Undichna
| Undichna Temporal range: Silurian – ? | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Genus: | Undichna |
| Species | |
| |
Undichna is a fish-fin, or fish-swimming fossil trail left as a fossil impression on a substrate, or the opposite impression on an overlying substrate; this type of fossil is an ichnofossil, in this case a specific ichnogenus, Undichna; the term "undichna" is composed of the words: 'und'–'ichna', for "wave-trace".
At present, the oldest known Undichna were made by Cephalaspids, that only had presumptive motion scenarios, due to the physiological form of the cephalaspids as predating the teleosts, (bony fishes). The trails are from the border of England and Wales, from 400 mya, in an ancient riverbed environment.
See also
- Lateral undulation, a type of undulation for fish, sea animals, and snakes
- Trace fossil
- Fossil trackway
- Cephalaspid
External links
This article is issued from Wikipedia - version of the Monday, March 16, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.