A review of Southern Ocean squids using nets and beaks

• Published in: Marine Biodiversity
• Main Author: Cherel, Yves
• Other Authors: Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2020
• Subjects: Antarctica; Biogeography; Cephalopods; Predators; Taxonomy; Trophic relationships; [SDE]Environmental Sciences; Antarctic; Southern Ocean; Antarc*
• Online Access: https://hal.science/hal-03003342; https://doi.org/10.1007/s12526-020-01113-4

International audience This review presents an innovative approach to investigate the teuthofauna from the Southern Ocean by combining two complementarydata sets, the literature on cephalopod taxonomy and biogeography, together with predator dietary investigations.Sixty squids were recorded south of the Subtropical Front, including one circumpolar Antarctic (Psychroteuthis glacialis Thiele,1920), 13 circumpolar Southern Ocean, 20 circumpolar subantarctic, eight regional subantarctic, and 12 occasional subantarcticspecies. A critical evaluation removed five species from the list, and one species has an unknown taxonomic status. The 42Southern Ocean squids belong to three large taxonomic units, bathyteuthoids (n = 1 species), myopsids (n = 1), and oegopsids(n = 40). A high level of endemism (21 species, 50%, all oegopsids) characterizes the Southern Ocean teuthofauna. Seventeenfamilies of oegopsids are represented, with three dominating families, onychoteuthids (seven species, five endemics),ommastrephids (six species, three endemics), and cranchiids (five species, three endemics). Recent improvements in beakidentification and taxonomy allowed making new correspondence between beak and species names, such as Galiteuthis suhmi(Hoyle 1886), Liguriella podophtalma Issel, 1908, and the recently described Taonius notalia Evans, in prep. Gonatusphoebetriae beaks were synonymized with those of Gonatopsis octopedatus Sasaki, 1920, thus increasing significantly thenumber of records and detailing the circumpolar distribution of this rarely caught Southern Ocean squid. The review extendsconsiderably the number of species, including endemics, recorded from the Southern Ocean, but it also highlights that thecorresponding species to two well-described beaks (Moroteuthopsis sp. B and Psychroteuthis sp. B) are still unknown.