Calvarius
Named for the type locality Serrat del Calvari (Hill of Calvary) in Catalonia, Spain; further derived from Catalan 'calvari' meaning 'suffering', referencing the genus's proximity to the K-Pg extinction event. The species name is from Latin 'rapidus' meaning 'fast', referring to inferred cursorial habits.
Calvarius is an extinct genus of styracosternan ornithopod from the Late Cretaceous (Maastrichtian age) Talarn Formation of Spain. The genus contains a single species, Calvarius rapidus, known from a single metatarsal. The slender morphology of this bone may indicate Calvarius had a cursorial (adapted to run) ecology, in contrast to its slower-moving relatives.
Diagnosis
- Metatarsal IV maximum length/mediolateral width at mid-length ratio greater than nine.
- Segment distal to medial flange longer than combined length of medial flange and proximal extent of metatarsal.
- Prominent medial flange that is dorsoplantarly compressed and with a prominent plantar component in its medioplantar projection.
- Relatively enlarged medially projected dorsomedial corner of distal surface.
Species
Calvarius rapidus Prieto-Márquez & Sellés, 2022
Type species
From Latin 'rapidus' meaning 'fast', referring to the likely cursorial habits inferred from the slender metatarsal anatomy.
- Holotype
- MCD-8734 , Museu de la Conca Dellà
- Material
- Left metatarsal IV (a single skeletal element).
- Horizon
- upper Talarn Formation, Maastrichtian, Late Cretaceous , 72.2–66.0 million years ago
- Locality
- Masia de Ramón, Lleida, Spain
References
- Prieto-Márquez, A.; Sellés, A. (2022). Evolutionary convergence in a small cursorial styracosternan ornithopod dinosaur from western Europe. Journal of Vertebrate Paleontology 42(5). Informa UK Limited. doi:10.1080/02724634.2023.2210632 prieto-márquez2022a
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Jones, B. (2026). The Princeton Encyclopedia of Dinosaurs: Ornithischians. Princeton University Press.
Source of the body length, mass, and hip height estimates.
jones2026a