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Desmathyus
Taxonomy
Desmathyus was named by Matthew (1907).
It was synonymized subjectively with Hesperhys by Simpson (1945) and Wright (1998); it was reranked as Hesperhys (Desmathyus) by Gazin and Collins (1950).
It was assigned to Hesperhys by Gazin and Collins (1950); to Tayassuidae by Matthew (1907), Morea (1981) and Carroll (1988); and to Hesperhyinae by Prothero (2015) and Prothero (2021).
It was synonymized subjectively with Hesperhys by Simpson (1945) and Wright (1998); it was reranked as Hesperhys (Desmathyus) by Gazin and Collins (1950).
It was assigned to Hesperhys by Gazin and Collins (1950); to Tayassuidae by Matthew (1907), Morea (1981) and Carroll (1988); and to Hesperhyinae by Prothero (2015) and Prothero (2021).
Species
Synonymy list
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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.
G. †Desmathyus Matthew 1907
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†Desmathyus brachydontus Dalquest and Mooser 1980
†Desmathyus pinensis Matthew 1907
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. R. Prothero 2015 | Smaller hesperhyine with a long narrow rostrum and gracile zygomatic arches and orbital regions, and smaller less robust and in ated cheek teeth (in contrast to Hesperhys); P3 has a large lingual cingulum which may develop a protocone; i1 and i2 are dorsoventrally shallow at the base; narrow but deep plesiochoanal chamber. |
Measurements
No measurements are available
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| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Nowak 1999, Hendy et al. 2009, Lillegraven 1979, Nowak 1991, Carroll 1988 | |||||
Age range: base of the Harrisonian to the top of the Irvingtonian or 24.80000 to 0.30000 Ma
Collections (26 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chattian | USA (California) | D. sp. (11601) | |
| Harrisonian | USA (South Dakota) | D. pinensis (17745 17747 17748 17831) | |
| Hemingfordian | USA (Nevada) | D. pinensis (18961 18962) | |
| Hemingfordian | USA (South Dakota) | D. pinensis (17912) | |
| Langhian | USA (Maryland) | D. sp. (48884) | |
| Clarendonian | USA (Florida) | Catagonus brachydontus (18588) | |
| Tortonian - Zanclean | USA (Florida) | Catagonus brachydontus (18548) | |
| Hemphillian | Costa Rica (Puntarenas) | Protherohyus brachydontus (144596) | |
| Hemphillian | Mexico (Hidalgo) | Catagonus brachydontus (212307) | |
| Hemphillian | Mexico (Zacatecas) | Catagonus brachydontus (212341) | |
| Hemphillian | USA (Florida) | Catagonus brachydontus (18577) | |
| Hemphillian | Mexico (Jalisco) | Catagonus brachydontus (189788 189790) | |
| Hemphillian | Mexico (Guanajuato) | Catagonus brachydontus (18718) | |
| Late/Upper Hemphillian | USA (Oklahoma) | Catagonus brachydontus (18076) | |
| Late/Upper Hemphillian | USA (Florida) | Catagonus brachydontus (18573 18595) | |
| Late/Upper Hemphillian | Mexico (Guanajuato) | Catagonus brachydontus (18713 18740) D. brachydontus (18737) | |
| Blancan | Mexico (Hidalgo) | Catagonus brachydontus (20079) | |
| Irvingtonian | USA (Florida) | Catagonus brachydontus (18500) |