The Jydegaard Formation (also spelled as 'Jydegård') is a geological formation dating to the

Early Cretaceous The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Pro ...

, about 145-139 million years ago. It is on the island of Bornholm, Denmark. Vertebrate fossils have been found in the formation.

Fossil content

Thin bone fragments have been uncovered that may belong to pterosaurs or birds.

Dinosaurs

A tooth possibly belonging to a juvenile titanosaur has been found in the formation.

Crocodylomorphs

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-

teleostean Actinopterygii (; ), members of which are known as ray-finned fishes, is a class of bony fish. They comprise over 50% of living vertebrate species. The ray-finned fishes are so called because their fins are webs of skin supported by bony or ho ...

s have been uncovered. Amioid scales have also been revealed.

Turtles

Unidentified turtle

carapace A carapace is a Dorsum (biology), dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tor ...

s have been uncovered in the Formation.

Lizards

A lower jaw from a

lizard Lizards are a widespread group of squamate reptiles, with over 7,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic since it excludes the snakes and Amphisbaenia alt ...

has been recovered from the formation.

Bivalves

References

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