Spinophallus, Zamora-Silva & Malaquias, 2018

Zamora-Silva, Andrea & Malaquias, Manuel António E., 2018, Molecular phylogeny of the Aglajidae head-shield sea slugs (Heterobranchia: Cephalaspidea): new evolutionary lineages revealed and proposal of a new classification, Zoological Journal of the Linnean Society 183, pp. 1-51 : 40

GENUS SPINOPHALLUS GEN. NOV.

( FIGS 3M, 5B; TABLES 1 AND 2)

Type species: Philinopsis coronata Gosliner, 2011 . By subsequent designation.

Diagnosis: Live animals up to 15 mm in length. Body elongated, wide; cephalic shield blunt, quadrangular; reduced sensory bristles, not visible to the naked eye; posterior shield rounded, terminates in a medial, elongate, conical or bulbous posterior projection (autapomorphy); symmetrical caudal lobes, short, blunt; parapodia short ( Fig. 3M). Shell calcified, convex-dilated with open whorl ( Fig. 5B). Buccal bulb large, muscular, bulb-shaped. Penial sac with internal spines; penial papilla covered by scattered series of large spines (autapomorphy), or with a ring of rounded tubercles (autapomorphy) ( Rudman, 1972a; Gosliner, 2011).

Type locality: Batangas, The Philippines .

Etymology: The genus name (Lat. schedo = penis; spino = spines) refers to the spines present on the penial papilla or in the penial sac of species in this genus.