SilesianTriassic

Sauropterygia indet. assoc. Acrodus sp.

Middle Triassic, Lower Muschelkalk (Anisian), Gogolin Beds, Upper Silesia, Poland

This is the type of fossil I like best. The plate you see is a snapshot, a frozen image of a section of the seabed from 240 million years ago.

Between fragments of crushed, older sediment, pebbles, and crushed fragments of mollusk shells lies a Sauropterygia tooth, and almost at the edge of the plate, embedded almost vertically in the seabed, is a small Acrodus shark tooth (most likely Acrodus lateralis).

I mentioned the difficulties of identifying reptile teeth here.

Note on identification of fossilized bones from the Germanic Basin