Centrosaurinae
| Centrosaurines Temporal range: Late Cretaceous,
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|---|---|
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| Various species of centrosaurines | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Neornithischia |
| Clade: | †Ceratopsia |
| Family: | †Ceratopsidae |
| Subfamily: | †Centrosaurinae Lambe, 1915 |
| Type species | |
| Centrosaurus apertus Lambe, 1904
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| Synonyms | |
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The Centrosaurinae is a subfamily of ceratopsid dinosaurs named by paleontologist Lawrence Lambe, in 1915, with Centrosaurus as the type genus. The centrosaurines are further divided into two tribes, the centrosaurins and the pachyrhinosaurins.[1]
Classification
The cladogram presented here follows a 2011 phylogenetic analysis by Fiorillo and Tykoski.[2]
| Centrosaurinae |
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Reproduction
Possible neonate sized centrosaurine fossils have been documented in the scientific literature.[3] Research indicates that centrosaurines did not achieve adult morphology with its accompanying mating signals until nearly fully grown.[4] Relative age of the animals was determined based on the size, degree of coossification, secondary ossification, and growth related changes in bone texture.[4] Sampson finds commonality between the retarded growth of mating signals in centrosaurines and the extended adolescence of animals whose social structures are ranked hierarchies founded on age-related differences.[4] In these sorts of groups young males are typically sexually mature for several years before actually beginning to breed, when their mating signals are most fully developed.[5] Females, by contrast due not have such an extended adolescence.[5]
Footnotes
- ^ Sampson (1995).
- ^ Fiorillo, A.R. and Tykoski, R.S.T. (in press). "A new species of the centrosaurine ceratopsid Pachyrhinosaurus from the North Slope (Prince Creek Formation: Maastrichtian) of Alaska." Acta Palaeontologica Polonica, available online 26 Aug 2011. doi:10.4202/app.2011.0033
- ^ "Abstract," Tanke and Brett-Surman (2001). Page 207.
- ^ a b c "Retarded Growth of Mating Signals," Sampson (2001); page 270.
- ^ a b "Sociological Correlates in Extant Vertebrates," Sampson (2001); page 265.
References
- Sampson, S. D. (1995b). "Two new horned dinosaurs from the Upper Cretaceous Two Medicine Formation of Montana; with a phylogenetic analysis of the Centrosaurinae (Ornithischia: Ceratopsidae)." Journal of Vertebrate Paleontology, 15(4): 743-760.
- Sampson, S. D., 2001, Speculations on the socioecology of Ceratopsid dinosaurs (Orinthischia: Neoceratopsia): In: Mesozoic Vertebrate Life, edited by Tanke, D. H., and Carpenter, K., Indiana University Press, pp. 263-276.
- Tanke, D.H. and Brett-Surman, M.K. 2001. Evidence of Hatchling and Nestling-Size Hadrosaurs (Reptilia:Ornithischia) from Dinosaur Provincial Park (Dinosaur Park Formation: Campanian), Alberta, Canada. pp. 206-218. In: Mesozoic Vertebrate Life—New Research Inspired by the Paleontology of Philip J. Currie. Edited by D.H. Tanke and K. Carpenter. Indiana University Press: Bloomington. xviii + 577 pp.
