Himatina Thiele, 1931

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 : 35

Himatina Thiele, 1931 Figs 21, 28

Type species.

Himatella trophina Bergh, 1894

Diagnosis.

Body moderately wide. Notal ridge present, reduced, continuous. Cerata in continuous rows. Rhinophores perfoliated. Anterior foot corners present. Rachidian teeth with moderately compressed narrow cusp and distinct denticles. Lateral teeth denticulated with attenuated process basally. Distal and proximal receptaculum seminis. Short vas deferens expands to broad penial sheath. Penis broad, discoid.

Species included.

Himatina trophina (Bergh, 1894) (Fig. 28) (original description in Bergh 1894).

Remarks.

The genus Himatina Thiele, 1931 was established as a replacement ( Thiele 1931) for a single species Himatella trophina Bergh, 1894 and possesses a unique combination of morphological and molecular characteristics (Figs 1, 2). Himatina trophina is a wide-bodied coryphellid with continuous notal edge, perfoliated rhinophores and very short vas deferens and broad penis (Fig. 21). According to our molecular phylogenetic analysis Himatina forms a separate clade basally to the genera Fjordia and Gulenia . These morphological and molecular data clearly delineate Himatina from all known Atlantic and Pacific coryphellids.