Below, you see a list with possible ichnogenera for an actively 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):

• Ilmenichnus (Taxonomic status unclear, use not recommended; ichnogenus may be branched or unbranched)
• Multilamella (Ichnogenus may also occur as surface trace (track, trail, impression, etc.))
• Rhizocorallium (May be branched or unbranched)