Abstract
A new species of porcelain crab, Petrolisthes lazarus sp. nov., is described from the Pacific coast of Panama, based on two female specimens. The new species is morphologically most similar to another eastern Pacific species, P. crenulatus Lockington, 1878, especially in the general configuration of the carapace, chelipeds and ambulatory legs. However, P. lazarus sp. nov. can be separated from P. crenulatus by the differences in the proportions of the carapace, the shape of the frontal region of the carapace, and the setation pattern of the cheliped. In addition, P. lazarus sp. nov. and P. crenulatus appear to be allopatric, the latter species presently being known only from Mexico. Among other eastern Pacific taxa, P. lazarus sp. nov. may have some affinities with P. ortmanni Nobili, 1901 and P. lewisi (Glassell, 1936), from which it can be easily distinguished by the chelipeds lacking a dense field of setae on the outer (lateral) surface of the palm and with different proportions of some articles, especially the carpus. The four species can also be distinguished from each other by their diagnostic, although somewhat variable colour patterns.
References
Abele, L.G. & Kim, W. (1989) The decapod crustaceans of the Panama Canal. Smithsonian Contributions to Zoology, 482, 1–50.
https://doi.org/10.5479/si.00810282.482
Dong, D., Li, X. & Osawa, M. (2010) Petrolisthes polychaetus n. sp., a new species of Porcellanidae (Decapoda, Anomura) from Hainan Island, China. Crustaceana, 83 (12), 1507–1517.
https://doi.org/10.1163/001121610X538840
García-Madrigal, M.S. & Andréu-Sánchez, L.I. (2009) Los cangrejos porcelánidos (Decapoda: Anomura) del Pacífico sur de México, incluyendo una lista y clave de identificación para todas las especies del Pacífico oriental tropical. Ciencia y Mar, 13 (39), 23–54.
Glassell, S.A. (1936) New porcellanids and pinnotherids from tropical North American waters. Transactions of the San Diego Society of Natural History, 8, 227–304.
https://doi.org/10.5962/bhl.part.14900
Gore, R.H. (1982) Porcellanid crabs from the coasts of Mexico and Central America (Crustacea: Decapoda: Anomura). Smithsonian Contributions to Zoology, 363, 1–34.
https://doi.org/10.5479/si.00810282.363
Gore, R.H. & Abele, L.G. (1974) Three new species of porcellanid crabs (Crustacea, Decapoda, Porcellanidae) from the Bay of Panama and adjacent Caribbean waters. Bulletin of Marine Science, 23 (3), 559–573.
Gore, R.H. & Abele, L.G. (1976) Shallow water porcelain crabs from the Pacific coast of Panama and adjacent Caribbean waters (Crustacea: Anomura: Porcellanidae). Smithsonian Contributions to Zoology, 237, 1–30.
https://doi.org/10.5479/si.00810282.237
Haig, J. (1957) The porcellanid crabs of the “Askoy” Expedition to the Panama Bight. American Museum Novitates, 1865, 1–17.
Haig, J. (1960) The Porcellanidae (Crustacea: Anomura) of the eastern Pacific. Allan Hancock Pacific Expedition, 24, 1–440.
Hiller, A. & Werding, B. (2007) Redescription of Petrolisthes edwardsii (de Saussure) and description of a new, sibling species from the eastern Pacific based on different colour, morphology and genetic identity (Crustacea: Anomura: Porcellanidae). Organisms Diversity & Evolution, 7 (3), 181–194.
https://doi.org/10.1016/j.ode.2006.06.002
Hiller, A. & Werding, B. (2010) Redescription of Petrolisthes militaris (Heller, 1862), with description of a new species from the Indo-West Pacific (Decapoda, Porcellanidae). Crustaceana Monographs, 14, 315–331.
https://doi.org/10.1163/9789047427759_021
Hiller, A. & Werding, B. (2016) A new species of the genus Petrolisthes Stimpson (Crustacea, Decapoda, Porcellanidae) from the Central Pacific, with remarks and new records for P. aegyptiacus Werding & Hiller. ZooKeys, 617, 19–29
https://doi.org/10.3897/zookeys.617.9893
Hiller, A. & Werding, B. (2019) A new species of Petrolisthes (Crustacea, Anomura, Porcellanidae) inhabiting vermetid formations (Mollusca, Gastropoda, Vermetidae) in the southern Caribbean Sea. ZooKeys, 876, 143–151.
https://doi.org/10.3897/zookeys.876.37244
Lockington, W.N. (1878) Remarks upon the Porcellanidea of the West Coast of North America. Annals of the Magazine of Natural History, Series 5, 2, 394–406.
https://doi.org/10.1080/00222937808682444
Mantelatto, F.L., Pileggi, L.G., Miranda, I. & Wehrtmann, I.S. (2011) Does Petrolisthes armatus (Anomura, Porcellanidae) form a species complex or are we dealing with just one widely distributed species? Zoological Studies, 50 (3), 372–384.
Naderloo, R. & Apel, M. (2014) A new species of porcelain crab, Petrolisthes tuerkayi n. sp. (Crustacea: Anomura: Porcellanidae), from the Persian Gulf. Zootaxa, 3881 (2), 190–194.
https://doi.org/10.11646/zootaxa.3881.2.7
Nobili, G. (1901) Viaggio del Dr. Enrico Festa nella Repubblica dell’Ecuador e regioni vicine, 23: Decapodi e Stomatopodi. Bollettino dei Musei di Zoologia ed Anatomia Comparata della R. Università di Torino, 16 (415), l–58.
Osawa, M. & Maenosono, T. (2011) Two species of the genus Petrolisthes (Decapoda: Anomura: Porcellanidae) from the Ryukyu Islands, southwestern Japan, with description of a new species. Bulletin of the National Museum of Nature and Science, Series A, Zoology, Supplement 5, 109–118.
Osawa, M. & McLAughlin, P.A. (2010) Annotated checklist of anomuran Decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea). Part II. Porcellanidae. The Raffles Bulletin of Zoology, 23, 109–129.
Osawa, M. & Uyeno, D. (2013) A new subtidal species of the genus Petrolisthes Stimpson, 1858 (Crustacea: Decapoda: Porcellanidae) from Okinawa, with an account of species of the genus known from the Ryukyu Islands, southwestern Japan. Zootaxa, 3670 (3), 329–338.
https://doi.org/10.11646/zootaxa.3670.3.3
Rodríguez, I.T., Hernández, G. & Felder, D.L. (2005) Review of the western Atlantic Porcellanidae (Crustacea: Decapoda: Anomura) with new records, systematic observations, and comments on biogeography. Caribbean Journal of Science, 41 (3), 544–582.
Stimpson, W. (1858) Prodromus descriptionis animalium evertebratum, quae in Expeditione ad Oceanum Pacificum Septentrionalem, a Republica Federata missa, Cadwaladaro Ringgold et Johanne Rodgers Ducibus, observavit et descripsit. Pars VII. Crustacea Anomoura. Proceedings of the Academy of Natural Sciences of Phiadelphia, 10, 225–252.
https://doi.org/10.5962/bhl.title.51447
Werding, B. & Hiller, A. (2015) Description of a new species of Petrolisthes in the Indo-West Pacific with a redefinition of P. hastatus Stimpson, 1858 and resurrection of P. inermis (Heller, 1862) (Crustacea, Anomura, Porcellanidae). ZooKeys, 516, 95–108.
https://doi.org/10.3897/zookeys.516.9923