Sinuitidae

Sinuitidae is an extinct family of Paleozoic molluscs of uncertain position. They had isostrophically coiled shells.

Taxonomy

The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 categorizes Sinuitidae in the superfamilia Bellerophontoidea within the
Paleozoic molluscs of uncertain systematic position with isostrophically coiled shells (Gastropoda or Monoplacophora).
This family consists of the following subfamilies :

Sinuitinae Dall, 1913 - synonym: Protowarthiidae Ulrich & Scofield, 1897
Aiptospirinae Wang, 1980
Hispanosinuitinae Frýda & Gutierrez-Marco, 1996

Genera

Genera in the family Sinuitidae include:Sinuites Koken, 1896 - type genus of the family Sinuitidae. Genus Sinuites has large aperture, its outer lip is bilobate. The dorsal side is convex. The umbilicus is closed.