Dothideomycetes » Dothideomycetes, genera incertae sedis

Excipulariopsis

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

 

Excipulariopsis P.M. Kirk & Spooner, in Spooner & Kirk, Trans. Br. mycol. Soc. 78(2): 251 (1982)

Saprobic on decayed wood with corticeaceous fungus. Sexual morph: formerly known in Kentingia. Asexual morph: Mycelium mostly immersed. Conidiomata superficial, pulvinate, dark-brown to black, setiferous, with basal aggregation of thick-walled, dark brown cells. Setae straight or flexuous, peripheral, arising directly from cells of the basal stroma, subulate, dark brown, septate, thick-walled, smooth, with a pointed apex. Conidiophores micronematous, short, cylindrical, pale-brown, unbranched. Conidiogeneous cells holoblastic, monoblastic, integrated, terminal, and determinate. Conidia acrogenous, solitary, dry, broadly fusoid, truncate at the base, multiseptate, thick and smooth-walled, dark-brown, with hyaline to very pale brown terminal cells.

 

Type species – Excipulariopsis narsapurensis (Subram.) Spooner & P.M. Kirk

 

Notes Excipulariopsis was introduced by Spooner & Kirk (1982) for Excipularia narsapurensis found on decayed wood in the USA. Subsequently, Ellis (1976) presented an expanded generic description and illustrated E. narsapurensis Subram., found on unidentified wood and bark in India (Subramanian 1971). This species, rather than the holotype, was used by both Barnett & Hunter (1972) and Carmichael et al. (1980) to illustrate the genus. The major morphological characters of the genus are the non-falcate, thick-walled, septate conidia and consistently thick-walled, dark brown, subulate setae at the periphery of a non-cupulate conidioma arising directly from the basal stroma. The sexual morph was formerly known in Kentingia. Unfortunately, the taxonomic position of Excipulariopsis remains unresolved as cultures and sequences are unavailable. The genus Excipulariopsis in retained in Dothideomycetes genera incertae sedis.

 

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