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Macrogenis crassigenis
Taxonomy
Prosthennops crassigenis was named by Matthew and Gidley (1904) [said to be the genotype by Colbert 1935, but this is actually P. serus according to Skinner et al. 1977, Wright 1998]. Its type specimen is AMNH 10882, a skull, and it is a 3D body fossil.
It was recombined as Macrogenis crassigenis by Wright (1983), Wright (1993) and Wright (1998); it was misspelled as Macrogenis crassigensis by Dutra et al. (2017) and Prothero (2021).
It was recombined as Macrogenis crassigenis by Wright (1983), Wright (1993) and Wright (1998); it was misspelled as Macrogenis crassigensis by Dutra et al. (2017) and Prothero (2021).
Synonymy list
| Year | Name and author |
|---|---|
| 1904 | Prosthennops crassigenis Matthew and Gidley p. 265 figs. 14 and 15 |
| 1983 | Macrogenis crassigenis Wright |
| 1993 | Macrogenis crassigenis Wright |
| 1998 | Macrogenis crassigenis Wright |
| 2017 | Macrogenis crassigensis Dutra et al. p. 355 |
| 2021 | Prosthennops crassigenis Prothero p. 31 |
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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.
†Macrogenis crassigenis Matthew and Gidley 1904
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. D. Matthew and J. W. Gidley 1904 | Premolars much smaller than the molars; p 2 triangular, three-rooted; p 3 and p 4 four-rooted, but not completely
. molariform as indicated by the close approximation of the two inner fangs; the palatines· extend well backward, throwing the posterior nares somewhat behind the glenoid fossre; the bullre are large and occupy a more posterior position than in any species of Tagassu; the ridge on the outer surface of the maxilla is not produced forward as in the modern peccaries, but is short and bifurcated anteriorly by a deep pit. Anterior to this pit is another larger pit in which the infraorbital foramen opens; still another shallower pit of smaller size occupies a position anterior to and somewhat above the large pit. There are also two long, narrow pits or grooves on the upper face of the skull, extending the entire length of the nasals. The sagittal crest is broad. and flat on top. Some of the above specific characters may be of generic value. |
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Carroll 1988, Hendy et al. 2009, Nowak 1991, Nowak 1999 | |||||
Age range: Clarendonian or 12.50000 to 9.40000 Ma
Collections (7 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Clarendonian | USA (South Dakota) | Macrogenis crassigenis (18063) | |
| Clarendonian | USA (Nebraska) | Macrogenis crassigenis (18095 18171 18257 18273 18336) | |
| Clarendonian - Hemphillian | USA (Nebraska) | Macrogenis crassigenis (18134) |