| Suzanniwana | |
|---|---|
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Suborder: | Iguania |
| Clade: | Pleurodonta |
| Genus: | †Suzanniwana Smith,2009 |
| Species | |
†S. patricianaSmith, 2009 (type) | |
Suzanniwana is an extinctgenus ofiguanian lizards that lived in western North America during the earliestEocene, approximately 56 million years ago. Two species are known from theBighorn Basin of Wyoming: thetype speciesS. patriciana named in 2009, and the speciesS. revenanta named in 2013.[1]Suzanniwana lived during thePaleocene–Eocene Thermal Maximum, a brief period ofglobal warming that resulted in warmer and drier conditions in the Bighorn Basin.[2] It likely stemmed from a lineage that had migrated into the basin from regions farther to the south, following a latitudinal band of constant climatic conditions that moved northward as the planet warmed (a phenomenon known ashabitat tracking).[3]Suzanniwana shares many skeletal features with modern casquehead lizards of the familyCorytophanidae and may be astem-corytophanid. It also closely resemblesGeiseltaliellus, an iguanian from the middle EoceneMessel pit in Germany.[3][4]
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