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Suskityrannus hazelae
Taxonomy
Suskityrannus hazelae was named by Nesbitt et al. (2019). Its type specimen is MSM P4754, a partial skeleton, and it is a 3D body fossil. Its type locality is Mirror Mesa (MSM Loc. 98-67), which is in a Turonian delta plain horizon in the Moreno Hill Formation of New Mexico.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Suskityrannus hazelae Nesbitt et al. p. 892–893 fig. 1–2 |
| 2022 | Suskityrannus hazelae Krumenacker et al. p. 1336 |
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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.
†Suskityrannus hazelae Nesbitt et al. 2019
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| S. J. Nesbitt et al. 2019 | Tyrannosauroid theropod with the following autapomorphies among tyrannosauroids: (1) distal condyles of femur strongly mediolaterally compressed with crista tibiofibularis that merges smoothly into the lateral condyle laterally (in Guanlong, Dilong, Juratyrant, Xiongguanlong, Dryptosaurus, Appalachiosaurus and tyrannosaurids, the distal condyles are more bulbous and wider mediolaterally, and where well preserved, the crista tibiofibularis is offset from the lateral edge of the lateral condyle by a notch); and (2) medial condyle of proximal end of tibia hooked posteromedially (in Guanlong, Juratyrant, Xiongguanlong, Eotyrannus, Dryptosaurus, Appalachiosaurus and tyrannosaurids, the medial condyle projects straight posteriorly).
As both autapomorphies are present on the paratype specimen only, we also note that the holotype of S. hazelae can be distinguished from all other coelurosaurs, including other tyrannosauroids, by a unique combination of characters: D-shaped, incisiform and carinate premaxillary teeth; anteroposteriorly shortened premaxilla (<10% anteroposterior length of maxilla); maxilla main body maintaining constant depth across its length; surangular with dorsoventrally thick lateral shelf and small foramen; cervical vertebrae neural arches X-shaped in dorsal view with anteroposteriorly short neural spine; arctometatarsalian pes (see Supplementary Information for differential diagnosis). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| References: Benton 1983, Marsh 1875 | |||||
Age range: Middle Turonian or 93.50000 to 89.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Turonian | USA (New Mexico) | Dromaeosauridae indet. (type locality: 52360) |