See text Basilissa (Ancistrobasis) Dall, 1889 (original rank) Ancistrobasis is a genus of sea snails, and marine gastropod mollusks in the family Seguenziidae.

[2] Dall (1889) regarded (with some doubt) Ancistrobasis as a section of the closely related genus Basilissa Watson, 1879.

The midwhorl angulation and the spiral lirae are present on all whorls.

The umbilical septum (a transverse plate secreted with early formed whorls of the shell) is absent.

Radula: The rachidian tooth is broader than high with lateral wings prominent.