| Jydegaard Formation | |
| Type: | Geological formation |
| Age: | Late Berriasian-early Valanginian ~ |
| Period: | Valanginian |
| Unitof: | Nyker Group |
| Subunits: | Rødbjerg & Tornhøj Members |
| Underlies: | Arnager Greensand Formation |
| Overlies: | Robbedale Formation |
| Region: | Bornholm |
| Prilithology: | Claystone, sandstone |
| Coordinates: | 55.1°N 14.8°W |
| Paleocoordinates: | 47.2°N 21.4°W |
The Jydegaard Formation (also spelled as 'Jydegård') is a geological formation dating to the Early Cretaceous, about 145–139 million years ago. It is on the island of Bornholm, Denmark. Vertebrate fossils have been found in the formation.[1]
Thin bone fragments have been uncovered that may belong to pterosaurs or birds.[1]
A tooth possibly belonging to a juvenile titanosaur has been found in the formation.[1]
Fish remains have been found in coprolites possibly belonging to the dromaeosaur Dromaeosauroides or marine turtles. Also, unidentified pycnodont jaws and two small stem-teleosteans have been uncovered. Amioid scales have also been revealed.[1]
| Genus | Species | Location | Material | Description | Images |
|---|---|---|---|---|---|
| Lepidotes | L. sp | Robbedale | Teeth, jaws and scales | ||
| Hybodus | unknown | Robbedale | Teeth and scales | ||
| Parvodus | P. rugianus[4] | Robbedale | Teeth, finspines and head "hooks" | ||
| Pleuropholis | P. serrata[5] | Robbedale | unknown | ||
Unidentified turtle carapaces have been uncovered in the Formation.[1]
A lower jaw from a lizard has been recovered from the formation.[1]
| Genus | Species | Location | Material | Description | Images |
|---|---|---|---|---|---|
| Neomiodon | unknown | Robbedale | many specimens | Neomiodon specimens are thought to be victim to a mass mortality such as poisoning. | |
| Viviparus | unknown | Robbedale | many specimens | Viviparus specimens are thought to be victim to a mass mortality such as poisoning. | |