|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Meiolaniformes is the stem-based definition of Meiolaniidae. Meiolaniformes refers to all the taxa more related to Meiolania platyceps than to Cryptodira or Pleurodira
It was assigned to Testudines by Rhodin et al. (2015); to Testudinata by Sterli and de la Fuente (2013), Perea et al. (2014), Sterli (2015), Sterli et al. (2015) and Sterli et al. (2015); and to Perichelydia by Joyce (2017) and Sterli and de la Fuente (2019).
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|J. Sterli 2015||Representatives of Meiolaniformes are currently diagnosed relative to other turtles by the presence of a large prefrontal exposure, a lack of a frontal contribution to the orbit, the presence of a ventral crest on the vomer, a crista supraoccipitalis that extends posteriorly well beyond the foramen magnum, formed cervical vertebrae, opisthocoelous vertebrae in the anterior part of the tail, randomly distributed small pits on the surface of the dermal bones of the skull and shell and anteriorly inflected marginal scute sulci along the carapacial margin|
|J. Sterli and M. S. de la Fuente 2019||It differs from the basal members of Testudinata (taxa outside Perichelydia clade) by the reduction of the processus interfenestralis of the opisthotic, absence of the processus basitrabecularis, and an enclosed canalis cavernosus.|