An annotated and illustrated checklist of the porcelain crabs of Panama (Decapoda: Anomura) Author Ferreira, Luciane Augusto De Azevedo 0000-0003-1683-9962 Author Anker, Arthur 0000-0002-5350-4267 arthuranker7@gmail.com text Zootaxa 2021 2021-09-27 5045 1 1 154 http://dx.doi.org/10.11646/zootaxa.5045.1.1 journal article 10.11646/zootaxa.5045.1.1 1175-5326 5532178 B12C62E3-70D0-4989-BB1A-F4A75C492D8F Petrolisthes tonsorius Haig, 1960 ( Figs. 73 , 90E ) Petrolisthes tonsorius Haig 1960: 85 , pl. 3, pl. 26, fig. 1; Werding 1977: 205 , fig. 24, Gore 1982: 20 ; Rodríguez et al. 2005: 566 ; Hiller et al . 2006: 554 , 565; Lazarus-Agudelo & Cantera-Kintz 2007: 230 ; Lessios 2008: 73; García-Madrigal & Andréu- Sánchez 2009: 40, fig. 5D; Diez & Lira 2017: 447 ; Poupin 2018: 151 ; Hiller & Werding 2019: 144 , 148, fig. 1. Not Petrolisthes tonsorius . —Werding 1978: 220 [= Petrolisthes virgilius Hiller & Werding 2019 ]. Material examined . None. Material listed on STRI collection website [https://stricollections.org/portal/collections]. Panama [Caribbean]: 12 specimens , cl cw indet. ( USNM 210868 ), Punta Galeta , STRI Panama Survey , 07.06.1979 [examined and identified by R .H. Gore, 1982 ]; 5 specimens , cl cw indet. ( USNM 1163357 ), Caledonia Bay ( Bahía de Caledonia ), shore, leg. W.L. Schmitt , 03.04.1939 [examined and identified by A. Hiller , 2011]. Extralimital material. French Antilles : 1 male , cl cw indet. ( FLMNH UF 31931 ), Saint Martin , Sta. STM-013, off Mont Vernon , south of Petite Clef Island (“ Little Key ”), 18°05’59.3”N , 63°01’18.3”W , depth 0–2 m , leg. J. Slapcinski et al ., 11.04.2012 (fcn BSTM-0344) . Bonaire : 1?male, cl cw indet. ( RMNH . CRUS .D.57962), opposite “ Alice in Wonderland ” dive site, intertidal, leg. M. Faasse , 09.11.2019 . Previous records from Panama . None. Distribution . West Atlantic: Cuba , E and S Lesser Antilles; Panama (Punta Galeta, Bahía de Caledonia), Colombia and Venezuela ( Rodríguez et al . 2005 ; Diez & Lira 2017 ; Poupin 2018 ; Hiller & Werding 2019 ; present study). East Pacific: Mexico , Costa Rica (including Cocos I.), Colombia , Ecuador (including Galápagos ) ( Haig 1960 ; Rodríguez et al. 2005 ; Lazarus-Agudelo & Cantera-Kintz 2007 ; García-Madrigal & Andréu-Sánchez 2009 ; Hiller & Werding 2019 ). Ecology . Intertidal and shallow subtidal, known depth range: 0–20 m ; rocky shores and reefs, under boulders, also in coral rocks and on “sand and shell bottoms” in deeper water ( Haig 1960 ; Gore 1982 ). Remarks . Despite having a wide distribution in the tropical eastern Pacific ( type locality: Galápagos) and the Caribbean Sea, P. tonsorius does not appear to be a common species. Although Hiller & Werding (2019) seem to have confirmed the status of P. tonsorius as a single species with transisthmian distribution, the average distance between the populations from the eastern Pacific and western Atlantic in the 16S rRNA gene fragment was 4.8%, which is rather significant (see also Hiller et al . 2006 : fig. 3). They also noted an overlapping intraspecific variation in the colour pattern on each side of the Isthmus of Panama , with the more common brown colour morph and the less common bluish colour morph ( Figs. 73 , 90E ; see also García-Madrigal & Andréu-Sánchez 2009 : fig. 5D; Hiller & Werding 2019 : fig. 1).