| Circothecidae | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Superphylum: | Lophotrochozoa |
| Class: | †Hyolitha |
| Order: | †Orthothecida (?) |
| Family: | †Circothecidae |
Circothecidae are a family of Cambrian problematica, sometimes attributed to the Hyolitha,[1] though some authors suggest (on the basis of no specified evidence) that they are definitely not.[2]
References
- ↑ Brasier, M. D. (1986). The succession of small shelly fossils (especially conoidal microfossils) from English Precambrian–Cambrian boundary beds. Geological Magazine, 123(3), 237–256. doi:10.1017/S0016756800034737
- ↑ Webers, G. F., & Yochelson, E. L. (1989). Late Cambrian molluscan faunas and the origin of the Cephalopoda. Geological Society, London, Special Publications, 47(1), 29–42. doi:10.1144/gsl.sp.1989.047.01.04
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