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Article
Published: 2020-05-29

New species of Rivudiva Lugo-Ortiz & McCafferty (Ephemeroptera: Baetidae) with comments on R. minantenna Lugo-Ortiz & McCafferty and R. trichobasis Lugo-Ortiz & McCafferty

Museu de Entomologia, Depto. de Entomologia, Universidade Federal de Viçosa, CEP 36.570-900, Viçosa, MG, Brazil.
Instituto de Biodiversidad Neotropical (IBN), CONICET-U.N.T. & Facultad de Ciencias Naturales, Universidad Nacional de Tucumán, San Miguel de Tucumán,4.000 Tucumán, Argentina.
3Universidade Federal de Rondônia – UNIR, Programa de Pós-Graduação em Ciências Ambientais, Laboratório de Biodiversidade e Conservação – LABICON, CEP: 76940-000, Rolim de Moura, Rondônia, Brazil.
Ephemeroptera Taxonomy Neotropics Atlantic Forest Amazon key

Abstract

Based on nymphs collected in Espírito Santo and Amazonas, Southeastern and Northern Brazil, two new species of the genus Rivudiva Lugo-Ortiz & McCafferty, 1998 (Ephemeroptera: Baetidae) are described. Rivudiva inma sp. nov. shares several characteristics with R. minantenna Lugo-Ortiz & McCafferty, 1998, but can be distinguished by details of leg setation, such as length and shape of robust setae and presence of setae on trochanter. Rivudiva oonirikoperi sp. nov. is more similar to R. trichobasis Lugo-Ortiz & McCafferty, 1998, but can be separated by the absence of setae on scape and pedicel, shape of distal margin of labrum, and length of maxillary palp. New diagnoses and illustrations are provided for R. minantenna and R. trichobasis, as well as a key to the known nymphs of Rivudiva species.

 

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