Bandellina laevissima
Sugerowana cytacja: Gryz, P. 2020. Bandellina laevissima Schröder 1995. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Bandellina+laevissima)
 Specimen ZPAL Ga.9/200 from the Valanginian (Early Cretaceous) of Wąwał in lateral, umbilical and apical view. Diagnoza Shell low-spired, turbinate. Protoconch sinistral, hyperstrophic with no ornamention. Terminal part of protoconch thickened. Teleoconch with thick wall, unornamented apart from prosocyrt growth lines. Suture adpressed. Peristome in one plane, inclined adapically, complete. Outer lip even, inner lip with two undulations. Umbilicus circular, wide open. Porównanie Differs from B. cassiana Bandel, 1996 in having a smaller number of protoconch whorls and clearly visible undulations of the inner lip. Autekologia Występowanie geograficzne Only in type locality. Zasięg czasowy Valanginian, Early Cretaceous. Materiały muzealne In ZPAL only two shells. Literatura Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. Schröder, M.1995. Frühontogenetische Schalen jurassicher und unterkretazischer Gastropoden aus Norddeutschland und Polen. Palaeontographica, Abteilung A 238, 1–95 |
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