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.
Maniraptoriformes
Many nearly complete fossil maniraptoriforms are known from the late Jurassic. "Archaeopteryx" is known from Bavaria at 155-150 Ma. "Ornitholestes", the troodontid WDC DML 001, "Coelurus fragilis" and "Tanycolagreus topwilsoni" are all known from the Morrison Formation in Wyoming at about 150 Ma. The Daohugou biota, including "Anchiornis" and "Epidexipteryx", is the earliest record of maniraptoriformes, dating to about 160 Ma. One possible maniraptoriform, "Eshanosaurus", lived even earlier, during the Early Jurassic, though its identification is controversial.