Laevipilina antarctica

Laevipilina antarctica is a species of monoplacophoran, a superficially limpet-like marine mollusk. It is found in the Weddell Sea and the Lazarev Sea of Antarctica.
Evolution.
In 2006, a molecular study on "Laevipilina antarctica" suggested that extant Monoplacophora and Polyplacophora form a well-supported clade with the researched "Neopilina" closest to the chitons. The two classes in this new clade, with the proposed name Serialia, all show a variable number of serially repeated gills and eight sets of dorsoventral pedal retractor muscles.