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Daphoenodon (Borocyon) robustum
Taxonomy
Borocyon robustum was named by Peterson (1910) [genotype]. Its type locality is Whistle Creek (Upper), which is in a Harrisonian terrestrial horizon in the Marsland Formation of Nebraska.
It was recombined as Daphoenodon robustum by Hunt (1971), Woodburne et al. (1974) and Frailey (1979); it was considered a nomen dubium by Matthew (1918); it was recombined as Daphoenodon (Borocyon) robustum by Hunt (2009).
It was recombined as Daphoenodon robustum by Hunt (1971), Woodburne et al. (1974) and Frailey (1979); it was considered a nomen dubium by Matthew (1918); it was recombined as Daphoenodon (Borocyon) robustum by Hunt (2009).
Synonymy list
| Year | Name and author |
|---|---|
| 1910 | Borocyon robustum Peterson |
| 1971 | Daphoenodon robustum Hunt |
| 1974 | Daphoenodon robustum Woodburne et al. |
| 1979 | Daphoenodon robustum Frailey |
| 2009 | Daphoenodon (Borocyon) robustum Hunt, Jr. p. 14 figs. 3–8, 15, 21, 22, 24–28, 31, 32, 37–39 |
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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.
†Daphoenodon (Borocyon) robustum Peterson 1910
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. M. Hunt 2009 | Largest known daphoenine amphicyonid, and the largest species of Borocyon, with basilar skull length of 285– 294 mm, differing from B. niobrarensis by larger average body size and dentition (c–m2 length, ,110–120 mm), consistent loss of M3, more elongate forelimbs, and greater modification of proximal tarsals (figs. 33, 34, astragalus-calcaneum) for fore–aft motion (see text for detailed discussion). Distin- guished from B. neomexicanus by much larger body size, dentition (figs. 17, 18; tables 2, 3), and more elongate yet anatom- ically similar distal forelimbs. |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Hendy et al. 2009, Carroll 1988, Ji et al. 2002, Hunt 1998 | |||||
Age range: base of the Early/Lower Hemingfordian to the top of the Harrisonian or 20.43000 to 18.50000 Ma
Collections (12 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Harrisonian | USA (Oregon) | Daphoeninae indet. (19037) | |
| Harrisonian | USA (Nebraska) | Borocyon robustum (type locality: 17858) | |
| Early/Lower Hemingfordian | USA (New Mexico) | Daphoenodon robustum (19188) | |
| Early/Lower Hemingfordian | USA (Oregon) | Daphoenodon robustum (167866) | |
| Early/Lower Hemingfordian | USA (Nebraska) | Daphoenodon robustum (17881 17944) Daphoenodon sp. (17898 17933 17934 17942 17945 17963) |