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Casichelydia (disused)
Taxonomy
Casichelydia was named by Gaffney (1975). It is extant.
It was reranked as the unranked clade Casichelydia by Sullivan et al. (1988), Hirayama and Hikida (1998), Gaffney et al. (1998), Previtera and González Riga (2008).
It was assigned to Chelonia by de Broin (1987); to Testudines by Gaffney et al. (1998); to Testudines by Gaffney (1975), Gaffney (1975), Gaffney (1975), Sullivan et al. (1988), Hirayama and Hikida (1998), Gaffney et al. (2006); and to Chelonii by Previtera and González Riga (2008).
It was reranked as the unranked clade Casichelydia by Sullivan et al. (1988), Hirayama and Hikida (1998), Gaffney et al. (1998), Previtera and González Riga (2008).
It was assigned to Chelonia by de Broin (1987); to Testudines by Gaffney et al. (1998); to Testudines by Gaffney (1975), Gaffney (1975), Gaffney (1975), Sullivan et al. (1988), Hirayama and Hikida (1998), Gaffney et al. (2006); and to Chelonii by Previtera and González Riga (2008).
Synonymy list
| Year | Name and author |
|---|---|
| 1975 | Casichelydia Gaffney p. 2 |
| 1987 | Casichelydia de Broin p. 132 |
| 1988 | Casichelydia Sullivan et al. p. 2 |
| 1998 | Casichelydia Gaffney et al. p. 3 |
| 1998 | Casichelydia Hirayama and Hikida p. 70 |
| 2006 | Casichelydia Gaffney et al. p. 26 |
| 2008 | Casichelydia Previtera and González Riga |
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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.
Subor. Casichelydia Gaffney 1975
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. S. Gaffney 1975 | Turtles with closed interpterygoid vacuity and no trace of cultriform process on parasphenoid (parasphenoid nearly always fused with basisphenoid); floor of cavum acustico- jugulare with lateral wall formed by quadrate; kidney-shaped cavum tympani present; all indi- cations of teeth absent; apertura narium externa usually not divided; crista supraoccipitalis ex- panded dorsally and/or posteriorly in comparison with other reptiles; antrum postoticum present; median tubercle on basioccipital absent;lacrimal absent. | |
| E. S. Gaffney 1975 | Skull roof: Temporal emargination better developed than in most Chelonioidea ex- cept Desmatochelys and Corsochelys; parietal, quadratojugal,andsquamosalexposedalongtem- poral margin, parietal-squamosal suture absent. Frontal entering orbital margin. Maxilla and quadratojugal not in contact. Parietals small in contrast to Recent Cheloniidae. Postorbital about intermediate in size between Toxochelys and Recent Cheloniidae. Cheek emargination more extensive than in other Chelonioidea. Jugal relatively small in contrast to living Cheloniidae. Nasals present. Prefrontals meeting in midline. Prefrontal-frontal suture transverse. |