Family SCAPHIDIODONTIDAE Deroux, n. fam.

Broad anterior end, with body gently tapered posteriorly; hypostomial frange similar to that of the Orthodonellidae (above), but simpler and less conspicuous; mostly marine forms.

[As in the case of the Nassulopsidae (above), this family is credited to Deroux; Jankowski (1975), once again, also proposed the familial name here, but without characterization.]

Chilodontopsis Blochmann, 1895 (syn. Chlamydodontopsis). Single (recognizable?) to several (in the literature) species.
Scaphidiodon Stein, 1859. Few species.