Figure 103 from: Sereno P (2012) Taxonomy, morphology, masticatory function and phylogeny of heterodontosaurid dinosaurs. ZooKeys 226: 1-225. https://doi.org/10.3897/zookeys.226.2840

Figure 103 - Phylogenetic hypotheses for heterodontosaurids by Butler and colleagues. A Heterodontosaurids with the exception of Pisanosaurus allied with euornithopods (after Butler 2005) B Heterodontosaurids and Pisanosaurus as basal ornithischians (after Butler et al. 2007) C Heterodontosaurids and Pisanosaurus as basal ornithischians with Lycorhinus (NHMUK RU A100, formerly BMNH A100) closer to Heterodontosaurus than Abrictosaurus (after Butler et al. 2008) D Heterodontosaurid relationships including Echinodon and Fruitadens as basal taxa (after Butler et al. 2009) E Heterodontosaurid relationships as in Butler et al. (2008) (after Norman et al. 2011). Some terminal taxa in the original analyses are collapsed into suprageneric taxa; red text indicates heterodontosaurid taxa; "BMNH A100" is now catalogued as NHMUK RU A100.