Redescription ofTubulanus mawsoni(Wheeler 1940) comb. nov. (Palaeonemertea: Tubulanidae) from the Bellingshausen Sea (Antarctica)

Tubulanus mawsoni (Wheeler 1940) comb. nov. is redescribed based on the material collected during the Spanish Antarctic expedition Bentart-03 through the Bellingshausen Sea (Antarctica). Previously belonging to the genus Carinina Hubrecht 1885, the species is transferred to the genus Tubulanus based on the situation of the brain and lateral nerves between the basement membrane and the outer circular muscle layer, the presence of muscle crosses in the body wall, the position of the blood and excretory systems, the presence of proboscis nerves and the structure of the cerebral sensory organs, the rhynchocoel wall and the rhynchodaeal and buccal nerves. Microphotographs of the different regions of the body and the proboscis structure are provided for the first time. Based on the ambiguities between Tubulanus diagnosis and the species descriptions, as well as the possible paraphyletic status of the genus, the need for new morphological and molecular studies is suggested.http://zoobank.org/urn:lsid:zoobank.org...