Gatunek typowy

Opis

Type species: Teutonica grammani Schröder, 1992; original designation. Bajocian (Mid Jurassic), Osterfeld, northern Germany.
Embryonic and larval shell orthostrophic, cylindrical, barrel shaped, convexwhorl with impressed sutures. Initial whorls more or less planispirally coiled. Larval shell with adapicalspiral row of tubercules and axial, granulated riblets, extending from upper periphery to the abapical suture. Transition to teleoconch with sinuous growth lines and a sudden change in ornamentation. Turriculate teleoconch with numerous, convex whorls. Sculpture consisting of strong, peripheral salient axial ribs and/or faint spiral striae. Peristome rounded with obliquely situated anterior channel.

Synonimy

Zasięg czasowy

Bajocian to Callovian (Mid Jurassic)

Literatura

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

Schröder, M. 1992. Two Mesozoic ancestors of modern Triphoroidea (Gastropoda). Proceedings of the Tenth International Malacological Congress (Tübingen 1989) 2, 503–507.