| Orthotheca Temporal range:
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|---|---|
Scientific classification 
| |
| Kingdom: | Animalia |
| Class: | †Hyolitha |
| Order: | †Orthothecida |
| Family: | †Orthothecidae Sysoev, 1958 |
| Genus: | †Orthotheca Novák, 1886 |
| Species | |
Others, please add... | |
Orthotheca is a genus of sessile bottom-dwelling hyolith.1
References
References
- Malinky, J. M. (2009). "First Occurrence of Orthotheca Novák, 1886 (Hyolitha, Early Devonian) in North America". Journal of Paleontology. 83 (4): 588–596. Bibcode:2009JPal...83..588M. doi:10.1666/08-164R.1. S2CID 130227630.