Checklist of decapods (Crustacea) from the coast of São Paulo State (Brazil) supported by integrative molecular and morphological data: II. Infraorder Caridea: family Alpheidae Author Almeida, Alexandre O. Author Terossi, Mariana Author Buranelli, Raquel C. Author Castilho, Antonio L. Author Costa, Rogério C. Author Zara, Fernando J. Author Mantelatto, Fernando L. text Zootaxa 2018 2018-07-25 4450 3 331 358 journal article 29205 10.11646/zootaxa.4450.3.2 95ecca34-c5f8-48d0-b1a3-af6cb7457754 1175-5326 1452553 C95EF94A-176D-48E8-A9FE-CDB6E1F3D4F1 Alpheus platycheirus Boone, 1927 Alpheus platycheirus Boone, 1927 : 131 –135, figs. 29, 30. Material examined. Brazil , São Paulo : 2 ♂ , CCDB 3818 , Ubatuba , Enseada de Ubatuba , Praia do Cedro , coll. A. Castilho & R. Costa , 06.vii.2011 ; 1 ♂ , CCDB 3816 , Ubatuba , Enseada de Ubatuba , Praia do Cedro , coll. A . Castilho et al ., 07.vii.2011 ; 1 ♂ , CCDB 3888 , Ubatuba , Praia Grande, coll. F. Zara , 23.iv.2012 . Distribution. Western Atlantic—Gulf of Mexico , Caribbean Sea, and Brazil ( Alagoas , Espírito Santo , Rio de Janeiro , São Paulo ) (Bracken-Grissom et al . 2014; Bracken-Grissom & Felder 2014). Previous records. Ubatuba (Bracken-Grissom et al . 2014) Remarks. According to Bracken-Grissom et al . (2014), A . platycheirus belongs to the A . floridanus complex; our material matches A . platycheirus . The 16S sequence that we used was the same used by Bracken-Grissom et al . (2014) in the molecular phylogeny composition of the A . floridanus complex. Such sequence was obtained from the batch CCDB 3888, from Ubatuba, São Paulo . Both molecular phylogenies (concatenated dataset and 16S gene) proposed by Bracken-Grissom et al . (2014) suggested a genetic/geographic structure within A . platycheirus that separated the specimens of the northern Gulf of Mexico from the others (the Caribbean Sea, southeast Gulf of Mexico , and Brazil ). This structure needs a more refined study for clarification since the specimen from Ubatuba and the syntype had an undefined position. GenBank accession number: CCDB 3888—16S ( KP 100605 ), COI ( KU313006 ).