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Lycorhinus angustidens
Taxonomy
Lycorhinus angustidens was named by Haughton (1924). Its type specimen is SAM 3606, a mandible, and it is a 3D body fossil. Its type locality is Paballong, Mount Fletcher (zone B/2), which is in a Hettangian/Sinemurian terrestrial horizon in the Elliot Formation of South Africa.
It was considered a nomen dubium by Charig and Crompton (1974).
It was considered a nomen dubium by Charig and Crompton (1974).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1924 | Lycorhinus angustidens Haughton |
| 1954 | Lycorhinus angustidens Haughton and Brink p. 170 |
| 1962 | Lycorhinus angustidens Crompton and Charig pp. 1076-1077 |
| 1963 | Lycorhinus angustidens Kermack p. 2 |
| 1970 | Lycorhinus angustidens Ellenberger p. 348 |
| 1970 | Lycorhinus angustidens Thulborn p. 236 |
| 1974 | Lycorhinus angustidens Thulborn p. 153 |
| 1975 | Lanasaurus scalpridens Gow |
| 1975 | Lycorhinus angustidens Hopson pp. 303-304 |
| 1975 | Lycorhinus angustidens Thulborn p. 129 |
| 1978 | Lycorhinus angustidens Thuborn p. 187 |
| 1983 | Lanasaurus scalpridens Weishampel and Weishampel p. 44 |
| 1983 | Lycorhinus angustidens Weishampel and Weishampel p. 44 |
| 1984 | Lanasaurus scalpridens Olsen and Galton p. 91 |
| 1984 | Lycorhinus angustidens Olsen and Galton p. 91 |
| 1990 | Lanasaurus scalpridens Weishampel and Witmer p. 487 |
| 1990 | Lycorhinus angustidens Weishampel and Witmer p. 487 |
| 1992 | Lanasaurus scalpridens Weishampel and Heinrich p. 173 |
| 1994 | Lycorhinus angustidens Olshevsky and Ford p. 91 |
| 1997 | Lycorhinus angustidens Chinsamy p. 677 |
| 1997 | Lycorhinus angustidens Smith p. 317 |
| 2004 | Lycorhinus angustidens Norman et al. p. 394 |
| 2008 | Lycorhinus angustidens Butler et al. p. 709 |
| 2008 | Lycorhinus angustidens Butler et al. p. 10 |
| 2008 | Lycorhinus angustidens Irmis and Knoll p. 123 |
| 2011 | Lycorhinus angustidens Norman et al. p. 233–234 |
| 2011 | Lanasaurus scalpridens Norman et al. p. 239 |
| 2012 | Lycorhinus angustidens Han et al. p. 1391 fig. 14 |
| 2012 | Lycorhinus angustidens Sereno p. 133 figs. 3, 73-80 |
| 2016 | Lycorhinus angustidens Becerra et al. p. 568 |
| 2018 | Lycorhinus angustidens Bell et al. p. 29 |
| 2020 | Lycorhinus angustidens Breeden and Rowe p. 2 |
| 2020 | Lycorhinus angustidens Desojo et al. p. 25 |
| 2020 | Lycorhinus angustidens 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.
†Lycorhinus angustidens Haughton 1924
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Invalid names: Lanasaurus scalpridens Gow 1975 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. J. Butler et al. 2008 | The marked medial curvature of the dentary and maxillary tooth rows.
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| D. B. Norman et al. 2011 | Lycorhinus angustidens is retained provisionally as a valid taxon on the basis of the following character combination: dentary caniniform present; diastema between caniniform and first postcaniniform tooth is short, equal in length to the anteroposterior length of the first postcaniniform crown; postcaniniform crowns are closely packed and adjacent crowns contact one another (with some overlap); lateral and medial surfaces of the postcaniniform crowns possess a distinct basal swelling (‘cingulum’) and are therefore expanded mediolaterally above the root; postcaniniform crowns are expanded anteroposteriorly above the root and therefore possess a ‘neck’. | |
| D. B. Norman et al. 2011 (Lanasaurus scalpridens) | Maxillary tooth row that is strongly bowed inwards along its length; maxillary teeth in labial view possess a posterior ridge that is significantly more strongly developed than is the anterior ridge. | |
| P. C. Sereno 2012 | Heterodontosaurid ornithischian characterized by the follow- ing two autapomorphies: (1) prominent ridge on the distal crown margin running from the first denticle to the cingulum (labial aspect of maxillary crowns, lingual aspect
of dentary crowns); (2) lingually curved maxillary and dentary tooth rows. |
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 (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Hettangian - Sinemurian | South Africa (Free State) | Lanasaurus scalpridens (48828) | |
| Hettangian - Sinemurian | South Africa (Eastern Cape) | Lycorhinus angustidens (type locality: 36669 69696) Lycorhinus angustifrons (137299) |