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Article
Published: 2017-04-12

Synalpheus pinkfloydi sp. nov., a new pistol shrimp from the tropical eastern Pacific (Decapoda: Alpheidae)

Museu Paraense Emílio Goeldi, Campus de Pesquisa, Avenida Perimetral 1901, CEP 66077-830, Terra Firme, Belém, PA, Brazil Current address: Universidade Federal de Goiás, Instituto de Ciências Biológicas, Avenida Esperança s/n, Campus Samambaia - Prédio ICB5, CEP 74690-900, Goiânia, GO, Brazil
Biology Department, Seattle University, Seattle, WA 98122, USA
Oxford University Museum of Natural History, Parks Road, Oxford, OX1 3PW, United Kingdom
Crustacea Malacostraca Caridea snapping shrimp Pacific Ocean transisthmian taxa

Abstract

A new, conspicuously coloured species of the alpheid genus Synalpheus Spence Bate, 1888, is described based on material collected on the Pacific coast of Panama. Synalpheus pinkfloydi sp. nov. is closely related to the western Atlantic S. antillensis Coutière, 1909, the two taxa being transisthmian, cryptic sister species. Both species are characterised by the distal areas of their major and minor chelae coloured in an intense, almost glowing pink-red. The morphological differences between S. pinkfloydi sp. nov. and S. antillensis Coutière, 1909 are subtle, being limited to the slightly different proportions of the merus of both chelipeds, distodorsal armature of the major cheliped merus, relative length of the antennal scaphocerite, and body size. However, they are genetically different with a 10.2% sequence divergence in COI. Based on molecular clock estimates, these transisthmian taxa diverged around 6.8–7.8 mya, i.e. well before the final closure of the Isthmus of Panama 2.5–3 mya.

 

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How to Cite

ANKER, A., HULTGREN, K. M., & GRAVE, S. D. (2017). <em>Synalpheus</em> <em>pinkfloydi</em> sp. nov., a new pistol shrimp from the tropical eastern Pacific (Decapoda: Alpheidae). Zootaxa, 4254(1), 111–119. https://doi.org/10.11646/zootaxa.4254.1.7