Atya scabra (Leach, 1816)

(Fig. 7B)

Atys scaber Leach, 1816: 345 .

Material examined. Brazil, São Paulo: 1 j, CCDB 4383, Ubatuba, colls. F. Carvalho et al., 23.ix.2012; 1 ♀ ov, CCDB 5529, Ubatuba, coll. F. Zara, 03.i.2015; 5 ♂, 7 ♀ (4 ♀ ov) , 2 j, CCDB 2852, São Sebastião, Rio Guaecá, colls. F. Mantelatto et al., 11.vii.2006; 2 ♂, 6 ♀ (2 ♀ ov) , CCDB 2851, São Sebastião, Rio Guaecá, colls. F. Mantelatto et al., 10.xi.2007; 1 ♂ , 5 j, CCDB 2157, Ilhabela (Ilha de São Sebastião), Rio da Toca, coll. E. Mossolin, 13.vii.2006; 1 ♂ , CCDB 2151, Ilhabela (Ilha de São Sebastião), Rio Castelhano, coll. E. Mossolin, 07.v.2007; 1 ♂ , CCDB 2160, Ilhabela ( Ilha de São Sebastião), coll. E. Mossolin, 19.vii.2007 .

Distribution. Western Atlantic— Mexico, Guatemala, Honduras, Nicaragua, Costa Rica, Panama, Cuba, Haiti, Dominican Republic, Jamaica, Puerto Rico, Saint Kitts and Nevis, Montserrat, Guadeloupe, Dominica, Martinique, St. Lucia, Grenada, Curaçao, Trinidad and Tobago, Colombia, Venezuela, and Brazil (Ceará, Rio Grande do Norte, Pernambuco, Alagoas, Sergipe, Bahia, Espírito Santo, Rio de Janeiro, São Paulo, Santa Catarina, Rio Grande do Sul). Eastern Atlantic— Liberia to Angola and Cape Verde islands to Annobón (Rathbun 1901; Bouvier 1904, 1909; Hart 1961; Chace & Hobbs 1969; Rodriguez 1980; Hobbs & Hart 1982; Abele & Kim 1989; Pereira de Barros & Braun 1997; Ramos-Porto & Coelho 1998; Bond-Buckup & Buckup 1999; De Grave et al. 2013; Pileggi et al. 2013; Oliveira et al. 2019).

Remarks. Previous records from the coast of São Paulo include Ubatuba, São Sebastião, Ilhabela (Ilha de São Sebastião), Peruíbe, and Cananéia (Ilha do Cardoso) (Rocha & Bueno 2004; Herrera-Correal et al. 2013; Oliveira et al. 2019). Specimens found on the Pacific side of America are probably the result of anthropic introductions, with the exception of them from Panama (Hobbs & Hart 1982; Mantelatto et al. 2016c). This species has a huge genetic variability (Oliveira et al. 2019), and two distinct lineages (Atlantic/Caribbean/Pacific and Gulf of Mexico) were detected by Oliveira et al. (2021). Sequences accession number (GenBank): CCDB 2852—16S (KM670921), COI (KM670943) (Oliveira et al. 2019).