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Perognathoides quartus
Taxonomy
Diprionomys quartus was named by Hall (1930). Its type locality is Fish Lake Valley, which is in a Clarendonian terrestrial horizon in the Esmeralda Formation of Nevada. It is the type species of Perognathoides.
It was recombined as Perognathoides quartus by Wood (1935), Wilson (1939), Clark et al. (1964); it was recombined as Cupidinimus quartus by Korth (1979), Whistler (1984), Barnosky (1986), Korth (1997).
It was recombined as Perognathoides quartus by Wood (1935), Wilson (1939), Clark et al. (1964); it was recombined as Cupidinimus quartus by Korth (1979), Whistler (1984), Barnosky (1986), Korth (1997).
Entered
by J. Alroy on 2003-01-23; modified by J. Alroy on 2013-04-30
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Diprionomys quartus Hall |
| 1935 | Perognathoides quartus Wood p. 93 figs. Figures 9 and 10 |
| 1939 | Perognathoides quartus Wilson |
| 1964 | Perognathoides quartus Clark et al. |
| 1979 | Cupidinimus quartus Korth |
| 1984 | Cupidinimus quartus Whistler |
| 1986 | Cupidinimus quartus Barnosky |
| 1997 | Cupidinimus quartus 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.
†Perognathoides quartus Hall 1930
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. E. Wood 1935 | Size large; P4 with protostyle and buccal style; teeth less hypsodont than in the other known species; Pf subequal to Mi; little reduction of Mf; P4 becomes circular when worn; infraorbital foramen far forward. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1991, Lillegraven 1979, Hendy et al. 2009, Ji et al. 2002, Carroll 1988 | |||||
Age range: Clarendonian or 12.50000 to 9.40000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Clarendonian | USA (Nevada) | Perognathoides quartus (18845 type locality: 18888) |