Abstract
In this paper we describe a new species from Brazilian waters, Ampithoe suapensis sp. nov., from Pernambuco State, Brazil. This species is readily separated from its congeners by the following states of characters: mandible with palp slender, with 2 long setae on distal margin of article 3; gnathopod 2 propodus oval with palm densely setose, extremely acute and lacking ornamentation, peduncle of male uropod 1 with a blunt interramal process. Also, a key for the Ampithoe species found in Brazilian waters is provided.
References
- Audouin, V. (1926) Explication sommaire des planches de Crustacés de l´Egypte et de la Surie, publiées par Jules-César Savigny, offrant un exposé des caractère naturels des genres avec la distinction des espèces. In: Description de l´Egypte, our recueil des observations et des recherches qui ont été faites en Egypte pendants l´expédition de l´armée francaise, histoire naturelle. Imprimerie royale, Paris, pp. 77–98. - Andrade, L.F. & Senna, A.R. (2013) A new species of Cymadusa Savigny, 1816 (Crustacea: Amphipoda: Ampithoidae) from northeastern Brazil. Nauplius, 21 (1), 53–63. 
 http://dx.doi.org/10.1590/S0104-64972013000100007- Barnard, J.L. (1958) Index of the families, genera and species of the gammaridean Amphipoda (Crustacea). Occasional paper of Alan Hancock Foundation Publications, 19, 1–145. - Barnard, J.L. (1970) Sublittoral Gammaridea (Amphipoda) of the Hawaiian Islands. Smithsonian Contributions to Zoology, 34, 1–286. 
 http://dx.doi.org/10.5479/si.00810282.34- Coleman C.O. (2003) ‘Digital inking’: how to make perfect line drawings on computers. Organisms, Diversity and Evolution 3 (Electronic Supplement 14), 1–14. - Conlan, K.E. & Bousfield, E. (1982) The amphipod superfamily Corophioidea in the northeastern pacific region, family Ampithoidae: systematics and distributional ecology. Publications in Biological Oceanography, National Museum of Canada, 10, 45–75. - Hughes, L.E. & Lowry, J.K. (2009) Ampithoidae. In: Lowry, J.K. & Myers, A.A. Benthic Amphipoda (Crustacea: Peracarida) of the Great Barrier Reef, Australia. Zootaxa, 2260, 153–219. - Latreille, P.A. (1816) Amphipoda. In: Nouveau Dictionaire d'histoire naturelle, appliquée aux Arts, à l'Agriculture, à l'Économie rurale et domestique, à la Médecine, etc. Par une société de Naturalistes et d'Agriculteurs. Vol. 1. 2nd Edition. Deterville, Paris, pp. 467–469. - Leach, W.E (1814) Crustaceology. Appendix. The Edinburgh Encyclopaedia, 7, 429–434. - Lowry, J.K. & Myers, A.A. (2013) A Phylogeny and Classification of the Senticaudata subord. nov. (Crustacea: Amphipoda). Zootaxa, 3610 (1), 1–80. 
 http://dx.doi.org/10.11646/zootaxa.3610.1.1- Milne Edwards, H. (1830) Extrait de recherches pour server a l'histoire naturelle des crustaces amphipodes. Annales des Sciences Naturelles, 20, 353–399, pls 10, 11. - Myers A.A. (1985). Shallow-water, coral reef and mangrove Amphipoda (Gammaridea) of Fiji. Records of the Australian Museum, 5 (Supplication), 1–143. 
 http://dx.doi.org/10.3853/j.0812-7387.5.1985.99- Peart, R.A. (2007) A review of the Australian species of Ampithoe Leach, 1814 (Crustacea: Amphipoda: Ampithoidae) with descriptions of seventeen new species. Zootaxa, 1566, 1–95. - Poore, A.G.B. & Lowry, J.K. (1997) New ampithoid Amphipods from Port Jackson, New South Wales, Australia (Crustacea: Amphipoda : Ampithoidae). Invertebrate Taxonomy, 11, 897–941. 
 http://dx.doi.org/10.1071/IT95045- Serejo, C.S. & Licínio, M.V.S. (2002) The genus Ampithoe (Crustacea, Amphipoda, Ampithoidae) from the Brazilian coast. Arquivos do Museu Nacional, 60, 41–50. - Shoemaker, C.R. (1933) Two new genera and six new species of Amphipoda from Tortugas. Papers of the Tortugas Laboratory. Carnegie Institute of Washington, 28, 245–256. - Stebbing, T.R.R. (1899) Amphipoda from the Copenhagen Museum and other sources. Part II. Transactions of the Linnean Society of London, Series 2, 7, 395–432. 
 http://dx.doi.org/10.1111/j.1096-3642.1899.tb00202.x- Wakabara, Y. & Serejo, C.S. (1998) Malacostraca, Peracarida. Amphipoda. Gammaridea and Caprellidea. In: Young, P.S. (Ed.), Catalogue of Crustacea of Brazil. Rio de Janeiro, Museu Nacional, Série Livros, 6, 561–594. - Watling, L. (1989) A classification of crustacean setae based on the homology concept. In: Felgenhauer, B.E., Thistle, A.B. & Watling, L. (Eds.), Crustacean Issues. Vol 6. Functional Morphology of Feeding and Grooming in Crustacea. A.A. Balkema, Rotterdam, pp. 15–26. 
 
		