Temporal range: 245–237Ma
As with the family, the shell of Ussurites is discoidal, evolute, and generally smooth. The suture is phylletic with divided lobes and simple, rounded, elongate saddles. The ventral lobe is bifurcated, the two branches sharply serrated. The two lateral lobes are asymmetrically trifurcated, sections sharply pointed. The first lateral saddle (closest to the venter) is fairly evenly rounded, the second and third are narrower and asymmetric, leaning away from the venter and toward the umbilicus.
- Arkell, et al., 1957. Mesozoic Ammonoides; Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press. p.L185-186.
|This ammonite-related article is a stub. You can help Wikipedia by expanding it.|