Rhodesia
Rhodesia Grove, British Stem- and Leaf-Fungi (Coelomycetes) 2: 205 (1937)
Facesoffungi number: FoF 07576
Ascomycota, genera incertae sedis
Habit on leaves and stems of Ammophila arenaria (Poaceae) (Sutton 1980). Sexual morph: undetermined. Asexual morph: Conidiomata brown, acervular, solitary to gregarious, subepidermal, immersed, elongate to subglobose in section view, unilocular, glabrous. Ostiole absent, dehiscence by irregular rupture of the overlapping tissue. Conidiomatal wall composed of pale brown cells of textura angularis in the basal part. Conidiophores arising from the inner wall layer of basal stroma, hyaline, cylindrical, branched, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical, integrated or discrete, determinate, smooth-walled, with minute channel and evident collarette, periclinal wall thickened. Conidia hyaline, oval, tapered to apex, slightly truncate at the base, unicellular, smooth-walled, guttulate (adapted from Sutton 1980).
Type species: Rhodesia subtecta (Roberge ex Desm.) Grove, British Stem- and Leaf-Fungi (Coelomycetes) 2: 205 (1937)
Notes: Only one species was accepted by Index Fungorum (2019) and Sutton (1980), but Wijayawardene et al. (2017b) estimated two species in the genus. Rhodesia is similar to Asteroma in having acervular conidiomata and phialidic, cylindrical conidiogenous cells. The oval conidia in Rhodesia differs from those in Asteroma that are cylindrical to fusiform and acicular or even more broadly fusiform (Sutton 1980). The genus has never been studied by molecular data. Therefore, a fresh collection of the type species is needed to resolve its taxonomic placement.
Distribution: Germany (Sutton 1980).
Rhodesia subtecta (redrawn from Sutton 1980) a Conidia. 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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