Sandownidae
| Sandownidae Temporal range:
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| Skull of Sandownia harrisi | |
Scientific classification 
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| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Pantestudines |
| Clade: | Perichelydia |
| Clade: | †Angolachelonia |
| Family: | †Sandownidae Tong & Meylan, 2013 |
| Genera[1] | |
Sandownidae is a family of extinct marine turtles from the Cretaceous and Paleogene. The family is defined as all taxa closer to the type genus than to Pelomedusa, Testudo, Solnhofia, Eurysternum, Plesiochelys, Thalassemys or Protostega, a definition that encompasses the previous concept of the clade while also excluding it from being synonymous with other clades of modern or extinct marine turtles. Sandownidae may be within the larger clade Angolachelonia, defined as inclusive of Angolachelys and Solnhofia, sister to the entirely Late Jurassic marine group Thalassochelydia, although the concepts of the clades may shift with further phylogenetic analysis.[1]
Genera[]
- Meylan et al. 2000 Atherfield Clay Formation, England, Early Cretaceous (Aptian)
- Tong and Meylan 2013 Ouled Abdoun Basin, Morocco, Paleocene (Danian)
- Angolachelys Mateus et al. 2009 Itombe Formation, Angola, Late Cretaceous (Coniacian)
- Leyvachelys Cadena 2015 Paja Formation, Colombia, Early Cretaceous (Barremian) Glen Rose Formation, Texas, Early Cretaceous, (Albian)
Phylogeny[]
After Evers and Benson, 2018:
| Testudinata |
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References[]
- ^ a b Evers, S.W.; Benson, R.B.J. (2018). "A new phylogenetic hypothesis of turtles with implications for the timing and number of evolutionary transitions to marine lifestyles in the group". Palaeontology. 62 (2): 93–134. doi:10.1111/pala.12384.
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- Cretaceous turtles
- Paleogene turtles
- Cryptodira
- Turtle families
- Prehistoric reptile families
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