Dothideomycetes » Dothideomycetes, genera incertae sedis

Anguillosporella

Citation: Pem D et al. (2019) Mycosphere Notes 275-324: A morphotaxonomic revision and typification of obscure Dothideomycetes genera (incertae sedis). Mycosphere 10(1), 1115–1246

 

Anguillosporella U. Braun, Monogr. Cercosporella, Ramularia Allied Genera (Phytopath. Hyphom.) 1: 233 (1995)

Parasitic on the surface of living leaves. Sexual morph: Undetermined. Asexual morph: Thyriothecia forming amphigenous, subcircular to irregular immarginate, flat, dark brown spots, sparsely scattered or not entirely distributed on surface of leaves. Conidiophores straight or slightly curved, brown, vermiform, curved, sigmoid or flexuose, pluriseptate, thick-walled, with terminal cell reduced to conidiogenous cells. Conidiogenous cells holoblastic, brown, smooth, obpyriform. Conidia solitary, conglobate, hyaline when immature, brown when mature, 1-septate, strongly constricted at the septum, thick-walled.

 

Type species – Anguillosporella vermiformis (Davis) U. Braun

 

Notes – The genus Anguillosporella was introduced by Davis (1995) with Anguillosporella vermiformis as the type species, found on Alnus (Betulaceae) in North America. Sexual morph of this genus is unknown. Anguillosporella is characterized by flat, dark brown spots or colonies, vermiform conidiophores, holoblastic conidiogenous cells and conglobate brown conidia. Redhead and White (1985) referred A. vermiformis as a phytopathogenic taxon. Wijayawardene et al. (2014) referred Anguillosporella to Dothideomycetes genera incertae sedis. Videira et al. (2017) examined the lectotype of A. vermiformis and morphologically treated the genus in Mycosphaerellaceae but could not resolve the phylogenetic position of the taxa. Currently the genus comprises two species, Anguillosporella coryli (Redhead & G.P. White) U. Braun and Anguillosporella vermiformis (Davis) U. Braun. We re-examined the type specimen of A. vermiformis from S herbarium (F4817) in which the conidiophores are seen as macronematous, vermiform, septate and conidiogenous cells as holoblastic. Therefore, we suggest that this genus should be retained in Dothideomycetes genera incertae sedis. The fungus should be recollected and fresh materials must be re-examined.

 

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