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Craspedochelys jaccardi

Reptilia - Testudines - Plesiochelyidae

Taxonomy
Emys jaccardi was named by Pictet (1860). Its type specimen is Geolog. Inst. der Universitat Neuchatel and is a 3D body fossil. Its type locality is 15 km north of Neuchâtel, route de La Chauds-de-Fonds, which is in a Tithonian marine horizon in the Virgulien superieur Formation of Switzerland.

It was recombined as Plesiochelys jaccardi by Rütimeyer (1873) and Bräm (1965); it was synonymized subjectively with Plesiochelys etalloni by Gaffney (1975); it was recombined as Craspedochelys jaccardi by Antunes et al. (1988), Lapparent de Broin et al. (1996), Anquetin et al. (2014) and Anquetin et al. (2017).

Synonyms
Synonymy list
YearName and author
1860Emys jaccardi Pictet p. 15
1873Plesiochelys jaccardi Rütimeyer p. 68
1898Plesiochelys choffati Sauvage p. 24
1965Plesiochelys jaccardi Bräm p. 69
1988Craspedochelys jaccardi Antunes et al. p. 145
1996Craspedochelys jaccardi Lapparent de Broin et al. p. 562
2014Craspedochelys jaccardi Anquetin et al.
2017Craspedochelys jaccardi Anquetin et al.

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
RankNameAuthor
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
Thalassochelydia
familyPlesiochelyidaeRütimeyer 1873
genusCraspedochelys
speciesjaccardi(Pictet 1860)

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
ReferenceDiagnosis
J. Anquetin et al. 2017Craspedochelys jaccardi differs from all other Craspedochelys by having a more rounded carapace with its greatest width at the level of peripheral VII, a higher length/width ratio of the costal bones (4.8 or more, as opposed to around 4.3 for costal IV). In addition, Craspedochelys jaccardi differs from Craspedochelys picteti by being smaller in size (carapace length 420 mm) and by having an evenly rounded anterior carapacial rim, a contact between costal VIII and peripheral XI present, a wider than long pygal bone, and wider than long hyoplastra and differs from Craspedochelys passmorei by having a shallower nuchal notch, epiplastra that reach the lateral margin of the anterior plastral lobe, and a shorter posterior plastral lobe.