The occurrence of the parasitic amphipod Trischizostoma crosnieri Lowry & Stoddart, 1993 (Amphipoda: Amphilochidea: Lysianassida) in a methane seep site in the southeastern Pacific

Jorge Pérez-Schultheiss, Javier Sellanes

Submited: 2020-03-16 18:14:56 | Published: 2021-05-03 17:51:37

DOI: https://doi.org/10.3856/vol49-issue2-fulltext-2536

Abstract


The genus Trischizostoma Boeck, 1861 is a cosmopolitan group of parasitic and symbiotic aristoidean amphipods whose distribution is poorly known, with scarce specimens reported principally from pelagic environments until 3655 m depth. In this note, Trischizostoma crosnieri Lowry & Stoddart,1993, a species described for the southwest Pacific, is recorded for the first time in the southeast Pacific. The species was known previously only from a female specimen, described from the Philippines, with two additional unpublished records from the east coast of Australia and Tasmania. The specimens studied herein were obtained at 874 m depth, 36 nm to the northwest of Concepción, Biobío Region, in a methane seep site. However, the relationship between this species with this particular habitat is still uncertain. The genus Trischizostoma has been cited for the Nazca and Salas y Gómez ridges; nevertheless, our finding constitutes the first record of a species at the continental margin off Chile, raising to four the known species of the genus for Chilean waters.

Pérez-Schultheiss J, Sellanes J. The occurrence of the parasitic amphipod Trischizostoma crosnieri Lowry & Stoddart, 1993 (Amphipoda: Amphilochidea: Lysianassida) in a methane seep site in the southeastern Pacific. Lat. Am. J. Aquat. Res.. 2021;49(2): 365-368. Available from: doi:10.3856/vol49-issue2-fulltext-2536 [Accessed 18 Jun. 2021].
Pérez-Schultheiss, J., & Sellanes, J. (2021). The occurrence of the parasitic amphipod Trischizostoma crosnieri Lowry & Stoddart, 1993 (Amphipoda: Amphilochidea: Lysianassida) in a methane seep site in the southeastern Pacific. Latin American Journal of Aquatic Research, 49(2), 365-368. doi:http://dx.doi.org/10.3856/vol49-issue2-fulltext-2536