Alpheus formosus Gibbes, 1850

Almeida, Alexandre O., Boehs, Guisla, Araújo-Silva, Catarina L. & Bezerra, Luis Ernesto A., 2012, Shallow-water caridean shrimps from southern Bahia, Brazil, including the first record of Synalpheus ul (Ríos & Duffy, 2007) (Alpheidae) in the southwestern Atlantic Ocean, Zootaxa 3347, pp. 1-35 : 10-11

Alpheus formosus Gibbes, 1850

( Fig. 2 C)

Alpheus formosus Gibbes, 1850: 196 .

Material examined. 2 m, 3 f, 03.VIII.2008, Cairú, Tassimirim Beach, Boipeba Island, MZUESC 1320; 1 f, 1 ni, 16.V.2007, Santa Cruz Cabrália, Coroa Vermelha Beach, MZUESC 867; 1 ni, 16.V.2007, Santa Cruz Cabrália, Coroa Vermelha Beach, MZUESC 868.

Distribution. Western Atlantic—Bermuda, North Carolina to Brazil (Atol das Rocas, Fernando de Noronha, Ceará to São Paulo) ( Christoffersen 1998; Anker et al. 2008b).

Ecological notes. Specimens were collected on coral reefs, from crevices of coral rubble and concretions of calcareous algae. Salinity range: 33–39 psu. Depth range: intertidal to 42 m ( Anker et al. 2008b).

Previous records. Abrolhos ( Gomes Corrêa 1972, as A. formosus ; Christoffersen 1979, as A. formosus ); Camamu Bay ( Almeida et al. 2007b, as Alpheus cf. formosus ).

Remarks. Alpheus formosus differs from the closely related A. paraformosus Anker, Hurt & Knowlton, 2008 in the presence of balaeniceps setae on the minor chela fingers in both sexes; the more posteriorly extending orbitorostral grooves; and some details of the color pattern ( Anker et al. 2008b; see also Fig. 2 C). The latter species is currently known only from the western Caribbean Sea.

Figures

FIGURE 2. Alpheid shrimps from southern Bahia, Brazil. (A) Alpheus bouvieri A. Milne-Edwards, 1878, male from Cachoeira River, Maramata Beach, Ilhéus. (B) Alpheus cristulifrons Rathbun, 1900, ovigerous female from Tassimirim Beach, Cairú. (C) Alpheus formosus Gibbes, 1850, male from Tassimirim Beach, Cairú. (D) Alpheus cf. paracrinitus Miers, 1881, male from Taipus de Fora Beach, Maraú. (E) Alpheus cf. rostratus W. Kim & Abele, 1988, ovigerous female from Taipus de Fora Beach, Maraú. (F) Salmoneus carvachoi Anker, 2007, two ovigerous individuals from Maraú River, Maraú.