Eoneustes

Eoneustes; Temporal range: Bajocian - Bathonian, 168.5–167 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	Crocodylomorpha
Suborder:	† Thalattosuchia
Superfamily:	† Metriorhynchoidea
Genus:	† Eoneustes ; Young et al., 2010
Species
	E. bathonicus(Mercier, 1933 [originally Metriorhynchus ]); E. gaudryi(Collot, 1905 [originally Teleidosaurus ]) (type);

Last updated April 26, 2025

Eoneustes (meaning "dawn swimmer") is an extinct genus of metriorhynchoid crocodyliform from Middle Jurassic (late Bajocian to early Bathonian stage) deposits of France. Eoneustes was a carnivore that lived in the oceans and spent much, if not all, its life out at sea.^[1]

Discovery and species

E. bathonicus:^[2] Western Europe (France) of the Middle Jurassic (early Bathonian). It is known from holotype from Calvados of Normandy, that was lost during the Second World War.^[3]
E. gaudryi:^[4] Western Europe (France) of the Middle Jurassic (late Bajocian to early Bathonian). It is known from the holotype NHM R.3353, a partial skull from Côte d’Or, Burgundy and the referred specimen from which housed at Université Claude Bernard Lyon I, F.S.L. 330210, another partial skull from Alpes-de-Haute-Provence, France.^[3]

References

↑ Mark T. Young; Marco Brandalise de Andrade (2009). "What is Geosaurus? Redescription of Geosaurus giganteus (Thalattosuchia: Metriorhynchidae) from the Upper Jurassic of Bayern, Germany". Zoological Journal of the Linnean Society. 157 (3): 551–585. doi: 10.1111/j.1096-3642.2009.00536.x .
↑ Mercier J. 1933. Contribution l’étude des Métriorhynchidés (crocodiliens). Annales de Paléontologie22: 99-119.
1 2 Mark T. Young; Stephen L. Brusatte; Marcello Ruta; Marco Brandalise de Andrade (2010). "The evolution of Metriorhynchoidea (Mesoeucrocodylia, Thalattosuchia): an integrated approach using geometrics morphometrics, analysis of disparity and biomechanics". Zoological Journal of the Linnean Society. 158 (4): 801–859. doi:10.1111/j.1096-3642.2009.00571.x.
↑ Collot L. 1905. Reptile jurassique (Teleidosaurus gaudryi) trouvé à St-Seine-l'Abbaye (Côte-d'Or). Memoire Acad. Sci. Arts et Belles-Lettres10: 41-45.

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[YoungAndrade09-1] Mark T. Young; Marco Brandalise de Andrade (2009). "What is Geosaurus? Redescription of Geosaurus giganteus (Thalattosuchia: Metriorhynchidae) from the Upper Jurassic of Bayern, Germany". Zoological Journal of the Linnean Society. 157 (3): 551–585. doi: 10.1111/j.1096-3642.2009.00536.x .

[Mercier,_1933-2] Mercier J. 1933. Contribution l’étude des Métriorhynchidés (crocodiliens). Annales de Paléontologie22: 99-119.

[Youngetal10-3] 1 2 Mark T. Young; Stephen L. Brusatte; Marcello Ruta; Marco Brandalise de Andrade (2010). "The evolution of Metriorhynchoidea (Mesoeucrocodylia, Thalattosuchia): an integrated approach using geometrics morphometrics, analysis of disparity and biomechanics". Zoological Journal of the Linnean Society. 158 (4): 801–859. doi:10.1111/j.1096-3642.2009.00571.x.

[Collot,_1905-4] Collot L. 1905. Reptile jurassique (Teleidosaurus gaudryi) trouvé à St-Seine-l'Abbaye (Côte-d'Or). Memoire Acad. Sci. Arts et Belles-Lettres10: 41-45.

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