Priscagamidae Temporal range:
Late Cretaceous-
Eocene,
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Scientific classification
![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Iguania |
Family: | †
Priscagamidae Borsuk-Białynicka and Moody, 1984 [1] |
Genera | |
†
Heterodontagama | |
Synonyms | |
Priscagamidae is an extinct family of iguanian lizards [1] known from the Late Cretaceous of Mongolia and China and the Eocene of India, [3] spanning a range from 83.6 to 48.6 million years ago. Probably the earliest priscagamids on indeterminate genera were found in Aptian- Albian sediments in "Hobur", Mongolia. [4] It includes the genera Heterodontagama, Mimeosaurus, Phrynosomimus, Priscagama, and possibly Pleurodontagama. [5] 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. [6] Priscagamidae was originally described as a subfamily of Agamidae called Priscagaminae in 1984, [2] but it was reclassified as a distinct family in 1989. [1] 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 [7]), 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. [8]
Priscagamidae Temporal range:
Late Cretaceous-
Eocene,
| |
---|---|
Scientific classification
![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Squamata |
Suborder: | Iguania |
Family: | †
Priscagamidae Borsuk-Białynicka and Moody, 1984 [1] |
Genera | |
†
Heterodontagama | |
Synonyms | |
Priscagamidae is an extinct family of iguanian lizards [1] known from the Late Cretaceous of Mongolia and China and the Eocene of India, [3] spanning a range from 83.6 to 48.6 million years ago. Probably the earliest priscagamids on indeterminate genera were found in Aptian- Albian sediments in "Hobur", Mongolia. [4] It includes the genera Heterodontagama, Mimeosaurus, Phrynosomimus, Priscagama, and possibly Pleurodontagama. [5] 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. [6] Priscagamidae was originally described as a subfamily of Agamidae called Priscagaminae in 1984, [2] but it was reclassified as a distinct family in 1989. [1] 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 [7]), 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. [8]