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Euclastes montenati

Osteichthyes - Testudines - Euclastidae

Discussion

Etymology. Dedicated to Christian Montenat (1941-2020), UniLaSalle-Beauvais Institut, Geosciences (IGAL), for his great geological contribution, world field great knowledge, and particularly his works on the Paris Basin, among which the Danien stratotype definition, including the Laversines site (Montenat & Merle 2018).

urn:lsid:zoobank.org:act:4965B4EC-F146-4D98-9CFF-69C4F1E9F05D

Taxonomy
Euclastes montenati was named by France de Lapparent et al. (2025) [urn:lsid:zoobank.org:act:4965B4EC-F146-4D98-9CFF-69C4F1E9F05D]. Its type specimen is ULB-04A21-11, a mandible, and it is a 3D body fossil. Its type locality is Therdonne, which is in a Thanetian marine sandstone in the Bracheux Formation of France.

Entered
by E. Vlachos on 2025-07-15; modified by E. Vlachos on 2025-07-15

Synonymy list
YearName and author
2025Euclastes montenati France de Lapparent et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
classOsteichthyes
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
RankNameAuthor
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
classReptilia
Testudinata(Oppel 1811)
orderTestudinesBatsch 1788
suborderCryptodira
superfamilyChelonioidea
familyEuclastidae
genusEuclastes
speciesmontenati

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.

Euclastes montenati France de Lapparent et al. 2025
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Diagnosis
ReferenceDiagnosis
d. B. France de Lapparent et al. 2025Small species of the family Euclastidae n. fam. known by its small and massive dentary with a relatively wide and short symphysis for its width. Low dentary branch at the coronoid process. Posterior symphyseal border opening into a very short acute angle at the apex, the angle then opening more widely posteriorly, in a rounded fashion. Particularly large foramen dentofaciale majus (foramen mentale), clearly visible by its large opening in front of the fossa masseterica, posterior to the posterior edge of the symphysis.
Measurements
No measurements are available
Composition: phosphaticsubp
Environment: marinesuperf
Locomotion: actively mobilec
Life habit: aquaticsubo
Diet: omnivoresubo
Reproduction: oviparoussubo
Created: 2017-04-17 10:37:12
Modified: 2017-04-17 10:37:12
Source: superf = superfamily, subo = suborder, c = class, subp = subphylum
References: Kiessling 2004, Bush and Bambach 2015, Uetz 2005, Carroll 1988, Hendy et al. 2009

Age range: Thanetian or 59.24000 to 56.00000 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Thanetian59.24 - 56.0France (Hauts-de-France) Euclastes montenati (type locality: 241483)