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

• Fuersichnus (Ichnogenus includes ornamented ichnospecies)
• Furculosus
• Hoplichnus
• Shanwangichnus (May be branched or unbranched)