Sânpetru Formation
Geological formation in Romania
From Wikipedia, the free encyclopedia
The Sânpetru Formation is an early Maastrichtian geologic formation located in Romania, near Sânpetru village, part of Sântămăria-Orlea commune. Dinosaur remains are among the fossils that have been recovered from the formation, comprising some of the fauna of Hațeg Island.[1]
| Sânpetru Formation | |
|---|---|
| Stratigraphic range: Early Maastrichtian ~ | |
Sibișel River near the Sânpetru Formation | |
| Type | Geological formation |
| Sub-units | Lower & Upper Members |
| Underlies | Miocene deposits |
| Overlies | Strei Formation, flysch |
| Thickness | 2,500 m (8,200 ft) of which 860 m (2,820 ft) exposed |
| Lithology | |
| Primary | Mudstone, sandstone |
| Other | Conglomerate |
| Location | |
| Coordinates | 45.6°N 22.9°E |
| Approximate paleocoordinates | 30.5°N 22.1°E |
| Region | Hunedoara |
| Country | Romania |
| Extent | Central Hațeg Basin |
| Type section | |
| Named for | Sânpetru |
  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
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Amphibians
| Amphibians of the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Albanerpeton | Indeterminate | Albanerpetontid | ||||
| Paralatonia | P. transylvanica | Frog | ||||
Turtles
| Turtles of the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Kallokibotion | K. bajazidi | |||||
| Dortokidae | Indeterminate | |||||
| Emydidae | Indeterminate | |||||
Squamates
| Squamates of the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Barbatteius | B. vremiri | |||||
| Becklesius | B. nopcsai | |||||
| Bicuspidon | B. hatzegiensis | |||||
| Lacertilia | Indeterminate | 5 distinct taxa | ||||
| Madtsoiidae | Indeterminate | Snake | ||||
Crocodyliformes
| Crocodyliformes of the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Allodaposuchus[3] | Indeterminate |  | ||||
| Sabresuchus | S. sympiestodon | |||||
Ornithischians
| Ornithischians of the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Struthiosaurus[4] | S. transylvanicus[4] | Sânpetru | A skull and partial skeleton. | A nodosaur. |  | |
| Telmatosaurus[4][5] | T. transsylvanicus[4] | "[Five to ten] fragmentary skulls, some with associated postcrania, mixed age classes."[6] | A small hadrosauromorph. |
 | ||
| Zalmoxes[7] | Z. robustus | Many remains | Originally identified as a rhabdodontid ornithopod, but possibly a ceratopsian closely related to Ajkaceratops and Ferenceratops |  | ||
| Ferenceratops[8] | F. shqiperorum[4] | Sibișel Valley | Upper | A left dentary, sacrum, right scapula, right coracoid, partial left ilium, partial right ilium, right ischium, left distal ischium and left femur. | Originally "Zalmoxes" shqiperorum but subsequently recognized as a distinct ceratopsian taxon closely related to Ajkaceratops |  |
Sauropods
| Sauropods of the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Abundance | Notes | Images |
| Magyarosaurus[4] | M. dacus[4] | A dwarf sauropod. |  | |||
| Paludititan[9] | P. nalatzensis | A partial skeleton lacking the skull. | A dwarf sauropod |  | ||
| Petrustitan[10] | P. hungaricus | Sibișel River Valley. | Upper | Partial skeleton composed of caudal vertebrae, right ulna, right radius, right metacarpal, right ilium, and left fibula. | A dwarf sauropod, originally assigned to the genus Magyarosaurus |  |
Theropods
| Theropods of the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Gargantuavis | Indeterminate | Pelvis[11] |  | |||
| Bradycneme[4] | B. draculae[4] | "Distal tibiotarsus."[12] |  | |||
| Elopteryx[4][13] | E. nopcsai[4] | "Fragmentary femur."[12] |  | |||
| Euronychodon[14] | Indeterminate[14] | |||||
| Heptasteornis[4] | H. andrewsi[4] | "Distal tibiotarsus."[15] | ||||
| Megalosaurus[4] | M. hungaricus | "Tooth."[16] | ||||
Pterosaurs
| Pterosaurs reported from the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Eurazhdarcho | E.langendorfensis | An azhdarchid pterosaur. |  | |||
| Hatzegopteryx | H.thambema | A giant azhdarchid pterosaur. |  | |||
Mammals
| Mammals from the Sânpetru Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
| Barbatodon | B. transylvanicus | Kogaionid | ||||
| Kogaionon | K. ungureanui | Kogaionid |  | |||