Abstract
We compared morphological features in 122 specimens of the Synalpheus townsendi species complex from the Caribbean, Gulf of Mexico and eastern Pacific. Our objectives were to examine the taxonomy of S. townsendi townsendi, S. t. mexicanus, S. t. brevispinis and S. t. peruvianus, which we felt have not been appropriately described and to reconsider their status. Based on examination of type material and different characters, we conclude that these taxa should be treated as distinct species, S. townsendi Coutière, 1909; S. mexicanus Coutière, 1909, S. brevispinis Coutière, 1909 and S. peruvianus Rathbun, 1910. We agree with Dardeau, 1986, that S. scaphoceris Coutière, 1910, is a distinct species. Specimens identified as S. townsendi productus Coutière, 1909, overlap in morphology with typical S. townsendi, and therefore are not considered to warrant designation as a separate taxon. Synalpheus mexicanus is not endemic to the Gulf of California.References
Banner, D.M. & Banner, A.H. (1975) The alpheid shrimps of Australia. Part 2. The genus Synalpheus. Records of the Australian Museum, 29(12), 267–389.
Carvacho, A. & Ríos, R. (1982) Los camarones carídeos del Golfo de California. II. Catálogo, claves de identificación y discusión biogeográfica. Anales del Instituto de Ciencias del Mar y Limnología, UNAM, 9(1), 279–291.
Chace, F.A. Jr. (1937) The Templeton Crocker Expedition. VII. Caridean decapod Crustacea from the Gulf of California and the west coast of Lower California. Zoologica, 22(2), 109–138.
Chace, F.A. Jr. (1972) The shrimps of the Smithsonian-Bredin Caribbean Expeditions with a summary of the West Indian shallow-water species (Crustacea: Decapoda: Natantia). Smithsonian Contributions to Zoology, 98, 1–179.
Chace, F.A. Jr. (1988) The caridean shrimps of the Albatross Philippine expedition, 1907–1910, Part 5: Family Alpheidae. Smithsonian Contributions to Zoology, 466, 1–99.
Christoffersen, M.L. (1979) Decapod Crustacea: Alpheoida. Resultats Scientifiques des Campagnes de la Calypso. Fascicule 11. Campagne de la Calypso au large des Côtes Atlantiques de l’Amerique du Sud (1961–1961). I. No. 36. Annales de l’Institut Océanographique, Monaco, new series, 55, 297–377.
Coutière, H. (1909) The American species of snapping shrimps of the genus Synalpheus. Proceedings of the United States National Museum, 36(1659), 1–93.
Coutière, H. (1910) The snapping shrimps (Alpheidae) of the Dry Tortugas, Florida. Proceedings of the United States National Museum, 37(1716), 485–487.
Hay, W.P. & Shore, C.A. (1918) The decapod crustaceans of Beaufort, N.C., and the surrounding area. Bulletin of the United States Bureau of Fisheries, 35 (for 1915 and 1916), 369–475.
Hendrickx, M.E. (1992) Distribution and zoogeographic affinities of decapod crustaceans of the Gulf of California, Mexico. Proceedings of the San Diego Society of Natural History, 20, 1–12.
Hendrickx, M.E. (1993) Crustáceos decápodos del Pacífico mexicano. In: Salazar-Vallejo, S.K. & González, N.E. (Eds.), Biodiversidad marina y costera de México. CONABIO and CIQRO: México, pp. 271–318
Lemaitre, R. & lvarez-León, R. (1992) Crustáceos decápodos del Pacífico colombiano: lista de especies y consideraciones zoogeográficas. Anales del Instituto de Investigaciones Marinas de Punta de Betín, 21, 33–76.
Méndez, M. (1981) Claves de identificación y distribución de los langostinos y camarones (Crustacea: Decapoda) del mar y ríos de la costa del Perú. Boletin del Instituto del Mar del Perú, 5, 1–170.
Pequegnat, L.H. & Ray, J.P. (1974) Crustacea and other arthropods. In: Bright, T. & Pequegnat, L. (Eds). Biota of the West Flower Garden Bank. Gulf Publishing Company, Houston, pp. 231–288
von Prahl, H. (1986) Crustáceos decápodos, asociados a diferentes habitats en la Ensenada de Utíra, Chocó, Colombia. Actualidades Biológicas, 15, 95–99.
Rathbun, M. (1910) The stalk-eyed Crustacea of Peru and the adjacent coast. Proceedings of the United States National Museum, 38 (1766), 531–620.
Ray, J.P. (1974) A study of the coral reef crustaceans (Decapoda and Stomatopoda) of two Gulf of Mexico reef systems: West Flower Garden, Texas and Isla de Lobos, Veracruz, Mexico. Ph.D. dissertation, Texas A&M University, College Station.
Ríos, R. (1992) Camarones carideos del Golfo de California. VI. Alpheidae del Estuario de Mulege y de Bahía Concepción, Baja California Sur, Mexico (Crustacea: Caridea). Proceedings of the San Diego Society of Natural History, 14, 1–13.
Rodríguez Almaraz, G. A., Gallardo Tejeda, W. & Campos, E. (2002) Crustáceos decápodos intermareales de la isla Carmen, Baja California Sur, México, con notas sobre su distribución ecológica. In: Hendrickx, M.E. (Ed.), Contributions to the study of East Pacific crustaceans, Vol. 1, Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, pp 255–264.
Rodríguez de la Cruz, M. C. (1987) Crustáceos decápodos del Golfo de California. Secretara de Pesca, México, 306 pp.
Steinbeck, J. & Ricketts, E.F. (1941) Sea of Cortez. Viking Press, New York, 598 pp.
Villalobos-Hiriart, J.L. (2000) Estudio monográfico de los crustáceos decápodos no braquiuros de la zona intermareal de las islas del Golfo de California, México. Tesis, Universidad Nacional Autónoma de México, México, 304 pp.
Villalobos-Hiriart, J.L., Nates-Rodríguez, J.C., Cantú Díaz-Barrica, A., Valle-Martínez, M.D., Flores Hernnádez, P., Lira-Fernndez E. & Schmidtsdorf Valencia, P. (1989) I. Crustáceos estomatápodos y decápodos intermareales de las islas del Golfo de California, México. Listados Faunísticos de México. Instituto de Biología, Universidad Nacional Autónoma de México, México, D.F., 114 pp.
Wicksten, M.K. (1983) Shallow water caridean shrimps of the Gulf of California, Mexico. Allan Hancock Foundation Monographs, 13, 1–59.
Wicksten, M.K. & Hendrickx, M.E. (2003) An updated checklist of benthic marine and brackish water shrimps (Decapoda: Penaeoidea, Stenopodidea, Caridea) from the eastern tropical Pacific. In: Hendrickx, M.E. (Ed.), Contributions to the study of East Pacific crustaceans , Vol. 2, Unidad Academica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, México, pp. 49–76.
Williams, A.B. (1965) Marine decapod crustaceans of the Carolinas. U.S. Department of Commerce Fishery Bulletin, 65, 1–298.
Williams, A.B. (1984) Shrimps, lobsters, and crabs of the Atlantic coast. Smithsonian Institution Press, Washington, D.C., 550 pp.