aestivum (Poaceae), and Vachellia karroo (Fabaceae) (Dissanayake et al. 2016). Sexual morph: see Li et al. (2016). Asexual morph: Conidiomata pale brown to brown, stromatic, pycnidial, mostly epiphyllous, solitary to gregarious or often confluent, initially immersed, then becoming partly erumpent, globose to subglobose, unilocular or multilocular, glabrous, ostiolate. Ostiole single, funneled to flabellate, centrally located. Conidiomatal wall composed of pale brown to brown, thick-walled cells of textura angularis in the outer layers, and hyaline, thin-walled cells of textura prismatica in the inner layers. Conidiophores arising all around the cavity of the conidiomata, hyaline, branched, septate, invested in thin, non-persistent mucus. Conidiogenous cells enteroblastic, hyaline, subcylindrical to obclavate, discrete or integrated, smooth. Conidia hyaline, navicular with an obtuse apex and a narrow truncate base, aseptate, slightly curved, aguttulate, smooth-walled, bearing hyaline, branched, filiform, flexuous appendage at both ends.
Figure 1- Eutiarosporella tritici (redrawn from Li et al. 2020) a,b Vertical section of conidiomata. c Section of peridium. d Conidiogenous cells and developing conidia. e Conidia. Scale bars: a = 100 µm, b = 200 µm, c = 50 µm, d,e = 10 µm.
Notes: Sutton and Marasas (1976) described Tiarosporella tritici based on its large conidia and pulvinate conidiomata. Crous et al. (2015b) showed that T. africana, T. tritici, and T. ubis-rosarum clustered apart from Tiarosporela sensu stricto and formed a well-supported clade in Botryosphaeriaceae. In accordance with its distinct phylogeny, they introduced a new genus Eutiasporella to accommodate these three species. Li et al. (2016) added E. dactylidis with sexual morph in Eutiarosporella. We re-examined the holotype of E. tritici and found that the conidia also bear a basal appendage which is evanesced at maturity. We provide additional morphological details of conidia and conidiomatal structure, which were not available previously (Sutton and Marasas 1975, Sutton 1980, Nag Raj 1993, Crous et al. 2015b). Seven species, i. e. T. africana, E. dactylidis, E. darliae, T. tritici, E. tritici-australis, T. ubis-rosarum, and E. pseudodarliae, are accepted in Eutiarosporella (Crous et al. 2015b, Thynne et al. 2015, Dissanayake et al. 2016).
Distribution: Australia, Italy, South Africa (Crous et al. 2015b, Thynne et al. 2015, Li et al. 2016).
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.