| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Hypsiops
Taxonomy
Hypsiops was named by Schultz and Falkenbach (1950). Its type is Ticholeptus brachymelis.
It was assigned to Phenacocoelinae by Schultz and Falkenbach (1950) and Stevens et al. (1969); to Merycoidodontidae by Lander (1998); and to Merycochoerinae by Stevens and Stevens (2007) and Stevens et al. (2023).
It was assigned to Phenacocoelinae by Schultz and Falkenbach (1950) and Stevens et al. (1969); to Merycoidodontidae by Lander (1998); and to Merycochoerinae by Stevens and Stevens (2007) and Stevens et al. (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1950 | Hypsiops Schultz and Falkenbach p. 113 figs. 4-7, 9, 11, 12-15 |
| 1969 | Hypsiops Stevens et al. p. 26 |
| 1998 | Hypsiops Lander |
| 2007 | Hypsiops Stevens and Stevens p. 160 |
| 2023 | Hypsiops Stevens et al. p. 81 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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. †Hypsiops Schultz and Falkenbach 1950
show all | hide all
†Hypsiops brachymelis Douglass 1907
hide
Invalid names: Ticholeptus breviceps Douglass 1907 [synonym], Ticholeptus petersoni Loomis 1923 [synonym]
†Hypsiops rooneyi Schultz and Falkenbach 1950
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| C. B. Schultz and C. H. Falkenbach 1950 | SKULL: Size medium, basal lengths ranging from 199 to 265 mm., widths from 111 to 161 mm.; mesocephalic to brachycephalic; high; supraoccipital wings widely spread and protruding posteriorly, notched on sides; supra- occipital wings not fan shaped as in Brachycrus, Merycochoerus, Ustatochoerus, Ticholeptus, and Merychyus (Metoreodon), similar to Phenacocoelus, but with less lateral spread; deep pit on each side of medial line in exoccipital above base of paroccipital process; sagittal crest moderately prominent, higher than in examples of Phenacocoelus; braincase inflated, narrow posteriorly; frontals moderately wide above orbits, laterally rounded as in Phenacocoelus, nasals moderately robust, with anterior retraction; supraorbital foramen with slight to moderately prominent groove extending anteriorly; orbit oblong vertically in outline; zygomatic arch moderately light; zygomatic arch with slight notch (or inward curve) on external surface below and posterior to orbit; malar moderately deep to deep below orbit with an angular pro- tuberance on anterior, inferior border (less prominent than in Submerycockoerus); lacrimal fossa large and deep (similar to ex- amples of Phenacocoelus); facial vacuity present (see following discussion); small depressed area above premolar region; pre- maxillae joined for short distance; occipital condyle of moderate size; paroccipital process wide at base with a marked tapering to a flattened tip; bulla inflated but semi-depressed (more so than in examples of Phenacocoelus, less so than in Pseudomesoreodon); postglenoid process moderately high and robust; posterior palate projecting posteriorly beyond M3 for a greater distance than in Phenacocoelus.
MANDIBLE: Moderately heavy; postsymphysis usually below Pa; ramus moderately shallow for height of skull, increasing gradually in depth from symphysis to point below Ma, with gradual downward and inward curve extending posteriorly from Ma; condyle set approximately at right angle to axis of dental series with slight downward in- ternal slope (latter not so great as in Phenacocoelus). DENTITIONB:rachyodont to subhypsodont (slightly longer crowned than in examples of Phenacocoelus); external styles of superior molars moderately prominent, premolars slightly crowded; C/ and P1 large; P 1 and P 2 usually set at slight angle to alveolar border; pi_pa usually with anterior intermediate crest. LIMBS:Moderately light, but less so than in Merychyus; approximately equal in length to, to longer than in, Phenacocoelus, and somewhat lighter. | |
| M. S. Stevens et al. 2023 | Small mercycochoerines with flat dorsal profiles, deep malars that make the front of the snout high and narrow, slight nasal incision (to the level of P2-3), small facial vacuity, infraorbital foramen above the level of P4, a slightly fan-shaped occipital region, and a large but compressed auditory bulla. Unlike more advanced merycochoerines, Hypsiops has deeply pocketed and round lacrimal fossa |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|
||||
| Source: f = family, o = order, subc = subclass, c = class, subp = subphylum | |||||
| References: Lillegraven 1979, Nowak 1999, Lander 1998, Carroll 1988, Hendy et al. 2009 | |||||
Age range: Harrisonian or 24.80000 to 18.50000 Ma
Collections (11 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Arikareean | USA (Oregon) | H. sp. (93080) | |
| Arikareean | USA (Wyoming) | H. sp. (18927) | |
| Chattian | USA (Oregon) | H. sp. (17603 93079) | |
| Monroecreekian - Harrisonian | USA (Oregon) | H. sp. (17528) | |
| Harrisonian | USA (Nebraska) | H. brachymelis (17757) | |
| Harrisonian | USA (Montana) | H. brachymelis (17810) H. brachymelis, Pseudomesoreodon rooneyi (17787) Ticholeptus breviceps (17861) | |
| Harrisonian | USA (Wyoming) | Ticholeptus petersoni (17853) | |
| Early/Lower Hemingfordian | USA (Oregon) | H. breviceps (17925) |