Hexabranchus suezensis Abraham, 1876

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 : 731

Hexabranchus suezensis Abraham, 1876 (Fig. 26O)

Description notes Described from a preserved specimen; only external morphology provided: size 100 mm (preserved); body elliptical, smooth; mantle expanded around the whole body, wider posteriorly with a fimbriate edge; six non-retractile, small multi-pinnate gill leaves; oral tentacles fleshy, oval and multilobate; color light brownish in spirits. Own conclusion/opinion on its taxonomic status Abraham (1876) stated that this species is differentiated from H. praetextus and H. sanguineus by a more elongated shape and a more depressed body. Nevertheless, these characteristics may change with preservation and body position. The type location (Red Sea), smooth notum, and the well-defined six gill branches suggest that H. suezensis is indeed H. sanguineus . Hexabranchus suezensis was synonymized as H. sanguineus by Thompson (1972), confirmed by Valdés (2002) with which we concur.