Taxon: ***Stenopterygius longifrons *(Owen, 1881)** - **Ichthyosaur **
**Time period**: [Lower Toarcian, *Harpoceras falciferum* biozone](https://en.wikipedia.org/wiki/Toarcian) (183 million years ago)
**Collection location: **[Dudelange-Galvalange, Luxembourg](https://www.openstreetmap.org/search?query=Dudelange%2C%20Luxembourg#map=14/49.5015/6.1033)
**MnhnL collection number:** TU548
The original specimen of this fossil is kept at the palaeontological collection of the [Luxembourg National Museum of Natural History (MnhnL)](https://www.mnhn.lu/) in Luxembourg.