Genus
Circotheca Syssoiev, 1958
Selection of related publications
Berg-Madsen, V., Valent, M., Ebbestad, J. O. R. 2018. An orthothecid hyolith with a digestive tract from the early Cambrian of Bornholm, Denmark.  GFF   140,   1,   25-37. DOI:10.1080/11035897.2018.1432680
List of species
1. Circotheca johnstrupi (Holm, 1893) | Cambrian Stage 3
2. Circotheca stylus (Holm, 1893) | Cambrian
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Classification
| Organism group | Biota | 
| Kingdom | Animalia | 
| Phylum | Mollusca | 
| Class | Hyolitha | 
| Family | Circothecidae | 
| Genus | Circotheca | 
| Species | johnstrupi | 
| stylus |