Rodzaj Tuba Lea, 1833
Gatunek typowy Opis Protoconch hyperstrophic, coaxial to strongly medioaxial, smooth. Teleoconch broadly cone−shaped with bulging whorls. Periphery and base rounded. First teleoconch whorl with 3–5 spiral ribs. Spiral ribs crossed by weaker, opisthocline to sinuous, axial ribs or threads or enhanced growth lines. At intersections ornamented with rounded, more or less coarse, nodules. Peristome round, apertural lip slightly channeled at columella. Umbilicus funnel shaped. Synonimy Zasięg czasowy Valanginian (Early Cretaceous) to Recent. Literatura Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. |
|