Below, you see a list with possible ichnogenera for a cylindrical, passively filled, (sub)horizontal, unbranched burrow without a lining. Click on them to get detailed descriptions of the ichnogenus and a list of its ichnospecies. (Please allow for pop-up windows):

• Amanitichnus (Ichnogenus includes ornamented ichnospecies)
• Communichnus
• Cylindricum (Taxonomical status unclear, use not recommended)
• Digitichnus (Taxonomical status unclear, use not recommended)
• Funalichnus (Ichnogenus includes ornamented ichnospecies)
• Lunulichnus (Taxonomical status unclear, use not recommended; ichnogenus includes ornamented ichnospecies)
• Macanopsis
• Metaichna
• Neoskolithos (Taxonomical status unclear, use not recommended)
• Pilichnia (Taxonomical status unclear, use not recommended)
• Pustulichnus
• Spirographites (Taxonomical status unclear, use not recommended; ichnogenus includes ornamented ichnospecies)
• Trusheimichnus