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Planetochelyidae (disused)
Taxonomy
Planetochelyidae was named by Hutchison (2013). Its type is Planetochelys.
It was assigned to Trionychoidea by Hutchison (2013).
It was assigned to Trionychoidea by Hutchison (2013).
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Planetochelyidae Hutchison |
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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.
Fm. †Planetochelyidae Hutchison 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. H. Hutchison 2013 | Differs from other trionychoids in the
following combination of features: moderate size plastron divided by a transverse hinge joint formed along the hyohypoplastral suture (entoplastronmay also contribute); plastral lobes ligamentally attached to carapace and marked by a low rugose longitudinal ridges on the bridge portions; plastral articular areas on the bridge peripherals (P4-7) truncated and nearly smooth; nuchalwith a pair of strong costiformprocesses that span P1 and insert into P2 viscerally; some distal rib ends hooked; rib ends of C1-5 cross the sutures of two peripherals medially; extragulars may be present; entoplastron distinctly longer than wide; and no plastral caudal notch. |