Eurhinosaurus
genus of reptiles (fossil)
Eurhinosaurus (Greek for 'well-nosed lizard'; eu- meaning 'well or good', rhino- meaning 'nose' and -saurus meaning 'lizard') is an extinct genus of ichthyosaur from the Early Jurassic (Toarcian), ranging between 183 and 175 million years. Fossils of this genus have been found across Western Europe, such as in England, southern and northern Germany, the Benelux, France and Switzerland.
Eurhinosaurus were large-bodied, with a fossil of an adult individual reaching 7 metres (23 ft) in length. A distinctive feature of the genus is that their upper jaws protruded past their lower jaws (comparable to billfish) and were covered with up and downwards-pointing teeth. They inhabited the open ocean.
History and discovery
The name Ichthyosaurus longirostris was first published by Gideon Mantell in 1851 in a guide to the paleontological galleries of the old British Museum, to name one of the displayed ichthyosaurian specimens. That specimen had an exceedingly slender and elongated muzzle, but the skull was crushed, preserving few characteristics. The specific name, longirostris, was just affixed to the specimen. Since the diagnostic features were so unclear, scientists at that time were not able to name this specimen.
The first skull of Eurhinosaurus longirostris was found by Richard Owen and Jaeger in Switzerland in 1856, which showed clearly shortened mandibles.
Begin with the source’s own compact description: “Eurhinosaurus” is genus of reptiles (fossil). The dossier treats that line as a proposition to test through Eurhinosaurus, genus and reptiles, not as a finished interpretation.
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The phrase “genus of reptiles (fossil)” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Aug 18, 2026. The linked authority identifier is Q1362694. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1851 and 1856.
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This entry incorporates text from “Eurhinosaurus” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.