Achelous tumidulus Stimpson, 1871

Cronius tumidulus Stimpson, 1871: 149 .

Material examined. Brazil, São Paulo: 1 j, CCDB 2035, Ubatuba, Ubatumirim, coll. F. Mantelatto, 01.i.2000; 1 ♂, 2 ♀ , CCDB 2036, Ubatuba, Ubatumirim, coll. F. Mantelatto, 12.ii.1999; 1 ♂ , CCDB 127, Ubatuba, Enseada de Ubatuba, coll. F. Mantelatto, 22.ii.1996; 5 ♂, 2 ♀ , CCDB 128, Ubatuba, Enseada de Ubatuba, coll. F. Mantelatto, 22.ii.2000; 1 ♀ , CCDB 131, Ubatuba, Enseada de Ubatuba, coll. F. Mantelatto, 29.xi.2006; 1 ♂ , CCDB 1402, Ubatuba, Ilha Anchieta, coll. F. Mantelatto, 01.viii.2000; 1 ♂, 1 ♀ , CCDB 1403, Ubatuba, Ilha Anchieta, colls. F. Mantelatto & R. Biagi, 01.i.2001; 2 ♂ , CCDB 1404, Ubatuba, Ilha Anchieta, colls. F. Mantelatto & R. Biagi, 01.iii.2001; 2 ♂ , CCDB 1401, Ubatuba, Ilha Anchieta, colls. F. Mantelatto & R. Biagi, 01.vii.2002 .

Distribution. Western Atlantic—USA (Florida, Bermudas), Caribbean Sea, Venezuela, Guianas, and Brazil (Pará, Maranhão, Piauí, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, Sergipe, Bahia, São Paulo, Santa Catarina) (Powers 1977; Barreto et al. 1993; Moran & Dittel 1993; Bertini et al. 2004; Almeida et al. 2007a, b; Hernández-Ávila et al. 2007; Almeida & Coelho 2008; Felder et al. 2009).

Remarks. Previous records in São Paulo include Ubatuba (Bertini et al. 2004) and Ilha Vitória (Alves et al. 2012a). Molecular perspective revealed the phylogenetic position of the species within the genus Achelous and not Cronius (Mantelatto et al. 2009) . Sequences accession number (GenBank): ULLZ 4770—16S (FJ152149) (Mantelatto et al. 2009), CCDB 4039—COI (MF490069) (Mantelatto et al. 2018a).