Purpurina coronata
Sugerowana cytacja: Gryz, P. 2020. Purpurina coronata Hébert & Eudes-Deslongchamps 1860. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/viewrev/Species/Purpurina+coronata)
 Specimen MZ VIII Mg 4229/1 from the Callovian (Mid Jurassic) of Łuków (block in glacial drift) in lateral and apical view. Diagnoza Obtusely conical protoconch. Shell with wide whorls and possessing adapical ramp perpendicular to shell axis. Below angulation, teleoconch ornamented with strong, wide axial ribs (17–18 per whorl) and spiral ribs (4–5 per whorl). Peristome ellipsoidal with rounded anterior channel. Columellar lip with narrow callus. Porównanie Differs from P. formosa in having wider whorls, a perpendicular adapical ramp and a more weakly expressed anterior channel. Autekologia Występowanie geograficzne Europe; in Poland Łuków (block in glacial drift). Zasięg czasowy Callovian (Mid Jurassic). Materiały muzealne Material from Europe and four shells from Callovian of Łuków (block in glacial drift), Poland. Literatura Hébert, E. & Eudes-Deslongchamps, E. 1860. Mémoire sur les fossiles de Montreuil-Bellay (Maine-et-Loire). 1re. partie. Céphalopodes et Gastéropodes. Bulletin de la Société linnéenne de Normandie 5, 153–240 Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. |
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