Babibasiliscus alxi Conrad, 2015 |
Abstract
A new fossil showing affinities with extant Laemanctus offers the first clear evidence for a casquehead lizard (Corytophanidae) from the Eocene of North America. Along with Geiseltaliellus from roughly coeval rocks in central Europe, the new find further documents the tropical fauna present during greenhouse conditions in the northern mid-latitudes approximately 50 million years ago (Ma). Modern Corytophanidae is a neotropical clade of iguanian lizards ranging from southern Mexico to northern South America.
Squamata Oppel
Iguania Cuvier
Corytophanidae
Babibasiliscus gen. nov.
urn:lsid:zoobank.org:act:CB390F92-FDDC-4CD8-B6A5-4E4C12836686
Babibasiliscus alxi, gen. et sp. nov.
urn:lsid:zoobank.org:act:F9FB7055-76FE-4BBB-8DD6-7B795B01BB41
Holotype: UWBM 89090; a nearly complete skull with lower jaws and parts of first two cervical vertebrae (Fig 1).
Etymology: Babi- (Shoshoni) meaning “older male cousin” and Basiliscus, a corytophanid lizard. The generic name is meant to honor the Shoshone people who originally inhabited the areas in which the specimen was discovered and to refer to the relationship of the lizard with corytophanid lizards. At the request of Christian A Sidor, the species name honors John P. Alexander, who discovered the holotype.
Locality and Age: Lucky Lizard Locality (UWBM C1046), Uinta County, Wyoming. Blacks Fork Member of Bridger Formation (Bridger B), Green River Basin, late Early Eocene, approximately 48 Ma.
Jack L. Conrad. 2015. A New Eocene Casquehead Lizard (Reptilia, Corytophanidae) from North America. PLoS ONE. DOI: 10.1371/journal.pone.0127900