Gatunek typowy
Pterocera ornata Buvignier, 1852. Sequanian (Late Jurassic), Manjouy, Meuse, France.

Opis

Shell moderately large to small, spindle−like. Whorls rounded initially, later angulated and ornamented with spiral lirae. Body whorl with three keels, two upper whorls more or less nodose. Lower keel broadly setting, almost straight. At end of body whorl anterior canal  extending into spine−like process. Outer lip with four pointed, finger−like processes. Lateral processes being extensions of keels, uppermost one being extension of spiral rib that was covered by next whorl, bent parallel to spire, and often protruded backward.

Synonimy

Zasięg czasowy

Bajocian (Mid Jurassic) to Early Cretaceous.

Literatura

Cossmann, M. 1904.Essais de Paléoconchologie Comparée. Sixième Livraison.151 pp. M. Cossmann, F.R. de Rudeval, Paris.

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