Family
Zaphrentidae Milne-Edwards et Haime, 1850
| Images | ||||||
|---|---|---|---|---|---|---|
| TUG 184-2 | Heliophyllum | Heliophyllum halli Edwards & Haime, 1851 | Ontario | Middle Devonian | Hamilton | |||
| TUG 184-4 | Heliophyllum | Heliophyllum canadense Billings, 1859 | Onondaga | Middle Devonian | Onondaga Fm. |