pair matrix Scientific name: lycoptera Category: bony fish Origin: Asia - Dawangzhangzi Township, Liaoning Province, China Lycoptera: It is an extinct primitive bony fish belonging to the order Lycoptera. Lived in the late Jurassic-early Cretaceous period Dimensions: 20cm This is a group of fish fossils that are well attached to the substrate. They are very precious and worth collecting. The bottom plate of the fossil is very thin and may crack during transportation. If it cracks, you can use glue to repair it, and the overall viewing will not be affected.