Corella antarctica Sluiter 1905, n. sp.

• Main Author: Monniot, Françoise
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Ascidiacea; Enterogona; Corellidae; Corella; Corella antarctica; Antarc*; Antarctic; Antarctic Peninsula; Antarctica; Antarctique*; Anvers Island
• Online Access: https://doi.org/10.5281/zenodo.6149679; http://treatment.plazi.org/id/D258A4245138FFACFF312CFE2EBFB444

Corella antarctica Sluiter, 1905 Figures 1, 2. Material examined: - Booth Wandel Island, 40 m, Sluiter’s specimens in MNHN collections. - 62°16’ S – 58°34’W, 38 m, 21/12/1971 and 64° 47’ S – 64°07’ W, 64-100m 23/02/1972: Hero survey, USA. - 66° 67,62 S –72° 55,11 E, 525 m, 26/11/1985, SIBEX survey, IRD. - 65°99941 S–139°67942 E, 496 m and -66°53827 S–144°97250 E, 445m, CEAMARC French-Australian survey 2008–2009, Terre Adélie. - 66° 6759 S–139°89365 E 52 m, 15/10/2010; -66°37065 S–140°00218 E, 103m, 11/01/2011 and -66°36100 S–140° 0 1800 E, 131m, REVOLTA French survey, Mer Dumont d’Urville. The anatomical characters are described below from specimens from the “First Expedition Antarctique Française 1903-1905 ” (south to Anvers Island), the type location of the species. Several other specimens stored in the MNHN collections and recent material collected by the CEAMARC and REVOLTA surveys in Terre Adélie were also examined. Sluiter’s (1906) original description applies for all specimens examined except for the shape of the anus rim which Sluiter said to be smooth instead of lobed (Fig. 2 B,C) but errors are common by this author. The internal morphology is the same for specimens from the Antarctic Peninsula described by Alurralde et al. (2013) and for samples from Terre Adelie on the opposite side of the Antarctic continent. All specimens have an elongate shape laterally flattened with the oral siphon apical and the atrial siphon at 1/2 or 2/3 of the body length. The body size varies from a few centimetres to 25 cm. The tunic is smooth, soft, cartilaginous, not translucent in life, thicker in the basal part. The siphons are not protruding. Removed from the tunic both siphons are short tubes, the oral one with 7-8 low lobes and the atrial with 5–6 lobes, but the siphonal rim is often simply undulated. The oral and atrial sphincters are made of muscular fibres thinner than the body muscles. The longitudinal fibres of the siphons are short and do not extend to the lateral right body side. The right body wall is devoid ...