Ichnogenus
An ichnogenus is a trace fossil. The names are a category of taxonomy for fossil traces whose origin is not exactly known. They are a part of taxonomy called ichnology.
Very common trace fossils are dinosaur trackways and fossil burrows of worm-like creatures in ancient sea floors.
Ichnogenus Media
The ichnogenus Thalassinoides: burrow fossil produced by crustaceans from the Middle Jurassic, Makhtesh Qatan, southern Israel
