Genus
Holoptychius Agassiz, 1839
| Images | ||||||
|---|---|---|---|---|---|---|
| TUG 1597-39 | Holoptychius nobilissimus | Holoptychius nobilissimus Agassiz, 1839 | Devonian | ||||
| TUG 1597-40 | Holoptychius nobilissimus | Holoptychius nobilissimus Agassiz, 1839 | Devonian | ||||
| TUG 1597-41 | Holoptychius nobilissimus | Holoptychius nobilissimus Agassiz, 1839 | Devonian | ||||
| TUG 603-32910 | Holoptychius | Holoptychius andersoni Agassiz | Devonian |