The extinct Nerineoidea and Acteonelloidea (Heterobranchia, Gastropoda): a palaeobiological approach Author Kollmann, Heinz A. text Geodiversitas 2014 2014-09-26 36 3 349 383 http://dx.doi.org/10.5252/g2014n3a2 journal article 6397 10.5252/g2014n3a2 5dd903f5-b398-4a17-83e5-364766291411 1638-9395 4538503 Superfamily NERINEOIDEA Zittel, 1873 Nerineoidea Zittel, 1873: 328 . SUPERFAMILY CHARACTERS . — Shells turriculate to oviform, of medium size to large. Whorls concave to moderately convex. Growth lines adapically reflected. Aperture with expanded inductura, narrow subsutural notch and siphonal notch or canal; plaits, if present, most prominent before the final 1½ whorls, decreasing in size towards aperture.