Americabaetis alphus Lugo-Ortiz & McCafferty, 1996: 163
Francischetti et al ., 2003: 69
Salles et al ., 2004: 2
Domínguez et al ., 2006: 69
Salles et al ., 2010: 302
The genus Americabaetis Kluge (Ephemeroptera: Baetidae) in Brazil: new species, stage description, and key to nymphs
Salles, F. F.
Raimundi, E. A.
Boldrini, R.
Souza-Franco, G. M.
Zootaxa
2010
2010-08-06
2560
1
16
28
Salles et al ., 2010: 302
CR5H
Lugo-Ortiz & McCafferty, 1996
Lugo-Ortiz & McCafferty
1996
[151,818,674,700]
Insecta
Baetidae
Americabaetis
Animalia
Ephemeroptera
6
22
Arthropoda
species
alphus
( Figs. 1b, 20, 23, 24, 28)
Americabaetis alphus Lugo-Ortiz & McCafferty, 1996: 163; Francischetti et al., 2003: 69; Salles et al., 2004: 2; Domínguez et al., 2006: 69; Salles et al., 2010: 302. Diagnoses.Nymphs: 1) frontal keel present; 2) lingua pointed 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.
Male imago: 1) turbinate eyes uniformly and widely separated from each other, upper surface ellipsoidal; 2) forceps with first segment not constricted medioapically; 3) posterior margin of subgenital plate without a small rounded projection; 4) length of body relatively small (less than 5.0 mm).
Distribution. ARGENTINA, BOLIVIA, CHILE, PARAGUAY, BRAZIL: Rio Grande do Sul, Santa Catarina, Paraná, Minas Gerais, São Paulo, Rio de Janeiro, Espírito Santo, Mato Grosso, Bahia. NEW RECORDS: Pernambuco, Sergipe, Goiás, Amazonas( Fig. 1a).
Comments. Americabaetis alphusis probably the species of Ephemeropterawith the widest distributional range in South America, as well as one of the most abundant, at least in Brazil. Their nymphs are found in several biomes and on small streams to large rivers, often associated with marginal vegetation and leaf litter in areas with slow to moderate current ( Fig. 28). The altitudinal range of this species is also highly variable, specimens were found from the sea level to 1900 m.a.s.l. They were also encountered in pristine to moderately impacted streams, demonstrating that the species is somewhat tolerant, what, in turn, would explain its wide distribution.
Material examined. ALAGOAS, Rio Largo, Afluente do Rio Mandaú, "Lajeiro", S 09°28.496'/ W 35°52.303', Vegetaçãomarginal, 15/iii/2004, CNFCOL. ( UFVB); SERGIPE, Japaratuba, Rio da Prata, S 10°37.764'/ W 36° 55.451', Vegetaçãomarginal, 18/iii/2004, muitos, CNFCOL. ( UFVB); GOIÁS, Corumbáde Goiás. Corredeira da Igreja Presbiteriana, acima da calheira, S 15°49’37.1’’/ W 48°46’34.8’’, 26/vi/2003, NH COL. ( INPA); BAHIA, Correntina. Rio do Mucambo, S 13°16’45.4’’/ W 44°33’52.0’’, pedras roladas em correnteza, 03/viii/2003, NH & FFS COL. ( DZRJ); AMAZONAS, Presidente Figueiredo, Ig. Santa Cruz, hidrófitas submersas em correnteza, 08/x/03, FFS ( CEUNES); AMAZONAS, Presidente Figueiredo, Ig. do Km20, vegetação marginal em correnteza fraca, 07/x/03, F.F.Salles( CEUNES); ESPÍRITO SANTO, Santa Teresa, Nova Lombardia, Sítio Capitel de Santo Antônio, S 19°52’16.0”/ W 40°31’43.3”, 718 m.a.s.l., 19/i/ 2008, FFS col. ( CEUNES); 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., 20/i/2008, vegetação marginal, FFS col. ( CEUNES); ESPÍRITO SANTO, Caparaó, córrego na estrada, S 20°24’05,5’’/ W 41°453.45,9’’, 1015 m.a.s.l., 21/iv/2008, vegetação marginal, FFS col. ( CEUNES).
2004-03-15
CNF, UFVB
Vegetacao
-9.474934
Afluente do Rio Mandau
1
-35.871716
Rio Largo
6
22
1
Alagoas
2004-03-18
CNF, UFVB
Vegetacao
-10.6294
Rio da Prata
1
-36.924183
Japaratuba
6
22
1
Sergipe
Corumba
GOIAS
6
22
1
Goias
2003-06-26
INPA
-15.826972
Corredeira da Igreja Presbiteriana
1
-48.776333
6
22
1
Goias
2003-08-03
DZRJ
-13.279278
Correntina. Rio do Mucambo
1
-44.564445
6
22
1
Bahia
[785,1280,1669,1695]
Presidente Figueiredo & Ig
AMAZONAS
6
22
1
Amazonas
CEUNES
Santa Cruz
6
22
1
Santa Cruz
CEUNES
F. F. Salles
Ig. do Km
Presidente Figueiredo
6
22
1
Amazonas
2008-01-19
CEUNES
Santa Teresa
718
-19.87111
Sitio Capitel de Santo Antonio
1
-40.528694
Nova Lombardia
6
22
718
Espirito Santo
2008-01-20
CEUNES
Corrego Grande
Santa Teresa
768
-19.875278
Sitio Capitel de Santo Antonio
1
-40.530304
Nova Lombardia
6
22
768
Espirito Santo
2008-04-21
CEUNES
1015
-20.401527
Caparao
0
-41.0
6
22
1
Espirito Santo