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IKBFU's Vestnik. Series: Natural Sciences

2025 Issue №2

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Vazhenin G. A. Bogatenko I. E. Gorodchikov S. V. Mychko E. V.

First finding of tooth of Ptychodus (Elasmobranchii: Lamniformes) in moraine of the Kaliningrad Region

DOI
10.5922/vestniknat-2025-2-8
Pages
130-141
Ptychodus shark teeth Cretaceous erratic boulders Kaliningrad Re­gion

Abstract

For the first time, a find of an incomplete tooth (a fragment of the crown) belonging to a Cretaceous shark of the genus Ptychodus has been discovered in the Kaliningrad Region, with­in boulder-pebble material along the seashore near Zelenogradsk. Previously, the geogra­phically closest remains of Ptychodus were known from Upper Cretaceous reworked deposits in Lithuania. The morphological features of the studied tooth suggest that it is a symphyseal tooth and may be classified as Ptychodus cf. latissimus Agassiz, 1835. This new find expands our knowledge of the distribution of Ptychodus during the Cretaceous period and enhances our understanding of the diversity of fossils found within the erratic boulders of the region.