| Ussuritidae Temporal range: | |
|---|---|
 | |
| Fossil of Monophyllites sphaerophyllus from Bosnia, on display at Galerie de paléontologie et d'anatomie comparée in Paris | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | † Ammonoidea |
| Order: | † Ammonitida |
| Suborder: | † Phylloceratina |
| Family: | † Ussuritidae Hyatt, 1900 |
Ussuritidae are ancestral, Triassic, Phylloceratina characterized by generally smooth, discoidal, evolute shells with rounded venters and little or no ornamentation and by sutures with primitive monophyllitic saddles with a single terminal branch or leaflet. [1]
The Ussuritidae are most likely derived from the Dieneroceratidae [1] and give rise to the Discophyllitidae. Seven genera are included:
Genera are distinguished on the basis of shell morphology and characteristics of the suture. [1]
Ussuritidae are also known as the Monophyllitidae, a junior synonym. Palaeophyllitidae, for Palaeophyllites, is sometimes found in the literature. [2]
