Sânpetru Formation

The Sânpetru Formation is a early Maastrichtian geologic formation. Dinosaur remains are among the fossils that have been recovered from the formation.[1] It is located in Romania, near Sânpetru village, part of Sântămăria-Orlea commune. It forms a component of the Hațeg Island fauna.

Sânpetru Formation
Stratigraphic range: Early Maastrichtian
~70–68 Ma
↓
Sibișel River (Strei) near the Sânpetru Formation
TypeGeological formation
Sub-unitsLower & Upper Members
UnderliesMiocene deposits
OverliesStrei Formation, flysch
Thickness2,500 m (8,200 ft)
of which 860 m (2,820 ft) exposed
Lithology
PrimaryMudstone, sandstone
OtherConglomerate
Location
Coordinates45.6°N 22.9°E / 45.6; 22.9
Approximate paleocoordinates30.5°N 22.1°E / 30.5; 22.1
RegionHunedoara
Country Romania
ExtentCentral Hațeg Basin
Type section
Named forSânpetru
Sânpetru Formation (Romania)

Description

The Sânpetru Formation crops out in the central to southern Hațeg Basin along the Bărbat River and comprises sandstones and mudstones deposited in a wet floodplain environment characterized by braided fluvial channels. The formation is correlated with the Densuș-Ciula Formation of the northern section of the same basin, both dating to the Maastrichtian of the Late Cretaceous.[2]

Fossil content

Amphibians
Amphibians of the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages
Albanerpeton Indeterminate Albanerpetonid
Paralatonia P. transylvanica Frog

Turtles
Turtles of the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages
Kallokibotion K. bajazidi
Dortokidae Indeterminate
Emydidae Indeterminate

Squamates
Squamates of the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages
Barbatteius B. vremiri
Becklesius B. nopcsai
Bicuspidon B. hatzegiensis
Lacertilia Indeterminate 5 distinct taxa
Madtsoiidae Indeterminate Snake

Crocodyliformes
Crocodyliformes of the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages
Allodaposuchus[3] Indeterminate
Sabresuchus S. sympiestodon

Ornithischians
Ornithischians of the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages
Struthiosaurus[4] S. transylvanicus[4]
Telmatosaurus[4][5] T. transsylvanicus[4] "[Five to ten] fragmentary skulls, some with associated posctrania, mixed age classes."[6]
Zalmoxes[4] Z. robustus[4]
Z. shqiperorum[4]

Sauropods
Sauropods of the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionAbundanceNotesImages
Magyarosaurus[4] M. dacus[4]
M. hungaricus[4]
M. transsylvanicus[4]

Theropods
Theropods of the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Gargantuavis Indeterminate Pelvis[7]
Bradycneme[4] B. draculae[4] "Distal tibiotarsus."[8]
Elopteryx[4][9] E. nopcsai[4] "Fragmentary femur."[8]
Euronychodon[10] Indeterminate[10]
Heptasteornis[4] H. andrewsi[4] "Distal tibiotarsus."[11]
Megalosaurus[4] M. hungaricus "Tooth."[12]

Pterosaurs
Pterosaurs reported from the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Eurazhdarcho E.langendorfensis
Hatzegopteryx H.thambema

Mammals
Mammals from the Sânpetru Formation
GenusSpeciesLocationStratigraphic positionMaterialNotesImages
Barbatodon B. transylvanicus Kogaionid
Kogaionon K. ungureanui Kogaionid
Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
 Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.
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See also
  • List of dinosaur-bearing rock formations
  • Hateg Island

References
  1. Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
  2. Solomon & Codrea, 2015, p.26
  3. Solomon & Codrea, 2015, p.28
  4. "29.3 Judetul Hunedoara, Romania; 1. Sânpetru Formation," in Weishampel, et al. (2004). Pages 592-593.
  5. Solomon & Codrea, 2015, p.30
  6. "Table 20.1," in Weishampel, et al. (2004). Page 439.
  7. Mayr et al., 2019
  8. "Table 9.1," in Weishampel, et al. (2004). Page 185.
  9. Kessler et al., 2005
  10. Listed as "cf. Euronychodon sp." in "29.3 Judetul Hunedoara, Romania; 1. Sânpetru Formation," in Weishampel, et al. (2004). Pages 592-593.
  11. "Table 9.1," in Weishampel, et al. (2004). Page 186.
  12. "Table 4.1," in Weishampel, et al. (2004). Page 78.

Bibliography
  • Mayr, Gerald; Vlad Codrea; Alexandru Solomon; Marian Bordeianu, and Thierry Smith. 2019. A well-preserved pelvis from the Maastrichtian of Romania suggests that the enigmatic Gargantuavis is neither an ornithurine bird nor an insular endemic. Cretaceous Research 106. 104271. doi:10.1016/j.cretres.2019.104271
  • Solomon, Alexandru, and Vlad Codrea. 2015. Some Maastrichtan vertebrates from fluvial channel fill deposits at Pui (Haṭeg Basin). Muzeul Olteniei Craiova. Oltenia. Studii şi comunicări. Ştiinţele Naturii 31. 26–36. ISSN 1454-6914
  • Kessler, E.; D. Grigorescu, and Z. Csiki. 2005. Elopteryx revisited - A new bird-like specimen from the Maastrichtian of the Hateg Basin (Romania). Acta Palaeontologica Romaniae 5. 249–258.
  • Weishampel, David B.; Peter Dodson, and Halszka (eds.) Osmólska. 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2
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