Gatunek typowy

Opis

Type species: Rissoa unicarina Buvignier, 1843. Rauracian (Oxfordian, Late Jurassic), Saint Mihiel, France.
Small shell with spiral and axial sculpture, and spiral cords (usually 1–2) causing angulation of whorls. Peristome more weakly channeled anteriorly than in Rissoina. Protoconch multispiral dome−shaped.

Synonimy

Zasięg czasowy

Late Jurassic of Europe.

Literatura

Cossmann, M. 1921.Essais de Paléoconchologie Comparée. Douzième Livraison.348 pp. Cossmann, M., Paris.

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