| Habrosaurus Temporal range:
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| Illustration of Habrosaurus dilatus specimen UALVP 43910 | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Amphibia |
| Order: | Urodela |
| Family: | Sirenidae |
| Genus: | †Habrosaurus Gilmore, 1933 |
| Type species | |
| †Habrosaurus dilatus Gilmore, 1933
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| Other species | |
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| Synonyms | |
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Adelphesiren[1] | |
Habrosaurus (IPA: [hæbroʊsʊrʌs], meaning "graceful lizard") is an extinct genus of prehistoric salamanders, and the oldest known member of the family Sirenidae. Two species are known, H. prodilatus from the middle Campanian Dinosaur Park Formation of Alberta,[1] and H. dilatus from the late Maastrichtian and Paleocene of western North America. It is relatively common in the Lance Formation of Wyoming, and less common in the Hell Creek Formation of Montana.
- ^ a b Gardner, James D. (November 2003). "Revision of Habrosaurus Gilmore (Caudata; Sirenidae) and relationships among sirenid salamanders". Palaeontology. 46 (6): 1089–1122. Bibcode:2003Palgy..46.1089G. doi:10.1046/j.0031-0239.2003.00335.x.