Cosmocerithium lukovensis Kaim, 2004
Sugerowana cytacja: Gryz, P. 2020. Cosmocerithium lukovensis Kaim 2004. Ikonoteka (http://ikonoteka.paleo.pan.pl/xwiki/bin/view/Species/Cosmocerithium+lukovensis)
 Holotype MZ VIII Mg 4245/1 (holotype) from the Late Callovian (Mid Jurassic) of Łuków (block in glacial drift); lateral and apical view; white arrow indicate demarcation between protoconch and teleoconch. Diagnoza Protoconch with inflated axial ribs and weak spiral lirae. First whorl of teleoconch ornamented with strong axial ribs and weaker spiral ribs. Axial ribs disappearing later in ontogeny. Whorls of teleoconch rounded. Porównanie Similar to C. kosmai but differs in having more sturdy ribs of the protoconch and strong axial ribs on the first whorl of the teleoconch. C. kosmai has much stronger spiral lirae on its protoconch. Autekologia Występowanie geograficzne Only in type locality. Zasięg czasowy Quenstedtoceras lamberti Zone, Late Callovian (Mid Jurassic). Materiały muzealne 18 shells. Literatura Kaim, A. 2004. The evolution of conch ontogeny in Mesozoic open sea gastropods. Palaeontologia Polonica 62, 3–183. |
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