Kinosternoids are cryptodires, turtles whose necks are able to retract within their shell. Molecular studies suggest they are likely the sister group to the snapping turtles of the family Chelydridae.[2] They are also omnivorous, oviparous, phosphatic, and actively mobile.[3]
^Crawford, Nicholas G.; Parham, James F.; Sellas, Anna B.; Faircloth, Brant C.; Glenn, Travis C.; Papenfuss, Theodore J.; Henderson, James B.; Hansen, Madison H.; Simison, W. Brian (2015). "A phylogenomic analysis of turtles". Molecular Phylogenetics and Evolution. 83: 250–257. doi:10.1016/j.ympev.2014.10.021. ISSN1055-7903. PMID25450099.