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Daphoenodon (Borocyon)
Taxonomy
Borocyon was named by Peterson (1910).
It was synonymized subjectively with Daphoenodon by Hunt (1971), Woodburne et al. (1974), Frailey (1979); it was considered a nomen dubium by Matthew (1918); it was reranked as Daphoenodon (Borocyon) by Hunt (2009).
It was assigned to Daphoenodon by Hunt (2009).
It was synonymized subjectively with Daphoenodon by Hunt (1971), Woodburne et al. (1974), Frailey (1979); it was considered a nomen dubium by Matthew (1918); it was reranked as Daphoenodon (Borocyon) by Hunt (2009).
It was assigned to Daphoenodon by Hunt (2009).
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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.
Subg. †Daphoenodon (Borocyon) Peterson 1910
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†Daphoenodon (Borocyon) neomexicanus Hunt, Jr. 2009
†Daphoenodon (Borocyon) niobrarensis Loomis 1936
†Daphoenodon (Borocyon) robustum Peterson 1910
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. M. Hunt 2009 | The subgenus Borocyon dif- fers from all other New World amphicyonids by its longer distal forelimbs and by propor- tions of the proximal tarsals (figs. 33, 34). Borocyon differs from its sister subgenus Daphoenodon by its longer distal forelimbs and by a ‘‘folded’’ M2, as well as by measurements of the dentition (figs. 17, 18; tables 2, 3). It is distinguished from Amphi- cyon galushai by its unreduced premolars, more sectorial carnassials, reduction and loss of M3, ‘‘folded’’ occlusal surface of M2, differently proportioned proximal tarsals (figs. 33, 34), and longer distal forelimbs with much more elongate paraxonic metapodials (see text for discussion of postcranial anatomy). |
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class, subp = subphylum | |||||
| References: Hunt 1998, Ji et al. 2002, Carroll 1988, Lillegraven 1979, Hendy et al. 2009 | |||||
Age range: base of the Hemingfordian to the top of the Harrisonian or 20.43000 to 18.50000 Ma
Collections (18 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Harrisonian | USA (Nebraska) | Borocyon robustum (17858) | |
| Harrisonian | USA (Oregon) | Daphoeninae indet. (19037) | |
| Harrisonian | USA (New Mexico) | Daphoenodon sp. (17844) | |
| Early/Lower Hemingfordian | USA (Nebraska) | Daphoenodon niobrarensis (17865 17888 167867) Daphoenodon robustum (17881 17944) Daphoenodon sp. (17898 17933 17934 17942 17945 17963) | |
| Early/Lower Hemingfordian | USA (New Mexico) | Daphoenodon robustum (19188) | |
| Early/Lower Hemingfordian | USA (Wyoming) | Daphoenodon sp. (167862) | |
| Early/Lower Hemingfordian | USA (Oregon) | Daphoenodon robustum (167866) | |
| Hemingfordian | USA (Wyoming) | Daphoenodon sp. (17953) |