Halisaurus
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Halisaurus is an extinct genus of mosasaur named by Othniel Charles Marsh in 1869. The holotype, consisting of an angular and a basicranium fragment discovered near Hornerstown, New Jersey, already re
Thermopolis mosasaur
Restoration of H. arambourgi, the most completely known species of the genus.
Front-flipper of H. arambourgi
Skeleton of H. arambourgi
Mosasaur
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Mosasaurs are an extinct group of large aquatic reptiles within the family Mosasauridae that lived during the Late Cretaceous. Their first fossil remains were discovered in a limestone quarry at Maast
Halisaurus
…Halisaurus is an extinct genus of mosasaur named by Othniel Charles Marsh in 1869. The holotype, consisting of an angular and a basicranium fragment discovered near Hornerstown, New Jersey…
The ammonite Placenticeras showing punctures caused by the bite of a mosasaur, Natural History Museum of Los Angeles County
A tooth from a mosasaur
Scales of Tylosaurus proriger (KUVP-1075)
Fibrous tissues and microstructures recovered from Prognathodon specimen IRSNB 1624