Borealia, Korshunova, Tatiana, Martynov, Alexander, Bakken, Torkild, Evertsen, Jussi, Fletcher, Karin, Mudianta, I Wayan, Saito, Hiroshi, Lundin, Kennet, Michael Schroedl, & Picton, Bernard, 2017

Korshunova, Tatiana, Martynov, Alexander, Bakken, Torkild, Evertsen, Jussi, Fletcher, Karin, Mudianta, I Wayan, Saito, Hiroshi, Lundin, Kennet, Michael Schroedl, & Picton, Bernard, 2017, Polyphyly of the traditional family Flabellinidae affects a major group of Nudibranchia: aeolidacean taxonomic reassessment with descriptions of several new families, genera, and species (Mollusca, Gastropoda), ZooKeys 717, pp. 1-139 : 22-23

Borealia gen. n. Figs 16, 17

Type species.

Coryphella nobilis Verrill, 1880

Etymology.

After boreo (north in Latin) because of the amphiboreal distribution of the two species included.

Diagnosis.

Body wide. Notal ridge present, reduced, continuous. Cerata in continuous rows. Rhinophores wrinkled. Anterior foot corners present. Rachidian teeth with compressed narrow cusp and distinct denticles. Lateral teeth denticulated with attenuated process basally. Separated distal and proximal receptaculum seminis. Moderately long vas deferens expands to narrow penial sheath. Penis narrow, tubular.

Species.

Borealia nobilis (Verrill, 1880), comb. n. (Fig. 16) (original description in Verril, 1880, detailed redescripton in Kuzirian 1977), Borealia sanamyanae sp. n. (Fig. 17).

Remarks.

The genus Borealia is clearly distinguished from any other Coryphellidae by a combination of continuous notal edge, long tubular penis, and compressed cusp of the rachidian radular teeth. In this study we discovered a closely related but clearly distinct (according to molecular data) new species of the genus Borealia from the North Pacific which forms separate sister clade to B. nobilis (Fig. 1).