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Sandownidae
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<h2 id="genera">Genera</h2> <ul><li><i>Sandownia</i> Meylan et al. 2000 <a href="/facts/Atherfield_Clay_Formation/SgKqNJ9j">Atherfield Clay Formation</a>, England, Early Cretaceous (<a href="/facts/Aptian/nXFfjnyR">Aptian</a>)</li> <li><i>Brachyopsemys</i> Tong and Meylan 2013 <a href="/facts/Ouled_Abdoun_Basin/GBMswvqW">Ouled Abdoun Basin</a>, Morocco, <a href="/facts/Paleocene/IWWoh8D9">Paleocene</a> (<a href="/facts/Danian/7kD8PDUv">Danian</a>)</li> <li><i><a href="/facts/Angolachelys/HneSLdh9">Angolachelys</a></i> Mateus et al. 2009 <a href="/facts/Itombe_Formation/aRsk2P2I">Itombe Formation</a>, Angola, Late Cretaceous (<a href="/facts/Coniacian/qgdmvQJP">Coniacian</a>)</li> <li><i><a href="/facts/Leyvachelys/rA65PSjD">Leyvachelys</a></i> Cadena 2015 <a href="/facts/Paja_Formation/77BuI6fQ">Paja Formation</a>, Colombia, Early Cretaceous (<a href="/facts/Barremian/sQMx5M6L">Barremian</a>) <a href="/facts/Glen_Rose_Formation/0hAQpuSW">Glen Rose Formation</a>, Texas, Early Cretaceous, (<a href="/facts/Albian/faHcmHDC">Albian</a>)</li></ul> <h2 id="phylogeny">Phylogeny</h2> <p>After Evers and Benson, 2018: </p> <table><tbody><tr><td><a href="/facts/Testudinata/R7d1PlXs">Testudinata</a></td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p>basal stem-group turtles</p></td></tr><tr><td></td></tr><tr><td></td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p><a href="/facts/Meiolaniformes/GCMIGNFf">Meiolaniformes</a></p></td></tr><tr><td></td></tr><tr><td></td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p><a href="/facts/Paracryptodira/WI90l0lv">Paracryptodira</a></p></td></tr><tr><td></td></tr><tr><td></td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p><a href="/facts/Xinjiangchelyidae/16nM8Y8v">Xinjiangchelyidae</a></p></td></tr><tr><td></td></tr><tr><td></td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p><a href="/facts/Sinemydidae/weuQ8Ba3">Sinemydidae</a>/<a href="/facts/Macrobaenidae/Qdkp3sQE">Macrobaenidae</a></p></td></tr><tr><td></td></tr><tr><td></td><td rowspan="2"><table><tbody><tr><td><a href="/facts/Testudines/X0ImnxYt">Testudines</a></td><td rowspan="2"><p>modern turtles</p></td></tr><tr><td></td></tr><tr><td><a href="/facts/Angolachelonia/Pyct5eIJ">Angolachelonia</a></td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p><a href="/facts/Thalassochelydia/yPSfEkdl">Thalassochelydia</a></p></td></tr><tr><td></td></tr><tr><td>Sandownidae</td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p><i>Brachyopsemys</i></p></td></tr><tr><td></td></tr><tr><td></td><td rowspan="2"><table><tbody><tr><td></td><td rowspan="2"><p><i><a href="/facts/Leyvachelys/rA65PSjD">Leyvachelys</a></i></p></td></tr><tr><td></td></tr><tr><td></td><td rowspan="2"><p><i>Sandownia</i></p></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>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. <a href="https://ora.ox.ac.uk/objects/uuid:33a26ae9-a5f6-43b5-ace1-2d17b1dadeb6" target="_blank">https://ora.ox.ac.uk/objects/uuid:33a26ae9-a5f6-43b5-ace1-2d17b1dadeb6</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>