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Size comparison. Sachicasaurus was a large pliosaur, with the type specimen measuring approximately 10 metres (33 ft) long and weighing 17 metric tons (19 short tons). [1] [2] The holotype specimen, MP111209-1, was found in 2013 and is known from a near complete skull, and postcranial elements including a complete hindlimb and various vertebrae.
English: Size comparison of the giant Colombian pliosaurid Sachicasaurus vitae. Sachicasaurus is known from a nearly complete, articulated skeleton, and has been estimated to be around 10 metres (33 ft) in length. The silhouette was scaled based on skull measurements in Páramo-Fonseca et. al. (2018).
Size range of Mosasaurus compared with a human. The type species, M. hoffmannii, is one of the largest marine reptiles known, [25] [57] though knowledge of its skeleton remains incomplete as it is mainly known from skulls. [33]: 100 Russell (1967) wrote that the length of the jaw equalled one tenth of the body length in the species.
They ranged in size from some of the smallest known mosasaurs (Carinodens, 3–3.5 meters), to medium-sized taxa (Clidastes, 6+ meters), to the largest of the mosasaurs (Mosasaurus hoffmannii) potentially reaching about 13 m in length.
The smaller mosasaurs may have spent some time in fresh water, hunting for food. The largest mosasaur Mosasaurus hoffmannii was the apex predator of the Late Cretaceous oceans, reaching more than 11 metres (36 ft) in length and weighing up to 10 metric tons (11 short tons) in body mass. [14]
Mosasauroidea is a superfamily of extinct marine lizards that existed during the Late Cretaceous.Basal members of this group consist of small semiaquatic forms with terrestrial limbs ("plesiopedal"), while laters members include larger fully aquatic paddle-limbed ("hydropedal") forms commonly known as mosasaurs. [3]
In 1999, the size of Liopleurodon was greatly exaggerated in the BBC documentary series Walking with Dinosaurs, depicted as reaching 25 m (82 ft) in length. However, the different attributed specimens show that the animal could reach a size ranging from 4 to 8 m (13 to 26 ft) long, with some researchers estimating a maximum length of ...
Rhomaleosauridae is a stem-based taxon defined in 2010 (and in earlier studies in a similar manner) as "all taxa more closely related to Meyerasaurus victor than to Leptocleidus superstes, Pliosaurus brachydeirus or Polycotylus latipinnis". [2]