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The genus Rivudiva Lugo-Ortiz and McCafferty (Ephemeroptera: Baetidae): First generic description of adults, new combinations, and notes on the nymphs

Published online by Cambridge University Press:  17 October 2009

Frederico Falcao Salles*
Affiliation:
Universidade Federal do Espírito Santo, Centro Universitário Norte do Espírito Santo, Departamento de Ciências da Saúde, Biológicas e Agrárias, São Mateus, Espírito Santo, 29933-415, Brazil
Jeane Marcelle Cavalcante do Nascimento
Affiliation:
Universidade Federal do Espírito Santo, Centro Universitário Norte do Espírito Santo, Departamento de Ciências da Saúde, Biológicas e Agrárias, São Mateus, Espírito Santo, 29933-415, Brazil
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Abstract

In the present paper, based on the rearing of nymphs in the field, we present for the first time the description of the adult stage of Rivudiva Lugo-Ortiz and McCafferty and of its type species, R. minnatena Lugo-Ortiz and McCafferty. Adults of Rivudiva can be distinguished from the other genera of Baetidae by the following combination of characters: (1) hindwings present or absent, when present with two longitudinal veins and with costal projection pointed, placed in the basal fourth of anterior margin; (2) forceps three-segmented, segment III long, about 2× as long as wide; (3) distal margin of subgenital plate with small pointed projection. Besides that, R. coveloae (Traver, 1971 [Proc. Entomol. Soc. Washington, 73, 58–63]), new combination, and R. venezuelensis (Traver, 1943 [Bol. Entomol. Venezolana, 2, 79–98]), new combination, are proposed based on the characteristics listed above, specially the distal margin of subgenital plate with a small pointed projection. Comments on the biology of the nymphs are also provided.

Type
Research Article
Copyright
© EDP Sciences, 2009

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References

Domínguez E., Molineri C., Pescador M.L., Hubbard D.M. and Nieto C., 2006. Ephemeroptera of South America, Aquatic Biodiversity of Latin America (ABLA Series), Sofia-Moscow, 646 p.
Lugo-Ortiz, C.R. and McCafferty, W.P., 1998. Five new genera of Baetidae (Insecta: Ephemeroptera) from South America. Ann. Limnol. - Int. J. Lim. , 34, 5773. CrossRef
Lugo-Ortiz, C.R. and McCafferty, W.P., 1999. Revision of South American species of Baetidae (Ephemeroptera) previously placed in Baetis Leach and Pseudocloeon Klapalek. Ann. Limnol. - Int. J. Lim. , 35, 257262. CrossRef
Orth, K., Thomas, A., Dauta, C., Horeau, V., Brosse, S. and Ademmer, C., 2000. Les Éphémères de la Guyane Française. 1. Premier inventaire générique, à but de biosurveillance [Ephemeroptera]. Ephemera , 2, 2538.
Salles, F.F., Da-Silva, E.R., Serrão, J.E. and Francischetti, C.N., 2004. Baetidae (Ephemeroptera) na região sudeste do Brasil: novos registros e chave para os gêneros no estágio ninfal. Neotropical Entomol. , 33, 725735. CrossRef
Traver, J.R., 1943. New Venezuelan mayflies. Bol. Entomol. Venezolana , 2, 7998.
Traver, J.R., 1971. Four new species of Neotropical Baetis (Ephemeroptera: Baetidae). Proc. Entomol. Soc. Washington , 73, 5863.

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The genus Rivudiva Lugo-Ortiz and McCafferty (Ephemeroptera: Baetidae): First generic description of adults, new combinations, and notes on the nymphs
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