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Steneosaurus

January 01, 1970

Steneosaurus (from Greek: στενός stenós, 'narrow' and Greek: σαῦρος saûros, 'lizard')[1] is a dubious genus of teleosaurid crocodyliform from the Middle or Late Jurassic (Callovian or early Oxfordian) of France. The genus has been used as a wastebasket taxon for thalattosuchian fossils for over two centuries, and almost all known historical species of teleosauroid have been included within it at one point. The genus has remained a wastebasket, with numerous species still included under the label ‘Steneosaurus’, many of which are unrelated to each other (either paraphyletic or polyphyletic with respect to each other and other genera of teleosauroids).

Steneosaurus
Temporal range: Middle or Late Jurassic
~Callovian or Lower Oxfordian
Lectotype snout
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Clade: Archosauria
Clade: Pseudosuchia
Clade: Crocodylomorpha
Clade: Crocodyliformes
Suborder: †Thalattosuchia
Superfamily: †Teleosauroidea
Genus: †Steneosaurus
Geoffroy, 1825
Type species
†Steneosaurus rostromajor
Geoffroy, 1825
Synonyms
Synonyms of Steneosaurus
  • Leptocranius Bronn, 1837
Synonyms of S. rostromajor:
  • Gavialis bacheleti
  • Steneosaurus longirostris

Discovery and assigned species edit

 
Front part of the lectotype snout as figured by Georges Cuvier in 1808

The type species, S. rostromajor, was only formally recognised as such in 2020, and this revision determined the type specimen of Steneosaurus was undiagnostic, and so declared the genus Steneosaurus a nomen dubium.[2] The history of this specimen has been detailed in 2017.[3] It was discovered in three pieces by abbot Charles Bacheley (1716-1795) in the Vaches Noires near Villers-sur-Mer (Calvados, France).[4] Bacheley offered these pieces to Alexandre Besson (1725-1809) who had built up an important cabinet of fossils and minerals in Paris. Besson gave one of the pieces (the posterior portion) to Barthélémy Faujas de Saint-Fond (1741-1819), professor of geology in the Muséum national d'Histoire naturelle, Paris. Georges Cuvier first illustrated in 1808 the two anterior pieces of the specimen kept in the Besson collection and then figured the third piece (posterior portion from the Faujas de Saint-Fond collection) in 1824 in association with the anterior pieces (Besson collection) and other cranial remains belonging to Metriorhynchidae.

The remaining species referred to Steneosaurus thus require new generic names, and some species have already been assigned to new genera prior to Steneosaurus being declared a nomen dubium.[2]

Species in this genus are traditionally classed into two skull groups: longirostrine (long, narrow jaws) and mesorostrine (slightly shorter jaws).

Longirostrine
  • 'S.' atelestatus Eudes-Deslongchamps, 1868[5] - Oxfordian Marnes de Villers of France
  • 'S.' blumembachi Eudes-Deslongchamps, 1868[6] - Oxfordian Marnes de Villers of France
  • 'S.' oplites Eudes-Deslongchamps, 1863[7] - Toarcian La Caine-Curcy of France
  • 'S.' rudis Sauvage, 1874[8] - France

Reassigned species edit

Classification edit

A 2005 phylogenetic analysis into the evolutionary relationships of Thalattosuchia did not support the monophyly of Steneosaurus, as the genera Machimosaurus and Teleosaurus both fell within Steneosaurus.[13] Reinforcing the paraphyly of Steneosaurus, the Callovian species "Steneosaurus" obtusidens has been recovered as the sister species of Machimosaurus in recent cladistic analyses of Thalattosuchia and renamed Lemmysuchus, while 'Steneosaurus' bollensis was recovered in a basal position to other members of Steneosaurus sensu lato.[14][15]

See also edit

References edit

  1. ^ Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 162. Retrieved 1 January 2022.
  2. ^ a b Johnson, Michela M.; Young, Mark T.; Brusatte, Stephen L. (2020). "Emptying the wastebasket: a historical and taxonomic revision of the Jurassic crocodylomorph Steneosaurus". Zoological Journal of the Linnean Society. 189 (2): 428–448. doi:10.1093/zoolinnean/zlaa027. hdl:20.500.11820/9abd0c02-12ee-4387-ad0d-ceaff5ebdbe3.
  3. ^ Brignon, A. (2017). "Les " ossements pétrifiés " du Jurassique des Vaches Noires dans les cabinets d'histoire naturelle du XVIIIe et du début du XIXe siècles". L'Echo des Falaises, revue de l'Association paléontologique de Villers-sur-Mer (21): 7–35.
  4. ^ Brignon, A. (2016). "L'abbé Bacheley et la découverte des premiers dinosaures et crocodiliens marins dans le Jurassique des Vaches Noires (Callovien/Oxfordien, Normandie)". Comptes Rendus Palevol. 15 (5): 595–605. Bibcode:2016CRPal..15..595B. doi:10.1016/j.crpv.2015.10.004.
  5. ^ Steneosaurus atelestatus at Fossilworks.org
  6. ^ Steneosaurus blumembachi at Fossilworks.org
  7. ^ Steneosaurus oplites at Fossilworks.org
  8. ^ Steneosaurus rudis at Fossilworks.org
  9. ^ a b Johnson, Michela M.; Young, Mark T.; Brusatte, Stephen L. (2019). "Re-description of two contemporaneous mesorostrine teleosauroids (Crocodylomorpha: Thalattosuchia) from the Bathonian of England and insights into the early evolution of Machimosaurini". Zoological Journal of the Linnean Society. 189 (2): 449–482. doi:10.1093/zoolinnean/zlz037. hdl:1842/36656.
  10. ^ Foffa, Davide; Young, Mark T.; Brusatte, Stephen L. (2018). "Filling the Corallian gap: New information on Late Jurassic marine reptile faunas from England" (PDF). Acta Palaeontologica Polonica. 63: 287–313. doi:10.4202/app.00455.2018. Retrieved 7 March 2019.
  11. ^ Foffa, D.; Young, M.T.; Brusatte, S.L.; Steel, L. (2015). "New specimen and revision of the late Jurassic teleosaurid 'Steneosaurus' megarhinus". PeerJ Preprints. 3: e1351v1. Retrieved 7 March 2019.
  12. ^ Foffa, D.; Johnson, M.M.; Young, M.T.; Steel, L.; Brusatte, S.L. (2019). "Revision of the Late Jurassic deep-water teleosauroid crocodylomorph Teleosaurus megarhinus Hulke, 1871 and evidence of pelagic adaptations in Teleosauroidea". PeerJ. 7: e6646. doi:10.7717/peerj.6646. PMC 6450380. PMID 30972249.
  13. ^ Mueller-Töwe, I. J. (2005). "Phylogenetic relationships of the Thalattosuchia" (PDF). Zitteliana. A45: 211–213.
  14. ^ Young, M. T.; Brusatte, S. L.; Andrade, M. B.; Desojo, J. B.; Beatty, B. L.; Steel, L.; Fernández, M. S.; Sakamoto, M.; Ruiz-Omeñaca, J. I.; Schoch, R. R. (2012). ""Butler, Richard J, ed. "The Cranial Osteology and Feeding Ecology of the Metriorhynchid Crocodylomorph Genera Dakosaurus and Plesiosuchus from the Late Jurassic of Europe". PLOS ONE. 7 (9): e44985. doi:10.1371/journal.pone.0044985. PMC 3445579. PMID 23028723.
  15. ^ Martin, J. E.; Vincent, P. (2013). "New remains of Machimosaurus hugii von Meyer, 1837 (Crocodilia, Thalattosuchia) from the Kimmeridgian of Germany". Fossil Record. 16 (2): 179–196. doi:10.1002/mmng.201300009.

External links edit

 
Wikimedia Commons has media related to Steneosaurus.
  • Angellis Net pdf

January 01, 1970
steneosaurus, from, greek, στενός, stenós, narrow, greek, σαῦρος, saûros, lizard, dubious, genus, teleosaurid, crocodyliform, from, middle, late, jurassic, callovian, early, oxfordian, france, genus, been, used, wastebasket, taxon, thalattosuchian, fossils, ov. Steneosaurus from Greek stenos stenos narrow and Greek saῦros sauros lizard 1 is a dubious genus of teleosaurid crocodyliform from the Middle or Late Jurassic Callovian or early Oxfordian of France The genus has been used as a wastebasket taxon for thalattosuchian fossils for over two centuries and almost all known historical species of teleosauroid have been included within it at one point The genus has remained a wastebasket with numerous species still included under the label Steneosaurus many of which are unrelated to each other either paraphyletic or polyphyletic with respect to each other and other genera of teleosauroids SteneosaurusTemporal range Middle or Late Jurassic Callovian or Lower Oxfordian PreꞒ Ꞓ O S D C P T J K Pg N Lectotype snout Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Reptilia Clade Archosauria Clade Pseudosuchia Clade Crocodylomorpha Clade Crocodyliformes Suborder Thalattosuchia Superfamily Teleosauroidea Genus SteneosaurusGeoffroy 1825 Type species Steneosaurus rostromajorGeoffroy 1825 Synonyms Synonyms of Steneosaurus Leptocranius Bronn 1837 Synonyms of S rostromajor Gavialis bacheletiSteneosaurus longirostris Contents 1 Discovery and assigned species 1 1 Reassigned species 2 Classification 3 See also 4 References 5 External linksDiscovery and assigned species edit nbsp Front part of the lectotype snout as figured by Georges Cuvier in 1808 The type species S rostromajor was only formally recognised as such in 2020 and this revision determined the type specimen of Steneosaurus was undiagnostic and so declared the genus Steneosaurus a nomen dubium 2 The history of this specimen has been detailed in 2017 3 It was discovered in three pieces by abbot Charles Bacheley 1716 1795 in the Vaches Noires near Villers sur Mer Calvados France 4 Bacheley offered these pieces to Alexandre Besson 1725 1809 who had built up an important cabinet of fossils and minerals in Paris Besson gave one of the pieces the posterior portion to Barthelemy Faujas de Saint Fond 1741 1819 professor of geology in the Museum national d Histoire naturelle Paris Georges Cuvier first illustrated in 1808 the two anterior pieces of the specimen kept in the Besson collection and then figured the third piece posterior portion from the Faujas de Saint Fond collection in 1824 in association with the anterior pieces Besson collection and other cranial remains belonging to Metriorhynchidae The remaining species referred to Steneosaurus thus require new generic names and some species have already been assigned to new genera prior to Steneosaurus being declared a nomen dubium 2 Species in this genus are traditionally classed into two skull groups longirostrine long narrow jaws and mesorostrine slightly shorter jaws Longirostrine S atelestatus Eudes Deslongchamps 1868 5 Oxfordian Marnes de Villers of France S blumembachi Eudes Deslongchamps 1868 6 Oxfordian Marnes de Villers of France S oplites Eudes Deslongchamps 1863 7 Toarcian La Caine Curcy of France S rudis Sauvage 1874 8 France Reassigned species edit Steneosaurus baroni Newton 1893 Andrianavoay Steneosaurus bollensis Von Meyer 1830 Macrospondylus S bouchardi Sauvage 1872 Proexochokefalos Steneosaurus boutilieri Eudes Deslongchamps 1869 Yvridiosuchus 9 Steneosaurus brevior Blake 1876 Mystriosaurus Steneosaurus deslongchampsianus Lennier 1887 10 Steneosaurus edwardsi Eudes Deslongchamps 1868 Neosteneosaurus Steneosaurus gracilirostris Westphal 1961 Plagiophthalmosuchus Steneosaurus heberti Morel de Glasville 1876 Proexochokefalos Steneosaurus larteti Eudes Deslongchamps 1868 Deslongchampsina 9 Steneosaurus leedsi Andrews 1909 Charitomenosuchus Steneosaurus megarhinus Hulke 1871 Bathysuchus 11 12 Steneosaurus megistorhynchus Geoffrey Saint Hilaire in Eudes Deslongchamps 1869 Seldsienean Steneosaurus obtusidens Andrews 1909 LemmysuchusClassification editA 2005 phylogenetic analysis into the evolutionary relationships of Thalattosuchia did not support the monophyly of Steneosaurus as the genera Machimosaurus and Teleosaurus both fell within Steneosaurus 13 Reinforcing the paraphyly of Steneosaurus the Callovian species Steneosaurus obtusidens has been recovered as the sister species of Machimosaurus in recent cladistic analyses of Thalattosuchia and renamed Lemmysuchus while Steneosaurus bollensis was recovered in a basal position to other members of Steneosaurus sensu lato 14 15 See also edit nbsp Paleontology portal List of marine reptilesReferences edit Roberts George 1839 An etymological and explanatory dictionary of the terms and language of geology London Longman Orme Brown Green amp Longmans p 162 Retrieved 1 January 2022 a b Johnson Michela M Young Mark T Brusatte Stephen L 2020 Emptying the wastebasket a historical and taxonomic revision of the Jurassic crocodylomorph Steneosaurus Zoological Journal of the Linnean Society 189 2 428 448 doi 10 1093 zoolinnean zlaa027 hdl 20 500 11820 9abd0c02 12ee 4387 ad0d ceaff5ebdbe3 Brignon A 2017 Les ossements petrifies du Jurassique des Vaches Noires dans les cabinets d histoire naturelle du XVIIIe et du debut du XIXe siecles L Echo des Falaises revue de l Association paleontologique de Villers sur Mer 21 7 35 Brignon A 2016 L abbe Bacheley et la decouverte des premiers dinosaures et crocodiliens marins dans le Jurassique des Vaches Noires Callovien Oxfordien Normandie Comptes Rendus Palevol 15 5 595 605 Bibcode 2016CRPal 15 595B doi 10 1016 j crpv 2015 10 004 Steneosaurus atelestatus at Fossilworks org Steneosaurus blumembachi at Fossilworks org Steneosaurus oplites at Fossilworks org Steneosaurus rudis at Fossilworks org a b Johnson Michela M Young Mark T Brusatte Stephen L 2019 Re description of two contemporaneous mesorostrine teleosauroids Crocodylomorpha Thalattosuchia from the Bathonian of England and insights into the early evolution of Machimosaurini Zoological Journal of the Linnean Society 189 2 449 482 doi 10 1093 zoolinnean zlz037 hdl 1842 36656 Foffa Davide Young Mark T Brusatte Stephen L 2018 Filling the Corallian gap New information on Late Jurassic marine reptile faunas from England PDF Acta Palaeontologica Polonica 63 287 313 doi 10 4202 app 00455 2018 Retrieved 7 March 2019 Foffa D Young M T Brusatte S L Steel L 2015 New specimen and revision of the late Jurassic teleosaurid Steneosaurus megarhinus PeerJ Preprints 3 e1351v1 Retrieved 7 March 2019 Foffa D Johnson M M Young M T Steel L Brusatte S L 2019 Revision of the Late Jurassic deep water teleosauroid crocodylomorph Teleosaurus megarhinus Hulke 1871 and evidence of pelagic adaptations in Teleosauroidea PeerJ 7 e6646 doi 10 7717 peerj 6646 PMC 6450380 PMID 30972249 Mueller Towe I J 2005 Phylogenetic relationships of the Thalattosuchia PDF Zitteliana A45 211 213 Young M T Brusatte S L Andrade M B Desojo J B Beatty B L Steel L Fernandez M S Sakamoto M Ruiz Omenaca J I Schoch R R 2012 Butler Richard J ed The Cranial Osteology and Feeding Ecology of the Metriorhynchid Crocodylomorph Genera Dakosaurus and Plesiosuchus from the Late Jurassic of Europe PLOS ONE 7 9 e44985 doi 10 1371 journal pone 0044985 PMC 3445579 PMID 23028723 Martin J E Vincent P 2013 New remains of Machimosaurus hugii von Meyer 1837 Crocodilia Thalattosuchia from the Kimmeridgian of Germany Fossil Record 16 2 179 196 doi 10 1002 mmng 201300009 External links edit nbsp Wikimedia Commons has media related to Steneosaurus Angellis Net pdf Retrieved from https en wikipedia org w index php title Steneosaurus amp oldid 1193724854, wikipedia, wiki, book, books, library,

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