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Sandownidae

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(Redirected from Sandownid) Extinct family of turtles

Sandownidae
Temporal range: Barremian–Paleocene PreꞒ O S D C P T J K Pg N
Skull of Sandownia harrisi
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Pantestudines
Clade: Testudinata
Clade: Perichelydia
Clade: Thalassochelydia
Family: Sandownidae
Tong & Meylan, 2013
Genera

Sandownidae is a family of extinct marine turtles from the Cretaceous and Paleogene distributed around the Atlantic Ocean and adjacent areas. The family is defined as all taxa closer to the type genus Sandownia 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.

Genera

Angolachelys mbaxi

Phylogeny

After Evers and Benson, 2018:

Testudinata

basal stem-group turtles

Meiolaniformes

Paracryptodira

Xinjiangchelyidae

Sinemydidae/Macrobaenidae

Testudines

modern turtles

Angolachelonia

Thalassochelydia

Sandownidae

Brachyopsemys

Leyvachelys

Sandownia

References

  1. ^ 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. S2CID 134736808.
Pantestudines
Sauropsida
Pantestudines
    • see below↓
Pantestudines
Pantestudines
Testudinata
Australochelyidae
Meiolaniformes
Meiolaniidae
Sichuanchelyidae
Helochelydridae
Compsemydidae
Paracryptodira
Pleurosternidae
Baenidae
Xinjiangchelyidae
Sinemydidae /
Macrobaenidae
Thalassochelydia
(sensu Joyce et al., 2021)
"Eurysternidae"
"Plesiochelyidae"
Sandownidae
Testudines
Pappochelys rosinae Meiolania brevicollis
Taxon identifiers
Sandownidae


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