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Hypisodontidae
Taxonomy
Hypisodontinae was named as a subfamily. It is not extant.
It was reranked as the family Hypisodontidae by Vislobokova (2001), Korth et al. (2022).
It was assigned to Hypertragulidae by Matthew (1908), Scott (1940), Gazin (1955); to Hypertraguloidea by Vislobokova (2001); and to Artiodactyla by Korth et al. (2022).
It was reranked as the family Hypisodontidae by Vislobokova (2001), Korth et al. (2022).
It was assigned to Hypertragulidae by Matthew (1908), Scott (1940), Gazin (1955); to Hypertraguloidea by Vislobokova (2001); and to Artiodactyla by Korth et al. (2022).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1908 | Hypisodontinae Matthew p. 561 |
| 1940 | Hypisodontinae Scott p. 524 |
| 1955 | Hypisodontinae Gazin p. 44 |
| 2001 | Hypisodontidae Vislobokova p. S136 |
| 2022 | Hypisodontidae Korth et al. |
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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.
Fm. †Hypisodontidae
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G. †Hypisodus Cope 1873
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†Hypisodus alacer Troxell 1920
†Hypisodus ironsi Cook 1934
†Hypisodus minimus Cope 1873
†Hypisodus paululus Cook 1934
†Hypisodus retallacki Meehan and Martin 2004
†Hypisodus ringens Cope 1873
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| I. A. Vislobokova 2001 | Small in size. Skull brachyceph- alic with long and slender rostrum. Orbits large. Postor- bital region anteriorly compressed. Postorbital bar com- plete, formed mostly by frontal. Auditory bullae large, strongly inflated, and meeting mid ventrally. External acoustic meatus medium long. Stylohyoid vagina encroaching upon bulla and enclosed posteriorly. Anterior opening of nasal cavity small. Upper canines large. Ante- rior premolars reduced; the first two of these lost. Radius and ulna fused. Fibula reduced and distally fused with tibia. Central metapodials III and IV closely appressed. |
Measurements
No measurements are available
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| Source: o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988, Nowak 1999, Lillegraven 1979 | |||||
Age range: base of the Chadronian to the top of the Geringian or 37.00000 to 24.70000 Ma
Collections (35 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Chadronian | USA (Wyoming) | Hypisodus sp. (16960 16961 16962 16963 16964 16965) | |
| Chadronian | USA (Nebraska) | Hypisodus minimus (16917 16940 16941 17014) Hypisodus minimus, Hypisodus paululus (16930) | |
| Chadronian | USA (Colorado) | Hypisodus sp. (16977) | |
| Late/Upper Chadronian | USA (Montana) | Hypisodus minimus (17027) | |
| Late/Upper Chadronian - Orellan | USA (Nebraska) | Hypisodus minimus (230806) | |
| Orellan | USA (Colorado) | Hypisodus minimus (17081 17082 17083) | |
| Orellan | USA (South Dakota) | Hypisodus minimus (17102 17174) Hypisodus sp. (17187 17188 17189) | |
| Orellan | USA (Wyoming) | Hypisodus alacer (17117) Hypisodus minimus (17318) | |
| Orellan | USA (Nebraska) | Hypisodus alacer (17059 17297) Hypisodus minimus (17062 17098 17108) | |
| Whitneyan | USA (South Dakota) | Hypisodus sp. (17337 17384) | |
| Whitneyan | USA (Colorado) | Hypisodus minimus (17426) | |
| Whitneyan | USA (Nebraska) | Hypisodus ironsi (17346) Hypisodus retallacki (17391) | |
| Geringian | USA (Nebraska) | Hypisodus sp. (17494) |