Checklist of decapod crustaceans from the coast of the São Paulo state (Brazil) supported by integrative molecular and morphological data: IV. Infraorder Anomura: Superfamilies Chirostyloidea, Galatheoidea, Hippoidea and Paguroidea Author Mantelatto, Fernando L. Author Miranda, Ivana Author Vera-Silva, Ana L. Author Negri, Mariana Author Buranelli, Raquel C. Author Terossi, Mariana Author Magalhães, Tatiana Author Costa, Rogério C. Author Zara, Fernando J. Author Castilho, Antonio L. text Zootaxa 2021 2021-04-29 4965 3 558 600 journal article 6993 10.11646/zootaxa.4965.3.9 81e47d68-d09e-4609-af50-db862a19c216 1175-5326 4755166 8FF7B0FC-44DD-4641-A129-0FD33EB4597A Polyonyx gibbesi Haig, 1956 Polyonyx gibbesi Haig, 1956: 28–30 . Material examined. Brazil , São Paulo : 1 ♀ , CCDB 2391 , Ubatuba , Enseada de Ubatuba , colls. F. Mantelatto et al ., 26.ix.2002 . Distribution. Western Atlantic— USA ( Massachusetts , Rhode Island , North Carolina , South Carolina , Florida, Texas ), Panama , Cuba , Puerto Rico , Trinidad and Tobago , Venezuela , Brazil ( Ceará , Pernambuco , Bahia , Espírito Santo , Rio de Janeiro , São Paulo , Paraná , Santa Catarina, Rio Grande do Sul ), Uruguay , Argentina ( Haig 1956 ; Gore 1968; Craig 1974 ; Melo 1999 ; Rodríguez et al. 2005 ; Coelho et al. 2007 ; Belleggia et al. 2010 ; Ferreira & Melo 2016 ; Spivak et al . 2019 ). Remarks. Polyonyx gibbesi is a common commensal of the tubicolous polychaete, Chaetopterus variopedatus (Renier, 1804) ( Haig 1956 ; Gore 1968; Craig 1974 ; Williams 1984 ), living in pairs, and rarely found outside their tubes. The species occurs from the intertidal zone down to depths of 50 m , on rocks, sand and mud of the sublittoral region ( Veloso & Melo 1993 ).