Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications

MAGGIONI, TAMARA; REYNA, PAOLA; CALCAGNO, EMILIA; TAVERNA, ANABELA; ALURRALDE, GASTÓN; RIMONDINO, CLARA; LAGGER, CRISTIAN; TATIÁN, MARCOS

ZOOTAXA

MAGNOLIA PRESS

Lugar: Auckland; Año: 2022 vol. 5093 p. 296 - 314

1175-5326

Deep-sea benthic communities from the Weddell Sea, Antarctica, were sampled in January?April 2005 in an area located between 61°S?70°S and 0°W?49°W. We found a total of eight ascidian species that belong to five different families, of which one corresponded to a new species. These were: Protoholozoa pedunculata Kott, 1969; Corynascidia suhmi Herdman, 1882; Styela andeepensis Maggioni & Tatián sp. nov.; Culeolus suhmi Herman, 1881; Culeolus anonymus Monniot F. & Monniot C., 1976; Culeolus likae Sanamyan K. & Sanamyan N., 2002; Oligotrema lyra (Monniot C. & Monniot F., 1973) and Asajirus indicus (Oka, 1913). We report: the extension of the known distribution ranges of P. pedunculata, Corynascidia suhmi, Culeolus suhmi, C. likae and A. indicus, being the first time they are collected from the Weddell Sea; and the shallowest record of C. likae. Six species were added to the list of ascidians of the Weddell Sea, being all deep-sea representatives. While the total number of ascidian species augmented from 43 to 49, the number of deep-sea representatives increased from 23 to 29. Our findings, thus, reinforce the need of performing more deep-sea prospections in the area.