Geisonoceratidae
| Geisonoceratidae Temporal range:
| |
|---|---|
| Fossil of Geisonoceras species | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Order: | †Orthocerida |
| Family: | †Geisonoceratidae Zhuravleva, 1959 |
| Genera | |
| |
Geisonoceratidae is an extinct family of orthoceroid cephalopods endemic to what would be Asia, Europe, and North America from the Middle Ordovician to the Middle Devonian, living from about 470—380 mya, existing for approximately 90 million years.
Zhuravlevia was previously thought to be a member of this group, but was later reassigned to Mixosiphonata in 2017.