Americabaetis labiosus Lugo-Ortiz & McCafferty, 1996

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, Zootaxa 2560 (1), pp. 16-28 : 23

publication ID

https://doi.org/ 10.11646/zootaxa.2560.1.2

DOI

https://doi.org/10.5281/zenodo.5309652

persistent identifier

https://treatment.plazi.org/id/20049746-3C6E-FE31-18B9-FF67FDB3F883

treatment provided by

Felipe

scientific name

Americabaetis labiosus Lugo-Ortiz & McCafferty, 1996
status

 

Americabaetis labiosus Lugo-Ortiz & McCafferty, 1996 View in CoL

( Figs. 1c View FIGURE 1 , 14–17 View FIGURES 14–17 , 18, 21, 25 View FIGURES 18–26 , 29 View FIGURES 27–30 )

Americabaetis labiosus Lugo-Ortiz & McCafferty, 1996: 164 View in CoL ; Francischetti et al., 2003: 69; Domínguez et al., 2006: 70; Salles et al., 2010: 302 View Cited Treatment .

Diagnoses. Nymphs: 1) Frontal keel absent; 2) lingua broadly pointed apically; 3) glossa 0.6x length of paraglossa, 4) apex of paraglossa with rows of pectinate setae; 5) segment II of labial palp with a small distomedial projection; 6) posterior margin of abdominal terga with rounded spines.

Male imago: 1) turbinate eyes anteriorly divergent and widely separated from each other, upper surface ellipsoidal ( Fig. 14 View FIGURES 14–17 ); 2) terga light whitish brown, lateral margins darker ( Figs. 14, 15 View FIGURES 14–17 ); 3) forceps with first segment constricted medioapically ( Fig. 17 View FIGURES 14–17 ); 4) posterior margin of subgenital plate with a small rounded projection ( Fig. 17 View FIGURES 14–17 ); 5) length of body relatively small (4.0 mm).

Description (Male imago). Measurements. Body 4.0 mm; forewing 4.0– 4.3 mm; antenna 0.7 mm; tibia I: 1.31 mm; tibia II: 0.88 mm; tibia III: 0.89 mm.

Head ( Figs. 14–15 View FIGURES 14–17 ). Coloration light brown with V shaped brown mark between compound eyes. Turbinate portion of compound eyes orangish; basal half of stalk brown, paler toward apex. Antenna light brown. Dorsal portion of turbinate eyes ellipsoidal; length 1.5x width; stalk height 0.5x width of dorsal portion; inner margins widely separated, divergent anteriorly.

Thorax ( Figs. 14–15 View FIGURES 14–17 ). Pro, meso and metanotum brown; submedioscutum light brown; scutellum dark brown. Sternum brown. Anteronotal protuberance rounded. Metascutellar protuberance pointed dorsally. Legs whitish. Leg I: tibia 1.7x length of femur; tarsi 1.6x length of femur; and with 4 segments decreasing on length apically. Leg II and III: tibia 1.4x length of femur; tarsi 0.4x length of femur. Forewing ( Figs. 16 View FIGURES 14–17 ) hyaline, posterior region of costal and subcostal veins grayish; veins Costal and subcostal light brown; stigmatic area with 6 cross veins not touching subcostal vein; marginal intercalary paired, except single between veins ICu1 and A; length of intercalary vein between IMA and IMA2 1.7x distance between adjacent longitudinal veins; length of forewing about 2.4x width.

Abdomen ( Figs. 14–15 View FIGURES 14–17 ). Terga light whitish brown, lateral margins darker; tracheation blackish. Sterna light whitish brown. Genitalia ( Figs. 17 View FIGURES 14–17 ) segment I whitish washed with brown, segments II and III whitish. Forceps segment I distinctly constricted medioapically; 0,5x length of segment II; distance between base of forceps 0,2x distance between lateral margins of forceps. Forceps segment II narrow submedially. Forceps segment III elongate, 2.7x as long as wide; 0.17x length of segment II. Posterior margin of subgenital plate with a small rounded projection.

Comments. In Brazil A. labiosus is apparently restricted to the southern area of the country. Their nymphs, as those of A. titthion and A. mecistognathus , sp. nov., inhabit shallow areas with moderate to fast current ( Fig. 29 View FIGURES 27–30 ). However, unlike these species, they are often associated with dead leaves above rocks. The altitudinal range of this species varies from 700 to 1900 m.a.s.l.

Distribution. PARAGUAY, URUGUAY, BRAZIL: Rio Grande do Sul, Paraná, Santa Catarina; Rio de Janeiro, Espírito Santo, São Paulo. NEW RECORDS: Minas Gerais ( Fig. 1b View FIGURE 1 ).

Material examined. MINAS GERAIS, Chácara , Cachoeira Menezes, 16/i/2000, CNF & R. F. Rocha ; ESPÍRITO SANTO, Santa Teresa , Nova Lombardia , Sítio Capitel de Santo Antônio, Córrego Grande, S 19°52’31.0” / W 40°31’49.1”, 768 m. a.s.l., 19-20/i/2008, 20/ii/2009, FFS col. ( CEUNES). One male imago (reared), Brazil GoogleMaps , ESPÍRITO SANTO, Alfredo Chaves Country , Nova Estrela, waterfall Petralonga, 20°39'76.6"S/ 40°50'72.6"W, 23.v.2008, RB col. One male imago and one male subimago (reared), Brazil , ESPÍRITO SANTO, Alfredo Chaves Country , Nova Estrela, waterfall Petralonga, 20°39'76.6"S/ 40°50'72.6"W, 20.ii.2009, RB col .

CNF

Croatian Mycological Society

R

Departamento de Geologia, Universidad de Chile

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Ephemeroptera

Family

Baetidae

Genus

Americabaetis

Loc

Americabaetis labiosus Lugo-Ortiz & McCafferty, 1996

Salles, F. F., Raimundi, E. A., Boldrini, R. & Souza-Franco, G. M. 2010
2010
Loc

Americabaetis labiosus

Salles, F. F. & Nascimento, J. M. C. & Massariol, F. C. & Angeli, K. B. & Silva, P. & Rudio, J. A. & Boldrini, R. 2010: 302
Dominguez, E. & Molineri, C. & Pescador, M. L. & Hubbard, M. D. & Nieto, C. 2006: 70
Francischetti, C. N. & Salles, F. F. & Lugo-Ortiz, C. R. & Da-Silva, E. R. 2003: 69
Lugo-Ortiz, C. R. & McCafferty, W. P. 1996: 164
1996
Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF