Americabaetis longetron Lugo-Ortiz & McCafferty 1996

Americabaetis longetron Lugo-Ortiz & McCafferty, 1996 (Figs. 1d, 19, 22, 26, 28) Americabaetis longetron Lugo-Ortiz & McCafferty, 1996: 165; Francischetti et al., 2003: 69; Domínguez et al., 2006: 70; Salles & Boldrini, 2008: 565; Salles et al., 2010: 302. Diagnoses. Nymphs: 1) frontal keel present; 2) lingua rounded apically; 3) glossa 0.8x length of paraglossa; 4) apex of paraglossa with rows of simple setae; 5) segment II of labial palp with a strong distomedial projection; 6) posterior margin of abdominal terga with pointed spines; 7) abdomen elongate. Male imago: 1) turbinate eyes uniformly separated from each other, upper surface ellipsoidal; 2) terga with a light yellowish brown band along midline; 3) forceps with first segment distinctly constricted medioapically; 4) posterior margin of subgenital plate without a small rounded projection; 5) length of body relatively long (6.3 mm). Distribution. PARAGUAY, URUGUAY, BRAZIL: Rio Grande do Sul, Paraná, Santa Catarina; Rio de Janeiro, Espírito Santo, Minas Gerais, São Paulo (Fig. 1c). Comments. Nymphs of A. longetron are present almost exclusively in banks with marginal vegetation in areas with slow to moderate current; they resemble A. alphus in several aspects, as mouthpart morphology and somewhat similar habitat (Fig. 28). However, the distribution of A. longetron is far restricted when compared to that of A. alphus. The altitudinal range of this species varies from 371 to 1063 m.a.s.l. Material examined. ESPÍRITO SANTO, Santa Teresa, Nova Lombardia, Sítio Capitel de Santo Antônio, Pinguela, S 19°52’16.0” / W 40°31’43.3”, 718 m. a.s.l., 18/ii/2009, pedra em remanso, FFS col. (CEUNES); ESPÍRITO SANTO, Caparaó, Sítio Sonho Meu, S 20°28’08,8’’ / W 41°43’32,5’’, 1063 m.a.s.l., 21/iv/2008, vegetação marginal, FFS col. (CEUNES).
Published as part of Salles, F. F., Raimundi, E. A., Boldrini, R. & Souza-Franco, G. M., 2010, The genus Americabaetis Kluge (Ephemeroptera: Baetidae) in Brazil: new species, stage description, and key to nymphs, pp. 16-28 in Zootaxa 2560 (1) on pages 25-26, DOI: 10.11646/zootaxa.2560.1.2, http://zenodo.org/record/5302607
{"references":["Lugo-Ortiz, C. R. & McCafferty, W. P. (1996) Taxonomy of the Neotropical Genus Americabaetis, New Status (Insecta: Ephemeroptera: Baetidae). Studies on Neotropical Fauna and Environment, 31, 156 - 169.","Francischetti, C. N., Salles, F. F., Lugo-Ortiz, C. R. & Da-Silva, E. R. (2003) First report of Americabaetis Kluge (Ephemeroptera: Baetidae) from Rio de Janeiro, Brazil. Entomotropica, 18, 69 - 71.","Dominguez, E., Molineri, C., Pescador, M. L., Hubbard, M. D. & Nieto, C. (2006) Ephemeroptera of South America. In: Adis, J., Arias, J. R., Rueda-Delgado, G. & Wantzen, K. M. (Eds), Aquatic Biodiversity of Latin America. Vol. 2. Pensoft, Moscow-Sofia, p. 646.","Salles, F. F. & Boldrini, R. (2008) Male imago description of Americabaetis longetron Lugo-Ortiz & McCafferty (Ephemeroptera: Baetidae), and first key to adults of the genus. Neotropical Entomology, 37, 564 - 566.","Salles, F. F., Nascimento, J. M. C., Massariol, F. C., Angeli, K. B., Barcelos e Silva, P., Rudio, J. A. & Boldrini, R. (2010) Primeiro levantamento da fauna de Ephemeroptera (Insecta) do Espirito Santo, Sudeste do Brasil. Biota Neotropica, 10 (1), 293 - 307. Available from http: // www. biotaneotropica. org. br / v 10 n 1 / pt / abstract? article + bn 02610012010 ISSN 1676 - 0603."]}