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Taxonomy
Citellus shotwelli was named by Black (1963).
It was recombined as Otospermophilus shotwelli by Barnosky (1986); it was recombined as Spermophilus shotwelli by Shotwell (1968), Wilson and Reeder (1993) and Korth (1994).
It was recombined as Otospermophilus shotwelli by Barnosky (1986); it was recombined as Spermophilus shotwelli by Shotwell (1968), Wilson and Reeder (1993) and Korth (1994).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1963 | Citellus shotwelli Black |
| 1968 | Spermophilus shotwelli Shotwell |
| 1986 | Otospermophilus shotwelli Barnosky |
| 1993 | Spermophilus shotwelli Wilson and Reeder |
| 1994 | Spermophilus shotwelli Korth |
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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.
†Spermophilus shotwelli Black 1963
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Fernández et al. 2000, Carroll 1988, Hendy et al. 2009, Ji et al. 2002, Lillegraven 1979 | |||||
Age range: base of the Hemphillian to the top of the Miocene or 10.30000 to 5.33300 Ma
Collections (5 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Miocene | Mexico (Chihuahua) | Spermophilus shotwelli (18714) | |
| Hemphillian | USA (Oregon) | Citellus shotwelli (18939 19116) | |
| Late/Upper Hemphillian | USA (Nebraska) | Spermophilus shotwelli (18126 18359) |