There are five more possible species of which trace fossils have been found.

Trace fossils also provide our earliest evidence of animal life on land.

Trace fossils are classified in various ways for different purposes.

Some of these dinosaurs left behind an abundant trace fossil record.

The state's Cambrian life left behind a rich trace fossil record.

Several species of insect trace fossils have been recorded as well.

It is only known from trace fossils of leaf mines.

The trace fossil is found in marine and freshwater environments.

As such, they can be broadly considered to be trace fossils.

Nevada's trace fossil record from the Pleistocene is very rich.

However, most trace fossils lack sufficiently complex details to allow such classification.

Local trace fossils include bore marks left by ancient worms.

Trace fossils are generally difficult or impossible to assign to a specific maker.

The worms left behind trace fossils like tubes and borings.

They are trace fossils and can be subdivided into ichnotaxa.

Worms left behind trace fossils in the form of their borings and tubes.

However, trace fossils and paleopathology can give insight into dinosaur behavior.

Trace fossils of crocodilians and other vertebrates have also been discovered.

The problem with these trace fossils is that no fossil of Gastornis has been found to be younger than about 45 million years.

Many trace fossils are known from these deposits.

Most trace fossils are usually readily identified by reference to similar phenomena in modern environments.

These trace fossils are usually divided into macroborings and microborings.

It is marked by a sudden abundance of hard substrate trace fossils.

Vertebrates are known from both body fossils and trace fossils.

Depictions of trace fossils in indigenous rock art are known from throughout North America.