Gatunek typowy
Tornatella fragilis Dunker, 1847. Liassic (Early Jurassic), vicinity of Halberstadt, Germany

Opis

Shell ovate with short conical spire. Whorls separated by flattened ramp. Aperture wide, constricted posteriorly and widened anteriorly. Inner lip covering slightly bent columella and forming low, narrow fold in its anterior part and narrow slit on spindle. Early whorls consisting  of sinistrally coiled, low−spired shell attached to teleoconch at angle of about 90°.

Synonimy

Zasięg czasowy

Carnian (Late Triassic) to Valanginian (Early Cretaceous).

Literatura

Ammon von L. 1878. Die Gastropoden des Hauptdolomites und des Plattenkalkes der Alpen. Abhandlungen des zoologisch mineralogischen Vereins Regensburg 11, 1-72.

Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183.