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Re: [dinosaur] Temnodontosaurus trigonodon formations query




Ben Creisler
bcreisler@gmail.com

The situation with the French Temnodontosaurus trigonodon appears to be a bit complicated. The following article in French (with a free pdf online) outlines the discovery at a cement quarry in Sainte-Colombe of what became the holotype of Ichthyosaurus burgundiae (including a nearly complete skull), later made Temnodontosaurus burgundiae by Lydekker. Maisch (1998) decided T. burgundiae was a synonym of the German Temnodontosaurus trigonodon. However, the French article notes that this identification was based only a study of the German specimens, and not on an actual examination and comparison of the French specimen. Unfortunately, the holotype skull specimen in the National Museum of Natural History in Paris is reportedly in a poor state of conservation because of pyrite disease and no in-depth study has been undertaken (or may be possible) to confirm the hypothesis. There are illustrations and old photos of the holotype skull.Â

Arnaud BRIGNON (2018)
Lâindustrie du ciment de Vassy et son rÃle dans les dÃcouvertes des vertÃbrÃs toarciens de lâAvallonnais.
[The cement industry at Vassy and its role in the discovery of the Toarcian vertebrates of the AvallonnaisÂregion]
Fossiles 34: 21-50

https://www.researchgate.net/publication/325385593_L%27industrie_du_ciment_de_Vassy_et_son_role_dans_les_decouvertes_des_vertebres_toarciens_de_l%27Avallonnais

So far, I have not been able to find reference to the official name of the geological formation where the fossils were found.




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On Wed, Aug 19, 2020 at 6:51 PM John Schneiderman <john-schneiderman@cox.net> wrote:

ICHTHYOSAURIA of FRANCE

Although not specifically Temnodontosaurus trigonodon / most Ichthyosaurs found in France have been associated with or at times made junior synonyms of T. trigonodon / with the exceptions of specimens 5,6,7 & 9 which are associated with Platypterygius.

I couldn't find a formation named for Lafarge quarry, but this article has a wealth of information about it and the ichthyosaur and associated vertebrates found there:

https://www.researchgate.net/publication/237076535

VINCENT, MARTIN, FISCHER, GUILLAUME SUAN, KHALLOUFI, SUCHÃRAS-MARX, LÃNA, JANNEAU, ROUSSELLE & RULLEAU, 2013. "Marine vertebrate remains from the Toarcian-Aalenian succession of Southern Beaujolais, RhÃne, France" ÂGeological Magazine  Sept 2013

DOI: 10.1017/S0016756812000982

  • [ 1 ] Ichthyosauria -Temnodontosaurus azerguensis sp. Martin et al. 2012

Belmont dâAzergues (Lafarge quarry), Middle Toarcian (bifrons/variabilis) (Jurassic of France)

Where: Rhone, France (45.9Â N, 4.7Â E: paleocoordinates 34.6Â N, 15.5Â E)

When: Hildoceras bifrons and Haugia variabilis ammonoid zone, Middle Toarcian (182.0 - 175.6 Ma)

Environment/lithology: marine; bioturbated, phosphatic marl and ooidal limestone

  • Collections in 1984 by M. Dejob and Ms. Laurent
  • Musee des Amis de la Mine in Saint-Pierre La Palud, Rhone department, France (MAMSPLP).

Note: T. azerguensis had a similar size and postcranial anatomy to other Temnodontosaurus species, however its cranial morphology differed. The rostrum was more elongate and thin and had a reduced quadrate. Since T. azerguensis either had very small teeth or no teeth at all, it has been proposed that it was probably not effective at eating hard shelled or bony prey, and instead had a diet of smaller and softer prey compared to the other Temnodontosaurus species. T. azerguensis is younger than other ichthyosaurs, originating from the bifrons ammiote zone of the middle Toarcian.

Primary reference: P. Vincent, J. E. Martin, V. Fischer, G. Suan, B. Khalloufi, B. SuchÃras-Marx, A. LÃna, K. Janneau, B. Rouselle and L. Rulleau. 2013. Marine vertebrate remains from the ToarcianâAalenian succession of southern Beaujolais, RhÃne, France. Geological Magazine

  • [ 2 ] Ichthyosauria - Ichthyosauria indet.

Belmont dâAzergues (Lafarge quarry), Lower Aalenian (opalinum Zone) (Jurassic of France)

Where: Rhone, France (45.9Â N, 4.7Â E: paleocoordinates 35.0Â N, 15.3Â E)

When: Leioceras opalinum ammonoid zone, Early/Lower Aalenian (175.6 - 171.6 Ma)

Environment/lithology: marine; shelly/skeletal, yellow, sandy limestone and red, yellow, calcareous sandstone

  • Musee des Amis de la Mine in Saint-Pierre La Palud, Rhone department, France (MAMSPLP).

Primary reference: P. Vincent, J. E. Martin, V. Fischer, G. Suan, B. Khalloufi, B. SuchÃras-Marx, A. LÃna, K. Janneau, B. Rouselle and L. Rulleau. 2013. Marine vertebrate remains from the ToarcianâAalenian succession of southern Beaujolais, RhÃne, France. Geological Magazine

  • [ 3 ] Ichthyosauria -? Temnodontosaurus sp.

Belmont dâAzergues (Lafarge quarry), Upper Toarcian (Jurassic of France)

Where: Rhone, France (45.9Â N, 4.7Â E: paleocoordinates 34.6Â N, 15.5Â E)

When: Late/Upper Toarcian (180.1 - 175.6 Ma)

Environment/lithology: marine; bioturbated, gray, green, red marl

  • Musee des Amis de la Mine in Saint-Pierre La Palud, Rhone department, France (MAMSPLP).

Primary reference: P. Vincent, J. E. Martin, V. Fischer, G. Suan, B. Khalloufi, B. SuchÃras-Marx, A. LÃna, K. Janneau, B. Rouselle and L. Rulleau. 2013. Marine vertebrate remains from the ToarcianâAalenian succession of southern Beaujolais, RhÃne, France. Geological Magazine

  • [ 4 ] Ichthyosauria - Neoichthyosauria indet.

Belmont dâAzergues (Lafarge quarry), Lower Toarcian (serpentinum Zone) (Jurassic of France)

Where: Rhone, France (45.9Â N, 4.7Â E: paleocoordinates 34.4Â N, 14.7Â E)

When: Harpoceras serpentinum ammonoid zone, Early/Lower Toarcian (183.0 - 182.0 Ma)

Environment/lithology: marine; massive, dolomitic, yellow, muddy limestone

  • Musee des Amis de la Mine in Saint-Pierre La Palud, Rhone department, France (MAMSPLP).

Primary reference: P. Vincent, J. E. Martin, V. Fischer, G. Suan, B. Khalloufi, B. SuchÃras-Marx, A. LÃna, K. Janneau, B. Rouselle and L. Rulleau. 2013. Marine vertebrate remains from the ToarcianâAalenian succession of southern Beaujolais, RhÃne, France. Geological Magazine

  • [ 5 ] Ichthyosauria - Ophthalmosauridae - cf. Platypterygius sp.

Villers-sur-Mer (Cretaceous of France)

Where: Normandy, France (49.3Â N, 0.0Â W: paleocoordinates 38.1Â N, 1.8Â E)

When: Early/Lower Cenomanian (99.7 - 94.3 Ma)

Environment/lithology: marine; lithology not reported

Primary reference: H.-A. Blain, G. Pennetier, and E. Pennetier. 2003. PrÃsence du genre Platypterygius (Ichthyosauria, Reptilia) dans le CÃnomanien infÃrieur de Villers-sur-Mer (Normandie, France). LâEcho des Falaises 7:35-49

  • [ 6 ] Ichthyosauria indet.
  • [ 7 ] Ichthyosauria - Ophthalmosauridae - Platypterygius campylodon

Octeville (Cretaceous of France) aka: Ichthyosaur locality

Where: Normandy, France (49.6Â N, 0.1Â E: paleocoordinates 37.9Â N, 2.9Â E)

When: Late/Upper Albian (105.3 - 99.7 Ma)

Environment/lithology: marine; lithology not reported

Primary reference: H.-A. Blain, G. Pennetier, and E. Pennetier. 2003. PrÃsence du genre Platypterygius (Ichthyosauria, Reptilia) dans le CÃnomanien infÃrieur de Villers-sur-Mer (Normandie, France). LâEcho des Falaises 7:35-49

  • [ 8 ] Ichthyosauria - Temnodontosaurus burgundiae sp. ( originally Leptopterygius burgundiae)

Burgundy icthyosaur locality (Jurassic of France) aka: Temnodontosaurus burgundiae locality

Where: Saint Columbe, Burgundy, France (47.5Â N, 4.3Â E: paleocoordinates 35.8Â N, 12.4Â E)

When: Early/Lower Jurassic (201.6 - 175.6 Ma)

Environment/lithology: marine; lithology not reported

Note: The validity of the species T. burgundiae has been disputed. In 1995, McGowan proposed Leptopterygius burgundiae should be placed in Temnodontosaurus. The paleontologist Michael Maisch does not see T. burgundiae as belonging to Temnodontosaurus. In 1998, Maisch identified this name as a junior synonym of T. trigonodon. Other specialists recognize T. burgundiae as a species including Martin Sander who described in 2000 specimens from the Toarcian of the Holzmaden area of Germany and from France as being Temnodontosaurus burgundiae.

Primary reference: P. M. Sander. 2000. Ichthyosauria: their diversity, distribution and phylogeny. Palaeontologische Zeitschrift 74(1/2):1-35

  • [ 9 ] Ichthyosauria - Ophthalmosauridae - cf. Platypterygius hercynicus, Platypterygius hercynicus Fischer 2012

Saint-Jouin ichthyosaur (Cretaceous of France) Also known as SaintâJouinâBruneval; Platypterygius hercynicus referred specimen

Where: Basse-Normandie, France (49.6Â N, 0.2Â E: paleocoordinates 38.0Â N, 2.9Â E)

When: Mortoniceras inflatum ammonoid zone, Late/Upper Albian (105.3 - 99.7 Ma)

Environment/lithology: marine; glauconitic sandstone

Collected by M. Debris; reposited in the MNHN

Primary reference: E. Buffetaut. 1977. Remarques preliminaires sur l'ichthyosaur de Saint-Jouin. Bulletin de la Societe Geologique de Normandie et des amies du Museum du Havre 64(1):17-19



Hope this helps

John Schneiderman

john-schneiderman@cox.net

On August 19, 2020 at 11:12 AM Gregory Paul <gsp1954@aol.com> wrote:


I am looking for the names of the French formations that the species T. trigonodon has been found in (already know it is the Posidonienshiefer in Germany).Â

GSPaul


Â


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