English: Size comparison of the Lower Cretaceous British heterodontosaur Echinodon becklesii. Echinodon is known solely from jaw fragments, so much of this reconstruction is based on the related Fruitadens.
Butler, Richard J.; Galton, Peter, M.; Porro, Laura B.; Chiappe, Luis M.; Henderson, Donald M.; Erickson, Gregory M. (2010). "Lower limits of ornithischian dinosaur body size inferred from a new Upper Jurassic heterodontosaurid from North America". Proceedings of the Royal Society B: Biological Sciences277 (1680): 375–381. https://doi.org/10.1098/rspb.2009.1494%7Curl=https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2842649/.
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