Jydegaard Formation
Jydegaard Formation Stratigraphic range: Early Cretaceous, 145–140 Ma | |
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Type | Geological Formation |
Unit of | Nyker Group |
Underlies | Arnager Greensand Formation |
Overlies | Robbedale Formation |
Lithology | |
Primary | Claystone and Sandstone |
Location | |
Region | Bornholm |
Country | Denmark |
The Jydegaard Formation (also spelt as Jydegård) is a geological formation dating to the Early Cretaceous, about 145 to 140 million years ago. It is on the island of Bornholm, Denmark. Vertebrate fossils have been found in the formation.[1]
Vertebrates
Thin bone fragments have been uncovered that may belong to pterosaurs or birds.[1]
Dinosaurs
A tooth possibly belonging to a juvenile titanosaur has been found in the formation.[1]
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
D. bornholmensis[1] |
Two teeth and possible coprolites.[2] |
| |||
Crocodilomorphs
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
unknown |
Robbedale[1] |
A tooth tentatively referred to Pholidosaurus[3] |
| ||
Fish
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]
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
L. sp[1] |
Robbedale[1] |
Teeth, jaws and scales[1] |
|||
unknown |
Robbedale[2] |
Teeth and scales[2] |
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Parvodus[1] |
P. rugianus[4] |
Robbedale[1] |
Teeth, finspines and head "hooks"[1] |
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P. serrata[5] |
Robbedale[1] |
unknown |
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Turtles
Unidentified turtle carapaces have been uncovered in the Formation.[1]
Lizards
A lower jaw from a lizard has been recovered from the formation.[1]
Bivalves
Color key
|
Notes Uncertain or tentative taxa are in small text; |
Genus | Species | Location | Material | Description | Images |
---|---|---|---|---|---|
Neomiodon[1] |
unknown |
Robbedale[1] |
many specimens[1] |
Neomiodon specimens are thought to be victim to a mass mortality such as poisoning.[1] |
|
unknown |
Robbedale[1] |
many specimens[1] |
Viviparus specimens are thought to be victim to a mass mortality such as poisoning.[1] |
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See also
Footnotes
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Bonde, N.; Cristiansen, P. (2003). "New dinosaurs from Denmark". Comptes Rendus Paleovol. 2 (13). doi:10.1016/51631-0683(03)00009-5.
- 1 2 3 4 Milàn, J.; Rasmussen, B. W.; Bonde, N. (2012). "Coprolites with prey remains from the Lower Cretaceous (Late Berriasian) Jydegaard Formation of Bornholm, Denmark" (PDF). New Mexico Museum of Natural History and Science. Bulletin. 57: 235–240.
- ↑ Schwarz-Wings, D.; Rees, J.; Lindgren, J. (2009). "Lower Cretaceous Mesoeucrocodylians from Scandinavia (Denmark and Sweden)". Cretaceous Research. 30 (5): 1345. doi:10.1016/j.cretres.2009.07.011.
- ↑ "Parvodus rugianus". Paleobiology Database. Retrieved 25 September 2013.
- ↑ "Pleuropholis serrata". Paleobiology Database. Retrieved 25 September 2013.