Microchlamylla, 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 : 35-36

Microchlamylla gen. n. Figs 21, 30, 31

Type species.

Eolis gracilis Alder & Hancock, 1844

Etymology.

After micro- and chlamylla; in reference to the unusually long vas deferens of this genus typical for the genus Chlamylla of the family Paracoryphellidae , but smaller body size and discontinuous notal edge, common in the family Coryphellidae .

Diagnosis.

Body narrow. Notal edge present, moderately reduced, discontinuous, formed by a distinct series of lateral pieces. Cerata in several groups. Rhinophores smooth, similar in length or shorter than oral tentacles. Anterior foot corners present. Rachidian teeth with relatively wide cusp and distinct denticles. Lateral teeth denticulated without attenuated process basally. Separated distal and proximal receptaculum seminis. Long convoluted thin vas deferens expands distally to narrow penial sheath. Penis narrow, conical.

Species included.

Microchlamylla gracilis gracilis (Alder & Hancock, 1844), comb. n. (Fig. 30) (original description in Alder and Hancock 1844), Microchlamylla gracilis zfi subsp. n. (Fig. 31), Microchlamylla amabilis (Hirano & Kuzirian, 1991), comb. n. (original description in Hirano and Kuzirian 1991).

Remarks.

The genus Microchlamylla gen. n. is clearly delineated from all known taxa of the family Coryphellidae by a combination of narrow body with a discontinuous notal edge, smooth rhinophores, and long narrow vas deferens which forms several loops (Fig. 21). The molecular phylogenetic analysis places Microchlamylla gen. n. in a clade very distinct from the rest of the coryphellids (Figs 1, 2) with the only relatively close genus being Itaxia gen. n. The genus Microchlamylla gen. n. is comprised of two species which are morphologically quite similar but molecularly well delineated - the North Atlantic M. gracilis and North Pacific M. amabilis .