Below, you see a list with possible ichnogenera for a passively filled, unlined (sub)horizontal, branched burrow with a laminar appearance or U- or J-like shape. Click on them to get detailed descriptions of the ichnogenus and a list of its ichnospecies. (Please allow for pop-up windows):

• Shanwangichnus (Ichnogenus usually unbranched, but may be branched)