Named By: Louis dollo - 1889.
Classification: Chordata, reptilia, Sauropsida, Squamata, Mosasauridae, Halisaurinae.
Species: P. ortliebi (type). P. ponpetelegans.
Size: Holotype skull estimated to be about 42 centimetres long. Skull of ponpetelegans about 50 centimetres long. Total body length roughly estimated about 3 meters long withy probable variance between species.
Known locations: Belgium - Craie de Ciply Formation. Japan - Hakobuchi Formation.
Time period: Maastrichtian of the Cretaceous.
Fossil representation: Partial remains, mostly of skulls.
is a genus of halisaurine mosasaur
known to have lived during the
latest stage of the Cretaceous. Halisaurine mosasaurs like
Phosphorosaurus were the smaller end of the scale in
terms of size,
but would have been fast and nimble predators of other creatures such
as fish and perhaps cephalopods such as squid.
For over the first hundred years that the genus was known, fossils of a single species, P. ortliebi were known from Europe. In 2015 however, a second species, P. ponpetelegans, was named from the Hakobuchi Formation of Hokkaido Japan.
- A new halisaurine mosasaur (Squamata: Halisaurinae) from Japan: the first record in the western Pacific realm and the first documented insights into binocular vision in mosasaurs. - Journal of Systematic Palaeontology. 14 (10): 809–839. - Takyuka Konishi, Michael W. Caldwell, Tomohiro Nishimura, Kazuhiko Sakurai & Kyo Tanoue - 2015.