Callinectes ornatus Ordway, 1863 (Figure 18G) Callinectes ornatus Ordway, 1863: 571. Material examined. Brazil, São Paulo: 3 ♂, CCDB 323, Ubatuba, Enseada de Ubatuba, F. Mantelatto, 01.xi.2002; 9 ♂, CCDB 351, Ubatuba, Enseada de Ubatuba, colls. F. Mantelatto et al., 04.iv.2011; 2 ♂, 1 ♀, CCDB 126, Ubatuba, Enseada de Ubatuba, coll. F. Mantelatto, 24.viii.1998; 2 ♂, 1 ♀, CCDB 5492, Ubatuba, Enseada de Ubatuba, colls. F. Mantelatto et al., 30.xi.2014; 1 ♀, CCDB 137, Ubatuba, Enseada de Ubatuba, colls. F. Mantelatto et al., 01.v.2002; 3 ♀ (1 ♀ ov), CCDB 1537, Ubatuba, offshore, coll. D. Rosa, 15.viii.2011; 9 ♂, 1 ♀, CCDB 3470, Ubatuba, Praia do Cedro, coll. A. Castilho, 07.vii.2011; 1 ♂, CCDB 3883, Ubatuba, Saco da Ribeira, coll. F. Mantelatto, ii.2001; 5 ♂, 3 ♀ (1 ♀ ov), 3 j, CCDB 2815, São Vicente, colls. A. Castilho et al., 23.x.2011; 7 ♂, 4 ♀, CCDB 3243, Cananéia, colls. R. Costa & A. Castilho, 18.iv.2011; 1 ♂, CCDB 5168, Cananéia, colls. R. Costa et al., 22.vii.2012. Distribution. Western Atlantic—USA (Virginia to Florida), Gulf of Mexico, Antilles, Colombia, Venezuela, Guianas, and Brazil (Amapá, Pará, Maranhão, Ceará, Rio Grande do Norte, Paraíba, Pernambuco, Alagoas, Sergipe, Bahia, Espírito Santo, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul) (Holthuis 1959; Powers 1977; Lemaitre 1981; Barreto et al. 1993; Barros & Pimentel 2001; Bertini et al. 2004; Almeida et al. 2007a, b; Hernández-Ávila et al. 2007; Melo 2008, 2010; Felder et al. 2009). Remarks. Previous records in São Paulo include Ubatuba (Bertini et al. 2004), Caraguatatuba (Braga et al. 2005), Santos-São Vicente estuary and bay complex (Pita et al. 1985; Sant’Anna et al. 2012; Watanabe et al. 2014). A recent study indicated genetic structure among populations of C. ornatus and signs that the Amazon-Orinoco plume represents a osmotic barrier, with the presence of two evolutionary units that should be investigated regarding the taxonomic status (Peres & Mantelatto 2020). Sequences accession number (GenBank): ULLZ 4178—16S (AJ298186) (Schubart et al. 2001), ULLZ 4178—COI (MF490074) (Mantelatto et al. 2018a).

Published as part of Mantelatto, Fernando L., Tamburus, Ana Francisca, Magalhães, Tatiana, Buranelli, Raquel C., Terossi, Mariana, Negri, Mariana, Castilho, Antonio L., Costa, Rogério C. & Zara, Fernando J., 2020, Checklist of decapod crustaceans from the coast of the São Paulo state (Brazil) supported by integrative molecular and morphological data: III. Infraorder Brachyura Latreille, 1802, pp. 1-108 in Zootaxa 4872 (1) on page 64, DOI: 10.11646/zootaxa.4872.1.1, http://zenodo.org/record/4423421