Family
Heterorthidae Schuchert et Cooper, 1931
| Images | ||||||
|---|---|---|---|---|---|---|
| GIT 804-172 | Heterorthina alternata | Heterorthina alternata | Caradoc district, Salop | Upper Ordovician |
| Images | ||||||
|---|---|---|---|---|---|---|
| GIT 804-172 | Heterorthina alternata | Heterorthina alternata | Caradoc district, Salop | Upper Ordovician |