Below, you see a list with possible ichnogenera for burrows with a spherical or alveolar morphology, being unlined and passively filled. Click on each of them to get detailed descriptions of the ichnogenus and a list of its ichnospecies. (Please allow for pop-up windows):
- Attaichnus
- Cellicalichnus
- Daimoniobarax
- Parowanichnus
- Sabiuracolites
- Sphaerichnus (Ichnogenus includes ornamented ichnospecies)
- Vondrichnus
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