Two new microfungi from Brazilian Amazon Forest: Atrogeniculata submersa and Nigrolentilocus amazonicus

摘要

Atrogeniculata submersa gen. & sp. nov. and Nigrolentilocus amazonicus sp. nov., collected on the submerged decaying leaves of an unidentified plant, are described and illustrated. Atrogeniculata submersa is distinguished by macronematous geniculate conidiophores, mono- and polyphialidic integrated indeterminate conidiogenous cells, and solitary aseptate globose pyriform to broadly ellipsoid conidia that are at first subhyaline but mature to reddish-brown to dark brown and secede schizolytically on a collarette. Nigrolentilocus amazonicus is characterized by solitary acropleurogenous obclavate conidia that are 2-septate and brown below and subhyaline to pale brown at the apex.