Seldsienean

Seldsienean; Temporal range: Middle Jurassic, Bathonian PreꞒ Ꞓ O S D C P T J K Pg N ↓
	Holotype skull
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	Crocodylomorpha
Clade:	Crocodyliformes
Suborder:	† Thalattosuchia
Family:	† Machimosauridae
Genus:	† Seldsienean ; Johnson et al., 2020
Species:	†S. megistorhynchus
Binomial name
	†Seldsienean megistorhynchus; (Eudes-Deslongchamps, 1866)
Synonyms
	Steneosaurus megistorhynchusEudes-Deslongchamps, 1866;

Last updated February 23, 2025

Seldsienean (Old English for "seldom seen one") is an extinct genus of machimosaurid thalattosuchian from the Middle Jurassic of England and France.^[1] It is known from the Calcaire de Caen and the Cornbrash Formation.^[1]

Its type species, S. megistorhynchus, was originally described as a species of Steneosaurus in 1866,^[2] but was given its own genus in 2020.^[1]

References

1 2 3 Johnson, Michela M.; Young, Mark T.; Brusatte, Stephen L. (2020). "The phylogenetics of Teleosauroidea (Crocodylomorpha, Thalattosuchia) and implications for their ecology and evolution". PeerJ. 8: e9808. doi: 10.7717/peerj.9808 . ISSN 2167-8359. PMC 7548081 . PMID 33083104.
↑ Eudes-Deslongchamps, J. A. "Sur la découverte d’une mâchoire inférieure entière de Steneosaurus megistorhynchus (GEOFF.) trouvée à Allemagne et comparaison de cette espèce avec le Teleosaurus larteti (DESL.)." Bulletin de la Société linnéenne de Normandie 10 (1866): 80-85.

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[Johnson2020-1] 1 2 3 Johnson, Michela M.; Young, Mark T.; Brusatte, Stephen L. (2020). "The phylogenetics of Teleosauroidea (Crocodylomorpha, Thalattosuchia) and implications for their ecology and evolution". PeerJ. 8: e9808. doi: 10.7717/peerj.9808 . ISSN 2167-8359. PMC 7548081 . PMID 33083104.

[Eudes-Deslongchamps1866-2] Eudes-Deslongchamps, J. A. "Sur la découverte d’une mâchoire inférieure entière de Steneosaurus megistorhynchus (GEOFF.) trouvée à Allemagne et comparaison de cette espèce avec le Teleosaurus larteti (DESL.)." Bulletin de la Société linnéenne de Normandie 10 (1866): 80-85.

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