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Fruitadens
Taxonomy
Fruitadens was named by Butler et al. (2010). It was considered monophyletic by Butler et al. (2010) and Sereno (2012).
It was assigned to Heterodontosauridae by Butler et al. (2010), Ruiz-Omeñaca et al. (2010), Han et al. (2012), Sereno (2012), Foster et al. (2016), Madzia et al. (2018) and Carpenter and Galton (2018); and to Heterodontosaurinae by Dieudonné et al. (2020).
It was assigned to Heterodontosauridae by Butler et al. (2010), Ruiz-Omeñaca et al. (2010), Han et al. (2012), Sereno (2012), Foster et al. (2016), Madzia et al. (2018) and Carpenter and Galton (2018); and to Heterodontosaurinae by Dieudonné et al. (2020).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2010 | Fruitadens Butler et al. p. 376 figs. 2, 3 |
| 2010 | Fruitadens Ruiz-Omeñaca et al. p. 84 |
| 2012 | Fruitadens Han et al. p. 1391 fig. 14 |
| 2012 | Fruitadens Sereno p. 48 |
| 2016 | Fruitadens Foster et al. p. 46 |
| 2018 | Fruitadens Carpenter and Galton p. 269 |
| 2018 | Fruitadens Madzia et al. p. 973 fig. 4 |
| 2020 | Fruitadens Dieudonné et al. |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. J. Butler et al. 2010 | Diagnosis as for type and only species:
Small heterodontosaurid ornithischian characterized by the following unique combination of characters, including autapomorphies (*indicates character that is autapomorphic within Heterodontosauridae; **indicates character that is autapomorphic within Ornithischia): (1*) premaxillary crowns small and subequal in size, expanded labiolingually and mesiodistally above the root; (2) maxillary caniniform absent; (3) maxillary/dentary crowns low and triangular, with symmetrically distributed enamel; (4*) denticles extend over half of the maxillary/dentary crowns, not restricted to apical third; (5**) dentary caniniform present but apicobasal height does not exceed that of the largest dentary cheek tooth crown; (6**) small, unserrated, peg-like and procumbent tooth present anterior to the dentary caniniform; (7**) distal end of the tibia with anteromedial flange; (8**) apex of the ascending process of astragalus is formed by a separate ossification; (9**) two large foramina pierce anterior surface of the ascending process of astragalus. |