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Meiolaniformes
Discussion
Meiolaniformes is the stem-based definition of Meiolaniidae. Meiolaniformes refers to all the taxa more related to Meiolania platyceps than to Cryptodira or Pleurodira
Taxonomy
Meiolaniformes was named by Sterli and de la Fuente (2013). It was considered monophyletic by Sterli (2015).
It was assigned to Testudines by Rhodin et al. (2015); to Testudinata by Sterli and de la Fuente (2013), Perea et al. (2014), Gasparini et al. (2015), Sterli (2015), Sterli et al. (2015) and Sterli et al. (2015); and to Perichelydia by Joyce (2017) and Sterli and de la Fuente (2019).
It was assigned to Testudines by Rhodin et al. (2015); to Testudinata by Sterli and de la Fuente (2013), Perea et al. (2014), Gasparini et al. (2015), Sterli (2015), Sterli et al. (2015) and Sterli et al. (2015); and to Perichelydia by Joyce (2017) and Sterli and de la Fuente (2019).
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Meiolaniformes Sterli and de la Fuente |
| 2014 | Meiolaniformes Perea et al. |
| 2015 | Meiolaniformes Gasparini et al. |
| 2015 | Meiolaniformes Rhodin et al. |
| 2015 | Meiolaniformes Sterli |
| 2015 | Meiolaniformes Sterli et al. |
| 2017 | Meiolaniformes Joyce |
| 2019 | Meiolaniformes Sterli and de la Fuente |
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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.
Unr. †Meiolaniformes Sterli and de la Fuente 2013
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Fm. †Meiolaniidae Lydekker 1887
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G. †Meiolania Owen 1886
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†Meiolania brevicollis Megirian 1992
†Meiolania mackayi Anderson 1925
†Meiolania platyceps Owen 1886
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Invalid names: Ceratochelys sthenurus Huxley 1887 [objective synonym], Ceratochelys sthenurus Huxley 1887 [objective synonym], Meiolania minor Owen 1886 [synonym], Meiolania minor Owen 1886 [synonym]
Invalid names: Miolaniidae [synonym]
G. †Patagoniaemys Sterli and de la Fuente 2011
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†Patagoniaemys gasparinae Sterli and de la Fuente 2011
G. †Peligrochelys Sterli and de la Fuente 2013
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†Peligrochelys walshae Sterli and de la Fuente 2013
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| 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. |