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| Rivudiva inma Salles & Nieto
in Salles, Nieto & Cruz, 2020.
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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.
Keywords: Ephemeroptera, Taxonomy, Neotropics, Atlantic Forest, Amazon, key
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| Male of Rivudiva inma, sp. nov. |
Rivudiva inma Salles & Nieto, sp. nov.
Etymology. After the Instituto Nacional da Mata Atlântica (INMA), the Brazilian National Institute of the Atlantic Forest. INMA is located in the city of Santa Teresa, locality of the new species, and one of the institute’s most important mission is the conservation of the Atlantic Forest and, therefore, of the new species.
Rivudiva oonirikoperi Cruz, sp. nov.
Etymology. Õonirikoperi is a word in Baniwa language, from Baniwa indigenous ethnicity, a group of Native American inhabiting the area where the species was collected. This word is attributed to any specimen of Ephemeroptera. However, its literal meaning is “a being [malevolent] that walk inside the water”. The name is in apposition.
F.F. Salles, C. Nieto and P.V. Cruz. 2020. New Species of Rivudiva Lugo-Ortiz & McCafferty (Ephemeroptera: Baetidae) with Comments on R. minantenna Lugo-Ortiz & McCafferty and R. trichobasis Lugo-Ortiz & McCafferty. Zootaxa. 4786(1); 37–52. DOI: 10.11646/zootaxa.4786.1.3
