Alpheus estuariensis Christoffersen, 1984

Alpheus estuariensis Christoffersen, 1984: 191, figs. 1–2.

Material examined. 4 m, 5 f, 1 ni, 01.VIII.2008, Cairú, Triana River, Boipeba Island, MZUESC 1270; 4 m, 7 f, 6 juv, 08.V.2008, Una, Comandatuba Village, MZUESC 1249; 2 m, 7 f, 3 juv, 06.V.2008, Canavieiras, Pardo River, MZUESC 1219; 1 m, 3 juv, 09.III.2008, Belmonte, Mojiquiçaba River, MZUESC 1182; 2 m, 4 f, 2 ni, 07.III.2008, Santa Cruz Cabrália, mouth of João de Tiba River (sandstone reef), MZUESC 1165; 4 m, 2 f, 07.III.2008, Santa Cruz Cabrália, mouth of Yaya River, MZUESC 1166; 4 m, 4 f, 08.III.2008, Santa Cruz Cabrália, João de Tiba River, near Santo André Beach, MZUESC 1170; 1 ni, 22.XI.2007, Prado, Barra do Cahy, MZUESC 1047; 1 m, 18.III.2007, Mucuri, Mucuri River, St. 1, MZUESC 800. See also report by Almeida et al. (2006).

Distribution. Western Atlantic—Florida, Mississippi to Texas, Cuba, Dominican Republic, Trinidad and Tobago, Curaçao and Brazil (Pará to Paraná) (Christoffersen 1984; Pires et al. 2008).

Ecological notes. In estuaries, on mud, in burrows under rocks, debris, among herbaceous vegetation and roots of Rhizophora mangle, and in rotting wood. Specimens of A. estuariensis were often collected together with unindentified gobiid fishes (Teleostei: Perciformes) and with the alpheid shrimp Salmoneus carvachoi Anker, 2007, suggesting a possible association. Salinity range: 2–38 psu. Depth range: intertidal to 22 m (Christoffersen 1984).

Previous records. Ilhéus (Almeida et al. 2006); Camamu Bay (Almeida et al. 2007b).