Rodzaj Carinathilda Gründel, 1997
Gatunek typowy Opis Protoconch hyperstrophic, highly medioaxial to almost coaxial, smooth or, in some species, with adapical and abapical, axial folds. Teleoconch broadly cone−shaped. First teleoconch whorl with two spiral ribs of which abapical one makes distinct angulation of whorls and changing into keel. Number of spiral ribs may increase during ontogeny. Spiral ribs crossed by weaker axial ribs or threads, at rib intersections, with or without weak nodes. Teleoconch surface covered with spiral microornamentation. Synonimy Zasięg czasowy Late Triassic to Late Cretaceous. Literatura Gründel, J. 1997a. Heterostropha (Gastropoda) aus dem Dogger Norddeutschlands und Nordpolens. I. Mathildoidea (Mathildidae). Berliner Geowissenschaftliche Abhandlungen, Reihe E25, 131–175. Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183 |
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