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.[1]
^ abEvers, 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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sandownidae, family, extinct, marine, turtles, from, cretaceous, paleogene, distributed, around, atlantic, ocean, adjacent, areas, family, defined, taxa, closer, type, genus, sandownia, than, pelomedusa, testudo, solnhofia, eurysternum, plesiochelys, thalassem. 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 1 SandownidaeTemporal range Barremian Paleocene PreꞒ Ꞓ O S D C P T J K Pg NSkull of Sandownia harrisiScientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass ReptiliaClade PantestudinesClade TestudinataClade PerichelydiaClade AngolacheloniaFamily SandownidaeTong amp Meylan 2013Genera 1 Angolachelys Brachopsemys Leyvachelys SandowniaGenera edit nbsp Angolachelys mbaxiSandownia Meylan et al 2000 Atherfield Clay Formation England Early Cretaceous Aptian Brachyopsemys 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 editAfter Evers and Benson 2018 Testudinata basal stem group turtlesMeiolaniformesParacryptodiraXinjiangchelyidaeSinemydidae MacrobaenidaeTestudines modern turtlesAngolachelonia ThalassochelydiaSandownidae BrachyopsemysLeyvachelysSandowniaReferences edit 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 nbsp This article about a prehistoric turtle is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Sandownidae amp oldid 1103780689, wikipedia, wiki, book, books, library,
