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Abrictosaurus consors
Taxonomy
Lycorhinus consors was named by Thulborn (1974). Its type specimen is UCL B54, a partial skeleton, and it is a 3D body fossil. Its type locality is Noosi (UCL), which is in a Hettangian/Sinemurian terrestrial sandstone in the Elliot Formation of Lesotho. It is the type species of Lycorhinus, Abrictosaurus.
It was recombined as Abrictosaurus consors by Hopson (1975), Weishampel and Weishampel (1983), Olsen and Galton (1984), Weishampel and Witmer (1990), Weishampel and Heinrich (1992), Olshevsky and Ford (1994), Smith (1997), Norman et al. (2004), Butler et al. (2007), Butler et al. (2008), Irmis and Knoll (2008), Norman et al. (2011), Porro et al. (2011), Sereno (2012), Han et al. (2012) and Dieudonné et al. (2020).
It was recombined as Abrictosaurus consors by Hopson (1975), Weishampel and Weishampel (1983), Olsen and Galton (1984), Weishampel and Witmer (1990), Weishampel and Heinrich (1992), Olshevsky and Ford (1994), Smith (1997), Norman et al. (2004), Butler et al. (2007), Butler et al. (2008), Irmis and Knoll (2008), Norman et al. (2011), Porro et al. (2011), Sereno (2012), Han et al. (2012) and Dieudonné et al. (2020).
Synonymy list
| Year | Name and author |
|---|---|
| 1974 | Lycorhinus consors Thulborn p. 153 figs. 2-4 |
| 1975 | Abrictosaurus consors Hopson pp. 304-305 |
| 1978 | Lycorhinus consors Thuborn p. 187 |
| 1983 | Abrictosaurus consors Weishampel and Weishampel p. 44 |
| 1984 | Abrictosaurus consors Olsen and Galton p. 91 |
| 1990 | Abrictosaurus consors Weishampel and Witmer p. 487 |
| 1992 | Abrictosaurus consors Weishampel and Heinrich p. 173 |
| 1994 | Abrictosaurus consors Olshevsky and Ford p. 91 |
| 1997 | Abrictosaurus consors Smith p. 317 |
| 2004 | Abrictosaurus consors Norman et al. p. 394 |
| 2007 | Abrictosaurus consors Butler et al. p. S14 |
| 2008 | Abrictosaurus consors Butler et al. p. 8 |
| 2008 | Abrictosaurus consors Irmis and Knoll p. 123 |
| 2011 | Abrictosaurus consors Norman et al. p. 236 |
| 2011 | Abrictosaurus consors Porro et al. p. 361 |
| 2012 | Abrictosaurus consors Han et al. p. 1391 fig. 14 |
| 2012 | Abrictosaurus consors Sereno p. 69 figs. 5A, 31-37 |
| 2020 | Abrictosaurus consors 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.
†Abrictosaurus consors Thulborn 1974
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. J. Butler et al. 2008 | Arched diastema between premaxilla and maxilla present; enlarged caniniform teeth absent from the premaxilla and dentary. | |
| D. B. Norman et al. 2011 | Heterodontosaurid that lacks enlarged caniniform premaxillary and dentary teeth; anterior end of dentary ramus dorsoventrally deeper than mid-section; 12 maxillary and 14 dentary crowns; crowns are generally leaf-shaped in profile, but show little development of a median (primary) ridge and show only weak development of anterior and posterior ridges; prominent laterally projecting maxillary shelf is absent, and there is, consequently, no well-marked cheek recess; | |
| P. C. Sereno 2012 | Heterodontosaurid ornithischian characterized by the follow- ing autapomorphies: (1) premaxillary tooth 2 and 3 with tall, subcylindrical crowns, the latter possibly representing a reduced caniniform tooth; (2) dentary tooth 2 with subcylindrical crown, possibly representing a reduced caniniform tooth; (3) maxillary and dentary teeth with flat lateral and medial crown surfaces lacking discrete marginal or median ridges; and (4) maxillary crowns in the middle of the tooth row have deep parallel-sided crowns that do not expand in mesiodistal width toward their apex. Un- like other heterodontosaurids, there is no dentary or premaxillary caniniform teeth, although both the dentary and premaxillary have teeth with subcylindrical crowns that may be reduced caniniform teeth. |
Measurements
No measurements are available
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| Source: o = order | |||||
| Reference: Marsh 1875 | |||||
Age range: base of the Hettangian to the top of the Sinemurian or 201.30000 to 190.80000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Hettangian - Sinemurian | Lesotho (Qacha's Nek) | Lycorhinus consors (type locality: 69695) |