Pseudomelania trochiformis (Piette, 1857)
Sugerowana cytacja: Gryz, P. 2020. Pseudomelania trochiformis (Piette, 1857) . Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/view/Species/Pseudomelania+trochiformis)
 Specimen ZPAL Ga.9/24 from the Valanginian (Early Cretaceous) of Wąwał in lateral view. Diagnoza Protoconch with dome-shaped apex. Both protoconch and teleoconch not ornamented. Demarcation between protoconch and teleoconch not visible. Shell glossy, slender, tower-like withnot incised suture and with flat whorls. Porównanie The shells from Wąwał are very similar to the juvenile shell of P. laubei. The species differs from P. paucispira in having a more shallow suture and multispiral protoconch. Autekologia Występowanie geograficzne Europe; in Poland found only in Wąwał Zasięg czasowy Bathonian (Mid Jurassic) to Valanginian (Early Cretaceous); in Poland only Valanginian. Materiały muzealne ZPAL: 110 shells. Literatura Cossmann, M. 1885. Contributionàl’étude de la faune de l’étage Bathonien en France (Gastropoda). Mémoires de la Société Géologique de France 3, 1–374. Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. Piette, M. 1857. Description des Cerithium enfois dans les dépôts bathoniens de l’Aisne et des Ardennes. Bulletin de la Société Géologique de France. Série 2 14, 544–562. |
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