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Miospermophilus bryanti
Taxonomy
Palaearctomys bryanti was named by Wilson (1960). Its type specimen is KUMVP 10149, a mandible (incomplete right lower jaw with p4, m2-m3), and it is a 3D body fossil.
It was recombined as Miospermophilus bryanti by Black (1963), Korth and Kron (2020).
It was recombined as Miospermophilus bryanti by Black (1963), Korth and Kron (2020).
Entered
by J. Alroy on 2003-01-23; modified by J. Marcot on 2026-05-03
Synonymy list
| Year | Name and author |
|---|---|
| 1960 | Palaeoarctomys bryanti Wilson p. 57 figs. FIgure 60 - 62, 67 |
| 1963 | Miospermophilus bryanti Black p. 187 figs. Plate 16 |
| 2020 | Miospermophilus bryanti Korth and Kron pp. 307 - 308 figs. Figs. 6E–F; Table 7 |
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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.
†Miospermophilus bryanti Wilson 1960
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. W. Wilson 1960 | Size small (alveolar length 134-M3, 7.1-7.5); essentially brachydont cheek-teeth; cheek dentition rela- tively light; protoloph and metaloph of upper molars convergent to protocone, metaconule absent as a discrete cusp; lower incisor compressed with multiple, longi- tudinal grooves; P 4 small, relatively short and broad; lower molars with entoconids weak to absent; inner half of M 2 notably shorter than outer half; lower jaw rela- tively heavy and diastema short, with rather shallow diastemal depression; angular process short, rather bluntly terminated, only moderately twisted inwardly. | |
| C. C. Black 1963 | Smaller than M. wyomingensis; diastemal region of mandible long; diastemal depression shallow; metaloph not as constricted as in that species; lophs low; metaconules small; protocone large; entoconid not completely submerged in posterolophid. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Ji et al. 2002, Lillegraven 1979, Carroll 1988, Hendy et al. 2009, Nowak 1991 | |||||
Age range: base of the Hemingfordian to the top of the Early/Lower Barstovian or 18.50000 to 12.50000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Hemingfordian | USA (Colorado) | Palaeoarctomys bryanti (17965) | |
| Early/Lower Barstovian | USA (Nebraska) | Miospermophilus bryanti (17976) |