Abstract
The genus Camelobaetidius Demoulin (Ephemeroptera: Baetidae) is represented in South America by 28 species: 19 of them are described based on nymphs, three based solely on adults, and only six based on nymphs and adults (Salles & Serrão, 2005; Dominguez et al., 2006; Boldrini & Salles, 2009; Salles & Nascimento, 2009; Boldrini et al., 2010). Camelobaetidius cayumba (Traver & Edmunds, 1968) was described from nymphs and can be distinguished, among other characteristics, by the inner margin of the second segment of labial palp pointed, thoracic gill absent at base of forelegs, claws with 15–18 denticles, and terminal filament about as long as cerci. It has been reported from Peru (Traver & Edmunds, 1968), French Guiana (Thomas et al., 2003), and Brazil (Salles & Serrão, 2005). The aim of the present paper is to describe the adults of C. cayumba from reared nymphs. The specimens were collected on rocky substrate of streams, and the adults were obtained by rearing these nymphs in the laboratory. Terms used in descriptions of thorax are in accordance to Kluge (1994). The material examined is housed in the Zoological Collection Norte Capixaba, Universidade Federal do Espírito Santo, São Mateus, ES (CZNC), Instituto Nacional de Pesquisas da Amazônia, Manaus, AM (INPA), and Entomological Collection of the Universidade Federal de Pernambuco, Recife, PE (UFPE).
References
Boldrini, R. & Salles, F.F. (2009) A new species of two-tailed Camelobaetidius (Insecta: Ephemeroptera: Baetidae) from Espírito Santo, southeastern Brazil. Revista do Museu de Biologia Mello Leitão, 25, 5–12.
Boldrini, R., Salles, F.F. & Pes, A.M.O. (2010) Imagos of Camelobaetidius francischettii Salles, Andrade & Da-Silva (Ephemeroptera: Baetidae). Zootaxa, 2476, 65–68.
Dominguez, E., Molineri, C., Pescador, M.L., Hubbard, M.D. & Nieto, C. (2006) Ephemeroptera of South America. In Aquatic Biodiversity of Latin America (J. Adis, JR. Arias, G. Rueda-Delgado & K.M. Wantzen, eds.) Vol. 2, Moscow-sofia, p.1–646.
Dominique, Y., Thomas, A., Orth, K. & Dauta, C. (2001) Les ephémères de la Guyane Française. 2. Camelobaetidius billi et C. janae n. spp. [Ephemeroptera, Baetidae]. Ephemera, 2000, 2(1), 39–48.
Falcão, J.N., Salles, F.F. & Hamada, N. (2010) Baetidae (Insecta, Ephemeroptera) ocorrentes em Roraima, Brasil: novos registros e chaves para gêneros e espécies no estágio ninfal. Revista Brasileira de Entomologia, 55(4), 516–548.
Kluge, N.J. (1994) Pterothorax structure of mayflies (Ephemeroptera) and its use in systematics. Bulletin de la Sociéte Entomologique de France, 99, 41–61.
Kluge, N.J. & Novikova, E.A. (2011) Systematics of the mayfly taxon Acentrella (Ephemeroptera: Baetidae), with description of new Asian and African species. Russian Entomological Journal, 20(1), 1–56.
Salles, F.F. & Dias, L.G. (2004) Descrição dos adultos de Camelobaetidius billi. (Ephemeroptera, Baetidae). Iheringia, Série Zoológica, 94(3), 269–270.
Salles, F.F., Andrade, M.B. & Da-Silva, E.R. (2005) Camelobaetidius francischettii: a new species of Baetidae (Ephemeroptera) from Brazil. Zootaxa, 1027, 47–53.
Salles, F.F. & Serrão, J.E. (2005) The nymphs of the genus Camelobaetidius Demoulin (Ephemeroptera: Baetidae) in Brazil: new species, new records, and key for the identification of the species. Annales de Limnologie, 41(4), 267–279.
Salles, F.F. & Nascimento, J.M.C. (2009) The genus Rivudiva Lugo-Ortiz and McCafferty (Ephemeroptera: Baetidae): First generic description of adults, new combinations, and notes on the nymphs. Annales de Limnologie, 45, 231–235.
Thomas, A., Dominique, Y. & Horeau, V. (2003) Les Ephemeres de la Guyane Française. 7. Redescription de Camelobaetidius cayumba (Traver & Edmunds, 1968) (Ephemeroptera: Baetidae). Ephemera, Vol 3(2), 117–122.
Traver, J.R. & Edmunds Jr., G.F. (1968) A revision of the Baetidae with spatulate-clawed nymphs (Ephemeroptera). Pacific Insects, 10, 629–677.