Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Thalassochelydia

Reptilia - Testudines

Discussion

The name Thalassochelydia is here referred to the clade that includes all turtles more closely related to Eurysternum wagleri Meyer, 1839c, Plesiochelys etalloni (Pictet and Humbert, 1857), and Thalassemys hugii Rütimeyer, 1873a, than to Pelomedusa subrufa (Bonnaterre, 1789), Testudo graeca Linnaeus, 1758, or Protostega gigas (Cope, 1871). Eucryptodiran turtles from the Late Jurassic of Europe were traditionally classified in several families, in particular Eurysternidae, Plesiochelyidae, and Thalassemydidae, but we are unaware of any higher level name having been pro- posed to unite all into a group. We here recognize that some information is available that hints at the monophyly of these turtles and we therefore here propose a new name for that group, Thalassochelydia, in allusion to their predominantly marine habitat preferences. Increased taxon sampling and the development of new cranial characters recently allowed this group to be supported in a phylogenetic context (Anquetin et al. 2015). In order to avoid potential conflict with the phylogenetic definition of Protostegidae Cope, 1872, as recently proposed by Cadena and Parham (2015), our definition of Thalassochelydia specifically excludes the species Protostega gigas (Cope, 1871).

Synonyms
Synonymy list
YearName and author
1856Acichelys approximata Wagner p. 23
1861Euryaspis radians Wagner p. 89 figs. plate 2
1861Euryaspis approximata Wagner p. 92
1880Tropidemys morinica Sauvage pp. 536-537 figs. Pl. XX:1-3
1924Plesiochelys oblonga Oertel
1924Plesiochelys pumilio Oertel
1924Thalassemys heusseri Oertel
2017Thalassochelydia Anquetin et al.

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
RankNameAuthor
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
Thalassochelydia
Thalassochelydia

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.

Diagnosis
No diagnoses are available