Gatunek typowy
Stuoraxis lehmani Bandel, 1996. Early Carnian (Late Triassic), Stuores Alm, Italy.

Opis

Small shell (about 1 mm) consisting of rounded, evolute whorls overlapping only slightly with each other, forming shallow dextral coil with wide umbilicus. Aperture almost round, of simple outline, vertically oriented. Protoconch consisting of low conical larval shell with sinistral coil twisting into planispiral coil in final portion of larval whorl ornamented by transversal folds.  Apertural rim of pediveliger thickened.

Synonimy

Zasięg czasowy

Late Triassic to Mid Jurassic.

Literatura

Bandel, K. 1996. Some heterostrophic gastropods from Triassic St. Cassian Formation with a discussion on the classification of the Allogastropoda. Paläontologische Zeitschrift 70, 325–365.

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