Ferreira, Vinicius S.Lima Silveira, Luiz Felipe2021-03-022021-03-022020-02Ferreira, Vinicius S., and Luiz Felipe Lima Silveira. “A New Suspected Paedomorphic Genus of Net-Winged Beetles from the Atlantic Rainforest (Coleoptera, Elateroidea, Lycidae).” Papéis Avulsos de Zoologia (February 28, 2020). doi:10.11606/1807-0205/2020.60.special-issue.35.1807-0205https://scholarworks.montana.edu/handle/1/16141Lycidae are among the better studied groups in the superfamily Elateroidea, however despite the progress in the taxonomic understanding of the Neotropical fauna, much still remains unknown and undescribed in the region. The description of the new genus Xenolycus gen. nov., from Serra dos Órgãos, a subrange of the Serra do Mar mountain range, in the Atlantic Rainforest in Rio de Janeiro State, Brazil, contributes to the knowledge of the Neotropical Lycidae fauna. The new genus can be distinguished from all other known Calopterini and Neotropical Lycidae by the combination of a pronotum with a wide, deep and strongly visible longitudinal cell in the disc area, the filiform antennae, the dehiscent elytra with reticulation strongly reduced and bearing only two weakly developed elytral costae and the mouthparts partially reduced, with rudimentary, barely visible mandibles. The type species, Xenolycus costae sp. nov., is illustrated and diagnostic characters and a discussion on the tribal placement of the new genus are provided.en-US© This published version is made available under the CC-BY 4.0 license.https://creativecommons.org/licenses/by/4.0Article