| Orthotheca Temporal range: Early Cambrian–Early Devonian[1] |
|
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca (?) |
| Class: | Hyolitha |
| Family: | Orthothecidae Sysoev, 1958 |
| Genus: | Orthotheca Pichon, 1946 |
| Species | |
Others, please add... |
|
Orthotheca is a genus of sessile bottom-dwelling hyolith.[1]