Planicoxa
From Latin 'planus' meaning 'flat' and 'coxa' meaning 'hip', referring to a distinctive flat feature of the hip bones.
Early Cretaceous stages
Planicoxa is a genus of advanced iguanodontian dinosaur from the Early Cretaceous of North America. It is known from the partial skeletons of several individual specimens. Its fossils were discovered in Utah, United States.
Diagnosis
- Caudal vertebrae bear paired ventral ridges connecting the anterior and posterior chevron facets along the ventral surface.
- Humeral head well developed and extending onto the anterior surface of the humerus.
- Postacetabular blade of the ilium short and horizontally directed, functionally forming an antitrochanter.
Species
Planicoxa venenica DiCroce & Carpenter, 2001
Type species
From Latin 'venenica' meaning 'poison', in reference to the Poison Strip Sandstone Member of the Cedar Mountain Formation where the fossil was discovered.
- Holotype
- DMNH 42504 , Denver Museum of Nature and Science
- Material
- Left ilium.
- Horizon
- Poison Strip Sandstone Member, Cedar Mountain Formation, Aptian, Early Cretaceous , 121.4–113.2 million years ago
- Locality
- Tony's Bone Bed, Utah, United States
References
- DiCroce, T.; Carpenter, K. (2001). A new ornithopod from the Cedar Mountain Formation (Lower Cretaceous) of eastern Utah. Mesozoic Vertebrate Life: New Research Inspired by the Paleontology of Philip J. Currie (Tanke, D. H.; Carpenter, K., eds.) 183-196. Indiana University Press, Bloomington. dicroce2001a
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Jones, B. (2026). The Princeton Encyclopedia of Dinosaurs: Ornithischians. Princeton University Press.
Source of the hip height estimate.
jones2026a