Abstract

Phylloicus Müller, 1880 and Banyallarga Navás, 1916 are endemic Neotropical genera of Calamoceratidae. Currently, Phylloicus has 55 extant species, 19 of which are recorded from Brazil, and a fossil species from Dominican amber. In this paper, a new species of Phylloicus is described and illustrated from specimens collected in Amazonas State, Brazil. This new species has peculiar hind wing venation, with vein R4 attached basally to the base of R2+3. Therefore, a modified diagnosis to the genus is presented to include Phylloicus dumasi sp. nov. The new species is somewhat similar to P. paprockii Prather, 2003, but can be distinguished from these and other Phylloicus species by the atypical hind wing venation, uniform colouration, and male genitalia with tergum IX produced posteriorly into two wide lobes.

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