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Cocorchestia fritzi (Stebbing, 1903) comb. nov. (Fig. 3) Talorchestia fritzi Stebbing, 1903: 925, pl. 60.��� Shoemaker, 1932: 184, fig. 1.��� Stephensen, 1948: 11.��� Ortiz, 1977: 9.��� Galan, 1984: 136 (PhD thesis).��� Wakabara & Serejo, 1998: 583 (checklist).��� Martin & Diaz, 2003: 339.��� Serejo, 2004: 25, 26.��� Ruffo & Krapp-Schickel, 2005: 37.��� Garc��a-Madrigal, 2007: 127, Appendix, 188.��� Foster et al., 2009: 216, Species List 21.1.��� Ortiz & Lalana, 2010: 87.��� Barro et al., 2013: 40 (checklist).��� Herrera, 2012: 9 (checklist).��� Martin et al., 2013: 1682, 1716, Appendix 1.��� Ortiz & Lalana, 2019: 67. Not Talorchestia fritzi. ��� Schellenberg, 1938: 211 (= ��� Talorchestia ��� tucurauna (M��ller, 1864)).���Monod, 1970: 31, figs 55���69 (= Cocorchestia sp., Santa Cruz Island, Galapagos).��� Peck, 1994: 61, key. Non-Taxonomic Citations Talorchestia fritzi.��� Oca��a et al., 2012: 32, 33, table 2 (ecology). Types. Syntypes, 5 specimens, USNM 28785, Cocos Island, Costa Rica (5��31���45������N 87��3���36������W). Additional material. 10 specimens, USNM 106205, about 200 specimens, USNM 106206 Type locality. Cocos Island, Costa Rica. Ecological type. Beach-hopper. Habitat. There is no information on habitat in the original description of Stebbing (1903) or in the subsequent description of Shoemaker (1932), the first reviewer. According to Oca��a et al. (2012) C. fritzi is living on sandy beaches. Size. 5���9 mm. Diagnosis (male). Based on Stebbing (1903) and Shoemaker (1932). Gnathopod 2 propodus palm transverse, rounded proximally, with large distal sinus, without proximal spine defining palm; dactylus not modified distally, blunt. Pereopod 7 not incrassate. Uropods 1 and 2 endopod each with marginal setae in one row. Telson with 4 robust setae per lobe. Remarks. Shoemaker (1932) had new material of this species from Costa Rica which indicated a very different morphology of the male gnathopod 2. However Shoemaker clearly indicated that his specimens were larger (and more mature) than those of Stebbing. Unfortunately Shoemaker only illustrated the anterior parts of his specimen. Both species (C. fritzi and C. margaritae) have an unmodified dactylus on male gnathopod 2 and uropods 1 and 2 with only one row of marginal setae on the endopods. Cocorchestia fritzi and C. margaritae each have a large distal sinus on the palm of male gnathopod 1. They differ in the distinctive proximal spine guarding the palm of male gnathopod 2 in P. margaritae. Species reported by Monod (1970) and Peck (1994) are not P. fritzi. However specimens from both records are available. The specimen which Monod (1970) illustrated has a differently shaped propodus on gnathopod 2, shorter and broader, almost round, with a shorter palm and dactylus and is similar to Platorchestia. Uropod 2 is also shorter than that of Stebbing (1903) and the ramus of uropod 3 is longer than the peduncle (shorter in illustration of Stebbing (1903)). They don���t appear to be the same species. Stebbing���s male was apparently about 9 mm. Monod doesn���t appear to give a size for his male. Distribution. Costa Rica. Isla da Coca (Stebbing 1903); Galapagos. Turtle Bay, Santa Cruz Island (Monod 1970), Isla Genovesa, Bahia Darwin (Peck 1994)., Published as part of Lowry, J. K. & Myers, A. A., 2022, Platorchestiinae subfam. nov. (Amphipoda, Senticaudata, Talitridae) with the description of three new genera and four new species, pp. 1-53 in Zootaxa 5100 (1) on page 9, DOI: 10.11646/zootaxa.5100.1.1, http://zenodo.org/record/6127681, {"references":["Stebbing, T. R. R. (1903) Amphipoda from Costa Rica. Proceedings of the United States National Museum, 26, 925 - 931, pls. 60 - 61. https: // doi. org / 10.5479 / si. 00963801.26 - 1341.925","Shoemaker, C. R. (1932) Notes on Talorchestia fritzi Stebbing. Journal of the Washington Academy of Sciences, 22 (7), 184 - 187.","Stephensen, K. (1948) Amphipods from Curacao, Bonaire, Aruba and Margarita. Studies on the Fauna Curacao, Aruba, Bonaire, Venezuelan Islands, 11, 1 - 20.","Ortiz, M. (1977) Invertebrados Marinos Bentonicos de Cuba. - I. Crustacea Amphipoda, Gammaridae. Ciencias, Series 8, 38, 3 - 10.","Galan, A. (1984) A systematic study of Amphipoda (Crustacea) of the Caribbean coast of Venezuela. Thesis doctoral, Department of Pure and Applied Biology, Imperial College of Science and Technology, London University, London, 422 pp.","Wakabara, Y. & Serejo, C. S. (1998) Malacostraca Peracarida. Amphipoda. Gammaridea and Caprellidea. In: Young, P. S. (Ed.), Catalogue of Crustacean of Brazil. Serie Livros 6, Museu Nacional, pp. 561 - 594.","Martin, A. & Diaz, Y. J. (2003) La fauna de anfipodos (Crustacea: Amphipoda) de las aguas costeras de la region oriental de Venezuela. Boletin. Instituto Espanol de Oceanografia, 19 (1 - 4), 327 - 344. [in Spanish]","Serejo, C. S. (2004) Talitridae (Amphipoda, Gammaridea) from the Brazilian coastline. Zootaxa, 646 (1), 1 - 29. https: // doi. org / 10.11646 / zootaxa. 646.1.1","Ruffo, S. & Krapp-Schickel, T. (2005) Catalogue of the amphipod collection in the Museo Civico di Storia Naturale Verona (Crustacea, Malacostraca). Museo Civico di Storia Naturale di Verona Serie Cataloghi, 3, 1 - 98.","Garcia-Madrigal, M. S. (2007) Annotated checklist of the amphipods (Peracarida: Amphipoda) from the tropical eastern Pacific. Contributiones Estudio Crustaceos Pacifico Este, 4 (2), 63 - 195.","Foster, J. M., LeCroy, S. E., Heard, R. W. & Rita Vargas, R. (2009) Gammaridean amphipods. In: DuMont, H. J. (Ed.), Marine Biodiversity of Costa Rica, Central America. Monographiae Biologicae, 89, pp. 265 - 274. https: // doi. org / 10.1007 / 978 - 1 - 4020 - 8278 - 8 _ 24","Ortiz, M. & Lalana, R. (2010) Distribucion de los anfipodos (Crustacea, Malacostraca, Peracarida) de los subordenes Gammaridea, Caprellidea e Hyperiidea, presentes en el Archipielago Cubano / Distribution of the amphipod crustaceans (Crustacea, Malacostraca, Peracarida) on the suborder. Revista da Investigaciones Matinas, 31 (2), 75 - 90.","Barro, A., Fonseca, E., Ortiz, M. & Lalana, R. (2013) Lista de los crustaceos marinos y estuarinos (Arthropoda, Crustacea) de Boca de Canasi, Mayabeque, Cuba List of marine and estuarine crustacean (Arthropoda, Crustacea) of Boca de Canasi, Mayabeque, Cuba. Revista Cubana de Ciencias, 2 (1), 38 - 42.","Herrera, H. W. (2012) CDF checklist of Galapagos terrestrial crustaceans. FCD Lista de especies de Crustaceos Terrestres de Galapagos. In: Bungartz, F., Herrera, H., Jaramillo, P., Tirado, N., Jimenez-Uzcategui, G., Ruiz, D., Guezou, A. & Ziemmeck, F. (Eds.), Charles Darwin Foundation Galapagos Species Checklist, 2012, pp. 1 - 9","Martin, A., Diaz, Y. J., Miloslavich, Escobar-Briones, P. E., Guerra-Garcia, J. M., Ortiz, M., Valencia, B., Giraldo, A. & Klein, E. (2013) Diversidad regional de Amphipoda en el Mar Caribe. Revista de Biologia, 61 (4), 1681 - 1720. https: // doi. org / 10.15517 / rbt. v 61 i 4.12816","Ortiz, M. & Lalana, R. (2019) Lista Taxonomica actualizada de los anfipodos (Crustacea, Peracarida) de Cuba. Revista de Investigaciones Marinas, 39 (2), 63 - 77. [http: // www. cim. uh. cu / rim /]","Schellenberg, A. (1938) Brasilianische Amphipoden, niit biologischen Bemerkungen. Zoologische Jahrbucher Abteilung fur Systematik, 71, 203 - 218, 5 figs.","Muller, F. (1864) Fur Darwin. Wilhelm Engelmann, Leipzig, 91 pp., 65 figs. https: // doi. org / 10.5962 / bhl. title. 168646","Peck, S. B. (1994) Diversity and zoogeography of the non-oceanic Crustacea of the Galapagos Islands, Ecuador (excluding terrestrial Isopoda). Canadian Journal of Zoology, 72 (1), 54 - 69. https: // doi. org / 10.1139 / z 94 - 009","Ocana, F. A., Apin, Y., Cala, Y., Vega, A., Fernandez, A. & Cordova, E. (2012) Distribucion espacial de los macroinvertebrados de playas arenosas de Cuba oriental. Revista de Investigaciones Marinas, 32 (1), 30 - 37. [in Spanish]"]}