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A New Species of the Genus Chelorchestia (Amphipoda, Talitridae) from Palma Island, Malaga Bay, Pacific Coast of Colombia

2008; Brill; Volume: 82; Issue: 1 Linguagem: Espanhol

10.1163/156854008x363768

1568-5403

Bellineth Valencia, Alan Giraldo,

Ocean Acidification Effects and Responses

A new species of talitrid amphipod, Chelorchestia colombiensis sp. nov., is described from the central zone of the Pacific coast of Colombia. Specimens examined were collected on the intertidal rocky shore associated with encrusting and filamentous algae. This new species of Chelorchestia differs from the other four described species, C. costaricana (Stebbing, 1906), C. vaggala (Bowman, 1977), C. darwinii (Muller, 1864), and C. forceps Smith & Heard, 2001 principally by the presence of well developed lobes on the ischium of the second gnathopod in males, as well as by the presence of two well developed rounded humps on the palm of the second gnathopod in males. Furthermore, variation was found in the length of antenna 2, uropod 1, uropod 2, and telson. Se describe una nueva especie de anfipodo talitrido, Chelorchestia colombiensis sp. nov., para la region central de la costa Pacifica colombiana. Los especimenes fueron colectados en la zona rocosa intermareal asociados a algas filamentosas e incrustantes. Esta nueva especie de Chelorchestia difiere de las otras cuatro especies descritas para el genero, C. costaricana (Stebbing, 1906), C. vaggala (Bowman, 1977), C. darwinii (Muller, 1864), y C. forceps Smith & Heard, 2001, principalmente por la presencia de un lobulo bien desarrollado en el isquio del segundo gnatopodo de los machos, y la presencia de dos tuberculos bien desarrollados en la palma del segundo gnatopodo de los machos. Adicionalmente, se encontraron diferencias en la longitud de la antena 2, urpodo 1, uropodo 2 y telson.