The finspine of a fossil shark Tristychius found at the Woodside Pits. It is from the fin which projected upwards from the shark's back.
Tristychius lived during the early Carboniferous Period, 360-330 million years ago. Sharks were common during this period and their teeth and spines are abundant in the fossil record.
Reproduced with the permission of Glasgow City Council, Glasgow Museums
early Carboniferous Period, finspines, fossils, geology, sharks, Tristychius, Woodside Pits