Priscagamidae
Priscagamidae |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Iguania |
Family: | †Priscagamidae Alifanov, 1989 |
Genera | |
<templatestyles src="Noitalic/styles.css"/>†Heterodontagama |
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Priscagamidae is an extinct family of iguanian lizards known from the Late Cretaceous of Mongolia and the Eocene of India, spanning a range from 75 to 54 million years ago. It includes the genera Heterodontagama, Mimeosaurus, Phrynosomimus, Priscagama, and possibly Pleurodontagama.[1] The first fossils of priscagamids were found in the Djadochta and Khermeen Tsav formations of Mongolia.[2] More recently they have been found in the Cambay Formation in India, leading to the naming of Heterodontagama in 2013.[3] Priscagamidae was originally described as a subfamily of Agamidae called Priscagaminae in 1984, but it was reclassified as a distinct family in 1989.[4] Most phylogenetic analyses (analyses of evolutionary relationships) still find a close relationship between Priscagamidae and Agamidae (both have been grouped under a clade called Chamaeleontiformes[5]), although a 2015 study found it to be basal to all other iguanian clades, warranting its removal from Iguania and placement in a larger clade called Iguanomorpha.[6]
References
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