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Rakomeryx sinclairi
Taxonomy
Cervavus sinclairi was named by Matthew (1918). Its type specimen is AMNH 17336, 17337, 17338, a mandible (three lower jaws), and it is a 3D body fossil. Its type locality is Snake Creek Fauna, which is in a Barstovian/Clarendonian channel sandstone in Nebraska.
It was recombined as Blastomeryx sinclairi by Matthew (1924); it was synonymized subjectively with Cranioceras unicornis by Frick (1937), Webb (1969); it was recombined as Rakomeryx sinclairi by Skinner et al. (1977), Janis and Manning (1998), Prothero and Liter (2007), Prothero and Liter (2008).
It was recombined as Blastomeryx sinclairi by Matthew (1924); it was synonymized subjectively with Cranioceras unicornis by Frick (1937), Webb (1969); it was recombined as Rakomeryx sinclairi by Skinner et al. (1977), Janis and Manning (1998), Prothero and Liter (2007), Prothero and Liter (2008).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1918 | Cervavus sinclairi Matthew p. 218 fig. 17 |
| 1924 | Blastomeryx sinclairi Matthew |
| 1937 | Rakomeryx gazini Frick |
| 1937 | Rakomeryx jorakianus Frick |
| 1937 | Rakomeryx raki Frick |
| 1937 | Rakomeryx yermonensis Frick |
| 1977 | Rakomeryx sinclairi Skinner et al. |
| 1998 | Rakomeryx sinclairi Janis and Manning |
| 2007 | Rakomeryx sinclairi Prothero and Liter p. 246 |
| 2008 | Rakomeryx sinclairi Prothero and Liter |
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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.
†Rakomeryx sinclairi Matthew 1918
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Invalid names: Rakomeryx gazini Frick 1937 [synonym], Rakomeryx jorakianus Frick 1937 [synonym], Rakomeryx raki Frick 1937 [synonym], Rakomeryx yermonensis Frick 1937 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. D. Matthew 1918 | Size of D. whitfordi and very like it in construction but distinguished by higher crowned and less rugose molars with no trace of paheomeryx fold, metaconid of p4 smaller, less extended anteriorly, heel of ms with its inner cusp wholly or almost wholly behind the posterior wing of the hypoconid crescent. | |
| D. R. Prothero and M. R. Liter 2008 | Horns with less pronounced basal flange, anteriorly
directed, with bases strongly flattened anteroposteriorly, attenuated at tips; shafts strongly bowed laterally, forming concave half-moon shape when viewed from front. Orbits shifted posteriorly over anterior M3. Premolars more reduced than in Dromomeryx, but p4 may lack closure of anterior fossette. Metastylids on upper molars, and large metacone on P4. Limb proportions like that of Drepanomeryx (after Janis and Man- ning, 1998, p. 483). |
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Janis and Manning 1998, Nowak 1999, Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Barstovian to the top of the Hemingfordian or 16.30000 to 15.97000 Ma
Collections (13 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Miocene | USA (California) | Rakomeryx raki (19336 19427) Rakomeryx sinclairi (19426) | |
| Miocene | USA (Oregon) | Rakomeryx sinclairi (18994) | |
| Hemingfordian | USA (Oregon) | Rakomeryx sinclairi (212622 212625 212626 212627) | |
| Barstovian | USA (California) | Rakomeryx raki (19472) Rakomeryx yermonensis (19616) Ruminantia indet. (19162) | |
| Early/Lower Barstovian | USA (Nebraska) | Rakomeryx sinclairi (17995) | |
| Barstovian - Clarendonian | USA (Nebraska) | Cervavus sinclairi (230906) |