(Big head lizard).
Named By: B. A. Schumacher, K. Carpenter & M. J. Everhart - 2013.
Classification: Chordata, Reptilia, Sauropterygia, Plesiosauria, Pliosauridae, Brachaucheninae.
Species: M. eulerti (type).
Size: Holotype skull about 170 centimetres long.
Known locations: USA, Kansas - Carlile Shale Formation, Greenhorn Limestone Formation.
Time period: Turonian of the Cretaceous.
Fossil representation: Skull and partial post cranial remains.
type specimen of Megacephalosaurus was originally
assigned to the
genus, leading to the idea that Brachauchenius
of the biggest of its time. The removal of this skull has led to a
size revision of Brachauchenius, and the
establishment of a new
genus, Megacephalosaurus. However this still
means that there were
still some large pliosaurs
in the oceans of the early portion of the
late Cretaceous, our definition of names is just different.
Megacephalosaurus was a very large pliosaur, and even though a complete skeleton is unknown, the one hundred and seventy centimetre skull of the holotype individual is proof of this. Megacephalosaurus was of a size that meant it could tackle other prey, perhaps even focused upon other marine reptiles.
- A new Cretaceous pliosaurid (Reptilia, Plesiosauria) from the Carlile Shale (Middle Turonian) of Russell County, Kansas. - Journal of Vertebrate Paleontology 33(3):613-628. - B. A. Schumacher, K. Carpenter & M. J. Everhart - 2013.
- Morphological and phylogenetic aspects of the dentition of Megacephalosaurus eulerti, a pliosaurid from the Turonian of Kansas, USA, with remarks on the cranial anatomy of the taxon. - Geological Magazine. - Daniel Madzia, Sven Sachs and Johan Lindgren - 2018.