Gresslyosaurus

Gresslyosaurus (meaning "Amanz Gressly's lizard") is a genus of plateosaurian sauropodomorph dinosaur that lived during the Late Triassic period, around 214 to 204 million years ago, in Switzerland.

Gresslyosaurus
Temporal range: Late Triassic,
~
Gresslyosaurus ingens holotype
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Clade: Dinosauria
Clade: Saurischia
Clade: †Sauropodomorpha
Clade: †Plateosauria
Genus: †Gresslyosaurus
Rütimeyer, 1857
Type species
†Gresslyosaurus ingens
Rütimeyer, 1857
Other species[1]
  • †Gresslyosaurus plieningeri Huene 1905
  • †Gresslyosaurus robustus Huene 1905
  • †Gresslyosaurus torgeri Jaekel 1911
Synonyms[1]
  • Dinosaurus Rütimeyer, 1856 (nomen nudum)

Taxonomy

Gresslyosaurus was originally dubbed "Dinosaurus gresslyi" by Rütimeyer (1856) on the basis of postcranial remains discovered in the Late Triassic (late Norian-Rhaetian) Knollenmergel of northern Switzerland around 1840 by Amanz Gressly, but that name is a nomen nudum as it was described in an abstract.[2] Dinosaurus anyway was already in use for a therapsid, so Rütimeyer (1857) formally described the material as Gresslyosaurus ingens.[3] Lydekker (1888) synonymized Gresslyosaurus with Zanclodon, but von Huene (1908) removed sauropodomorph material assigned to Zanclodon (which he assigned to Theropoda) and Gresslyosaurus along with Plateosaurus as sauropodomorphs.[4] A number of authors (e.g. Steel 1970) listed Gresslyosaurus as valid, but Galton (1976, 1985, 1986) synonymized it with Plateosaurus based on comparisons with Plateosaurus material from Germany.[5][6][7][8] Moser (2003), however, found Gresslyosaurus to be generically distinct from Plateosaurus, and in their description of Schleitheimia, Rauhut et al. (2020) found a number of differences between Schleitheimia and Gresslyosaurus.[9][10]

References
  1. "Gresslyosaurus". Fossilworks. Retrieved 5 April 2021 from the Paleobiology Database.{{cite web}}: CS1 maint: postscript (link)
  2. Rutimeyer, 1856. Dinosaurus gresslyi. Bibliotheque Universelle des Sciences Belles-Lettres et Arts, Geneve. September, 53.
  3. Rutimeyer, 1857. Reptilienknochen aus dem Keuper. Allgemeine Schweizerische Gesellschaft fur de Gesammten Naturwissenschaften. 41, 62-64.
  4. F. v. Huene. 1908. Die Dinosaurier der Europäischen Triasformation mit berücksichtigung der Ausseuropäischen vorkommnisse [The dinosaurs of the European Triassic formations with consideration of occurrences outside Europe]. Geologische und Palaeontologische Abhandlungen Suppl. 1(1):1-419
  5. R. Steel. 1970. Part 14. Saurischia. Handbuch der Paläoherpetologie/Encyclopedia of Paleoherpetology. Gustav Fischer Verlag, Stuttgart 1-87
  6. P. M. Galton. 1976. Prosauropod dinosaurs (Reptilia: Saurischia) of North America. Postilla 169:1-98
  7. P. M. Galton. 1985. Cranial anatomy of the prosauropod dinosaur Plateosaurus from the Knollenmergel (Middle Keuper, Upper Triassic) of Germany. II. All the cranial materials and details of soft-part anatomy. Geologica et Palaeontologica 19:119-159
  8. Galton, Peter M. (1986). "Prosauropod dinosaur Plateosaurus (=Gresslyosaurus) (Saurischia: Sauropodomorpha) from the Upper Triassic of Switzerland". Geologica et Palaeontologica. 20: 167–183.
  9. Moser, M. (2003). Plateosaurus engelhardti Meyer, 1837 (Dinosauria, Sauropodomorpha) aus dem Feuerletten (Mittelkeuper; Obertrias) von Bayern. [Plateosaurus engelhardti Meyer, 1837 (Dinosauria, Sauropodomorpha) from the Feuerletten (Mittelkeuper; Obertrias) of Bavaria]. Zitteliana Reihe B: Abhandlungen der Bayerischen Staatssammlung für Paläontologie und Geologie (in German and English). 24: 1–186. OCLC 54854853.
  10. Oliver W. M. Rauhut; Femke M. Holwerda; Heinz Furrer (2020). "A derived sauropodiform dinosaur and other sauropodomorph material from the Late Triassic of Canton Schaffhausen, Switzerland". Swiss Journal of Geosciences. 113 (1): Article number 8. doi:10.1186/s00015-020-00360-8.
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