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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

  • Frederico Falcao Salles (a1) and Jeane Marcelle Cavalcante do Nascimento (a1)
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.

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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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Copyright
Corresponding author
ffsalles@gmail.com
References
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[1] 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.
[2] 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.
[3] 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.
[4] 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.
[5] 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.
[6] Traver, J.R., 1943. New Venezuelan mayflies. Bol. Entomol. Venezolana , 2, 7998.
[7] Traver, J.R., 1971. Four new species of Neotropical Baetis (Ephemeroptera: Baetidae). Proc. Entomol. Soc. Washington , 73, 5863.
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Annales de Limnologie - International Journal of Limnology
  • ISSN: 0003-4088
  • EISSN: 2100-000X
  • URL: /core/journals/annales-de-limnologie-international-journal-of-limnology
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