Mosasaur
Mosasaurs (from Latin "Mosa" meaning the 'Meuse river', and Greek σαύρος "sauros" meaning 'lizard') are an extinct group of large marine reptiles containing 38 genera in total. Their first fossil remains were discovered in a limestone quarry at Maastricht on the Meuse in 1764. Mosasaurs probably evolved from an extinct group of aquatic lizards known as aigialosaurs in the Early Cretaceous. During the last 20 million years of the Cretaceous period (Turonian-Maastrichtian ages), with the extinction of the ichthyosaurs and pliosaurs, mosasaurs became the dominant marine predators. They became extinct as a result of the K-Pg event at the end of the Cretaceous period, about 66 million years ago.
Courtenay, British Columbia
The first major paleontological discovery in Courtenay occurred in 1988 when resident Mike Trask and his daughter discovered the first fossil of an 80-million-year-old Elasmosaur on the banks of the Puntledge River. Over the next few months, the excavation, led by Dr. Roif Ludvigson, revealed a near complete skeleton. The skull and other key bones for identifying the species were in poor condition, and it is still unknown as to what species or genus this Elasmosaur belonged. The original bones and a replica model are on display at the Courtenay & District Museum and Paleontology Center.