Hexabranchus mauritiensis Abraham, 1877

Tibiriçá, Yara, Pola, Marta, Pittman, Cory, Gosliner, Terrence M., Malaquias, Manuel A. & Cervera, Juan Lucas, 2023, A Spanish dancer? No! A troupe of dancers: a review of the family Hexabranchidae Bergh, 1891 (Gastropoda, Heterobranchia, Nudibranchia), Organisms Diversity & Evolution (New York, N. Y.) 23 (4), pp. 697-742 : 732

Hexabranchus mauritiensis Abraham, 1877

Description notes External morphology and brief radula description with no illustration; based on preserved specimens: maximum size 75 mm; body elliptical, moderately depressed, smooth; mantle expansion fimbriate, except anteriorly; seven to eight non-retractile tripinnate gill leaves arranged in a circle around the anus; oral tentacles fleshy, leaf-like with a crenate edge; color in alcohol grayish-white; radula with 30 rows of numerous hamate teeth; teeth less curved than in H. aneiteumensis .

Own conclusion/opinion on its taxonomic status The number of gill branches and location suggest this species is H. lacer . Nevertheless, the description does not provide sufficient details to determine which species the author was referring to. Therefore, this name should be considered a nomen dubium.