Petruca panamensis
Rock Fiddler Crab
Type Description
Gelasimus panamensis Stimpson, W. (1859) Notes on North American Crustacea, No. 1. Annals of the Lyceum of Natural History of New York 7:49–93.
Taxonomy
Subfamily Gelasiminae → Supertribe Gelasimitae → Tribe Minucini → Genus Petruca Common Names
Synonyms, Alternate Spellings, & Name Forms (Chronology )
Gelasimus panamensis Minuca panamensis Petruca panamensis Uca (Leptuca) panamensis Uca (Minuca) panamensis Uca panamensis Size
Small Carapace Breadth: 15.3 mm ± 2.22 (sd), 95% range: 11.0–19.7 mm (Data )
Geographic Range
Eastern Pacific Realm: El Salvador to northern Peru
Purple fiddler crabs iNaturalist ; yellow circles with a question mark
Range map data derived from: Crane (1975)
Associated Field Guides
Pacific Coasts of Colombia, Ecuador, and Northern Peru Pacific Coasts of Costa Rica and Panama Pacific Coasts of El Salvador, Honduras, and Nicaragua External Links
Encyclopedia of Life Wikipedia iNaturalist NCBI Taxonomy Browser/Genbank GBIF
Barnwell & Szelistowski (1985) ,
Beinlich & von Hagen (2006) ,
Boone (1927) ,
Boone (1929) ,
Bott (1954) ,
Bott (1973) ,
Cano (1889) ,
Cano (1889) ,
Chirichigno Fonseca (1970) ,
Crane (1941) ,
Crane (1944) ,
Crane (1947) ,
Crane (1957) ,
Crane (1975) ,
Evans (1967) ,
Garth (1948) ,
Glassell (1934) ,
Hendrickx (1995) ,
Hendrickx (1995) ,
Holthuis (1954) ,
Invemar et al. (2006) ,
Kameya et al. (1998) ,
Kingsley (1880) ,
Lazarus-Agudelo & Cantera-Kintz (2007) ,
Leija-Tristán et al. (1990) ,
Lemaitre & Alvarez León (1992) ,
Levinton et al. (1996) ,
Lockington (1877) ,
Maccagno (1928) ,
Moscoso (2012) ,
Moscoso (2013) ,
Nabout et al. (2010) ,
Ng et al. (2008) ,
Nobili (1901) ,
Oliveira (1939) ,
Peters (1955) ,
Powers (1975) ,
Rathbun (1911) ,
Rathbun (1918) ,
Rosenberg (2000) ,
Rosenberg (2001) ,
Rosenberg (2002) ,
Rosenberg (2019) ,
Rosenberg (2020) ,
Salmon & Zucker (1988) ,
Shih et al. (2016) ,
Smith (1870) ,
Stimpson (1859) ,
Strauch & Abele (1979) ,
Sturmbauer et al. (1996) ,
Thurman et al. (2025) ,
von Hagen (1968) ,
von Hagen (1970) ,
von Prahl (1982) ,
von Prahl (1986) ,
von Prahl & Guhl (1979)
indicate locations where this species is found according to the scientific record; blue fiddler crabs surrounded by a dashed circle 
indicate the same but for larger, general regions; green fiddler crabs 
indicate “research grade” observations imported from iNaturalist; yellow circles with a question mark 
indicate questionable records of this species from the scientific record; and red circles with an x 
indicate false or mistaken records from the scientific record.
