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Abrictosaurus consors

Reptilia - Heterodontosauridae

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).

Synonymy list
YearName and author
1974Lycorhinus consors Thulborn p. 153 figs. 2-4
1975Abrictosaurus consors Hopson pp. 304-305
1978Lycorhinus consors Thuborn p. 187
1983Abrictosaurus consors Weishampel and Weishampel p. 44
1984Abrictosaurus consors Olsen and Galton p. 91
1990Abrictosaurus consors Weishampel and Witmer p. 487
1992Abrictosaurus consors Weishampel and Heinrich p. 173
1994Abrictosaurus consors Olshevsky and Ford p. 91
1997Abrictosaurus consors Smith p. 317
2004Abrictosaurus consors Norman et al. p. 394
2007Abrictosaurus consors Butler et al. p. S14
2008Abrictosaurus consors Butler et al. p. 8
2008Abrictosaurus consors Irmis and Knoll p. 123
2011Abrictosaurus consors Norman et al. p. 236
2011Abrictosaurus consors Porro et al. p. 361
2012Abrictosaurus consors Han et al. p. 1391 fig. 14
2012Abrictosaurus consors Sereno p. 69 figs. 5A, 31-37
2020Abrictosaurus consors Dieudonné et al.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
Sauropsida
RankNameAuthor
classReptilia
subclassEureptilia()
Romeriida
Diapsida()
Archosauromorpha(Huene 1946)
Crocopoda
ArchosauriformesGauthier 1986
Eucrocopoda
Archosauria()
informalAvemetatarsalia
Ornithodira
Dinosauromorpha
Dinosauriformes
Dinosauria()
Ornithischia()
familyHeterodontosauridae
subfamilyHeterodontosaurinae
genusAbrictosaurus
speciesconsors()

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
ReferenceDiagnosis
R. J. Butler et al. 2008Arched diastema between premaxilla and maxilla present; enlarged caniniform teeth absent from the premaxilla and dentary.
D. B. Norman et al. 2011Heterodontosaurid 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 2012Heterodontosaurid 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
Composition: hydroxyapatiteo
Entire body: yeso
Adult length: 10 to < 100o
Adult width: 1.0 to < 10o
Adult height: 1.0 to < 10o
Architecture: compact or denseo
Ontogeny: accretion, modification of partso
Grouping: gregariouso
Environment: terrestrialo
Locomotion: actively mobileo
Life habit: ground dwellingo
Diet: herbivoreo
Reproduction: oviparouso
Dispersal: direct/internalo
Dispersal 2: mobileo
Created: 2004-12-14 12:50:52
Modified: 2004-12-14 14:50:52
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 - Sinemurian201.3 - 190.8Lesotho (Qacha's Nek) Lycorhinus consors (type locality: 69695)