Aratus pisonii (H. Milne Edwards, 1837)

Material examined (N=1). 1juv, 29/VIII/2004, St. 0 7 (MZUESC #729).

Distribution. Western Atlantic – Florida, Gulf of Mexico, Antilles, northern South America, Guyanas, and Brazil (from Piauí to São Paulo) (Melo 1996). Eastern Pacific – from Magdalena Bay, Baja California, and the southwestern Gulf of California, to Peru (Hendrickx 1995). Brazil – Pará (Barros et al. 1997a).

Ecological notes. Adults are supratidal. Very common in estuaries, where it is found on rocks and jetties, or climbing on mangrove trees (Melo 1996).

Previous records in Bahia. Rathbun (1918), Almeida et al. (2006).

Remarks. The material consists of only one juvenile crab, which explains the presence of this species in a collection made by trawling.