Below, you see a list with possible ichnogenera for a lined, passively filled, (sub)horizontal, unbranched burrow with a radial morphology. Click on them to get detailed descriptions of the ichnogenus and a list of its ichnospecies. (Please allow for pop-up windows):

• Arenituba  (Usually branched, but may be unbranched)
• Asterichnus (Taxonomic status unclear, use not recommended; may also occur as surface trace (track, trail, impression, etc.))