Strasseria Bres. & Sacc., in Strasser, Verh. zool.-bot. Ges. Wien 52: 436 (1902)
Facesoffungi number: FoF 07708
Ascomycota, genera incertae sedis
Parasitic on the host plant. Sexual morph: undetermined. Asexual morph: Conidiomata dark brown to black, stromatic, pycnidial, solitary to gregarious, immersed, globose, subglobose or irregular, unilocular or multilocular, glabrous, ostiolate. Ostiole circular, papillate, centrally located. Conidiomatal wall composed of thick-walled, dark brown cells of textura angularis in the basal and lateral part, gradually merging with thin-walled, pale brown cells of textura prismatica in the middle part of locular wall, becoming thicker and darker towards ostiolar region. Conidiophores arising from inner layers of each locular wall, hyaline, cylindrical to doliiform or irregular, branched, septate, invested in mucus. Conidiogenous cells hyaline, enteroblastic, phialidic, cylindrical to lageniform, integrated or discrete, determinate, smooth-walled, with a minute channel and collarette. Conidia hyaline, allantoid to botuliform, with obtuse apex and truncate base, bearing a single, filiform, flexuous, unbranched, often oblique appendage at base, and a mucoid, infundibuliform appendage at apex (adapted from Sutton 1980, Nag Raj 1993).
Type species: Strasseria carpophila Bres. & Sacc., in Strasser, Verh. zool.-bot. Ges. Wien 52: 436 (1902)
Notes: In Eleutheromyces, Monodia, Nothostrasseria, Pullospora, Strasseria, Strasseriopsis, the formation of the basal, cellular appendages precede the development of the conidia body (Nag Raj 1983, 1993). The pale brown to brown, verruculose-walled conidia in Nothostrasseria separate it from other genera that have hyaline, smooth-walled conidia. Strasseria possesses both cellular and mucoid appendages, whereas Eleutheromyces, Monodia, Pullospora, and Strasseriopsis have only cellular appendages. Strasseriopsis was separated from Monodia and Pullospora on the basis of the shape of the conidia, the numbers of conidial appendage, and the structure of the conidiomata. Monodia and Pullospora are coprophilous fungi, and the differences among these genera are discussed under Monodia.
Strasseria is a monotypic genus, although Sutton (1980) estimated eight species in Strasseria. Nag Raj (1983) made a comprehensive revision of Strasseria, and accepted the single species, S. geniculata (Berk. & Broome) Höhn. Other species were transferred to Phyllosticta Pers. and Apostrasseria Nag Raj or excluded from Strasseria. Strasseria carpophila was listed as a synonym of S. geniculata by Sutton (1980) and Nag Raj (1983). However, Wijayawardene (2017) considered S. carpophila to be an earlier name, and selected it as type species. This species is associated with branch and twig cankers and necrotic needles, black rot and blackened, necrotic tissue on various hosts (Nag Raj 1993). To clarify the taxonomy of Strasseria, the type species will have to be recollected, and epitypified.
Distribution: Austria, Canada, Netherlands, UK, USA (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.