Porosynnema catenatum gen. & sp. nov. from Yunnan, China

A new genus and species, Porosynnema catenatum , collected on decaying twigs of an unidentified broadleaf tree in Xishuangbanna, China, are described and illustrated. The genus is characterized by macronematous, unbranched conidiophores forming distinct, indeterminate synnematal conidiomata with polytretic, integrated, terminal, cylindrical, cicatrized, determinate or percurrently extending conidiogenous cells that produce acropleurogenous, catenate, obclavate, distoseptate conidia with a thick, dark hilum at the base. A key to Porosynnema and its morphologically similar genera is provided.