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

• Astropolichnus (Ichnogenus includes ornamented ichnospecies)
• Bergaueria
• Cardioichnus (Ichnogenus includes ornamented ichnospecies)
• Cheiichnus (Ichnogenus includes ornamented ichnospecies)
• Conostichus (Ichnogenus includes ornamented ichnospecies)
• Lockeia
• Osculichnus
• Pentichnus
• Piscichnus
• Pseudobilobites (Ichnogenus includes ornamented ichnospecies)
• Solanichnium
• Solicyclus (Ichnogenus includes ornamented ichnospecies)