6533b826fe1ef96bd1284655

RESEARCH PRODUCT

Minutoexcipula tuckerae gen. et sp.nov., a new lichenicolous deuteromycete on Pertusaria texana in the United States

subject

description

The new deuteromycete genus and species Minutoexcipula tuckerae is described and illustrated from five collections on Pertusaria texana made in Louisiana. It is characterized by the formation of black convex sporodochia-like conidiomata which also have a well-differentiated exciple. The branched conidiophores bear proliferating holoblastic conidiogenous cells with distinct annellations, and the singly borne conidia are brown and 1-septate. The separation of the genus from Lichenopuccinia, Milospium, Monodictys, Sclerococcum, and Trimmatostroma is discussed. Notes on other brown-spored deuteromycetes known on Pertusaria are also included, together with a key to the nine currently known species.