Gatunek typowy
Melania scalariformis Deshayes, 1832; Bajocian, France.

Opis

Medium to small, slender turriculate shells with more or less distinctly comered whorls; protoconch consisting of 3-5 whorls has two spiral ribs on its larval whorls and there may also be an omament of spirally arranged tubercules; whorls of the teleoconch initially have three, later five or more spiral ribs; numerous axial ribs are straight at frst and later curve with their anterior end that does not reach the base; the spiral lirae form tubercules where they cross axial ribs; apical row of tubercules just next to the suture usually increases in magnitude during shell growth; base is convex, continuous with the sides and is ornamented by 5-7 spiral lirae; aperture has an indistinct anterior notch and the outer lip forms a low rounded anterior projection. 

Synonimy

Zasięg czasowy

Triassic to Cretaceous.

Literatura

Cossmann, M. 1906. Essais de paléoconchologie comparée, vol. 7: 261 pp. F.R. de Rudeval, Paris

Gründel, J. 1999. Procerithiidae (Gastropoda) aus dem Lias und Dogger Deutschlands und Polens. Palaontologie, Stratigraphie, Fazies - Heft 7.- Freiberger Forschungshefte, C 481: I -37; Freiberg.