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Acheroraptor temertyorum
Taxonomy
Acheroraptor temertyorum was named by Evans et al. (2013). Its type specimen is ROM 63777, a maxilla (an almost complete right maxilla, missing only the posterior portion of the jugal ramus and an associated maxillary tooth complete with root), and it is a 3D body fossil. Its type locality is 45 km southwest of Jordan (NCD01), which is in a Maastrichtian terrestrial sandstone in the Hell Creek Formation of Montana.
Synonymy list
| Year | Name and author |
|---|---|
| 2013 | Acheroraptor temertyorum Evans et al. figs. 1-2 |
| 2015 | Acheroraptor temertyorum Currie and Koppelhus p. 626 |
| 2015 | Acheroraptor temertyorum DePalma et al. p. 1 |
| 2016 | Acheroraptor temertyorum Bell and Currie p. 7 |
| 2016 | Acheroraptor temertyorum Goodwin and Evans p. 3 |
| 2019 | Acheroraptor temertyorum Brownstein p. 8 |
| 2020 | Acheroraptor temertyorum Jasinski et al. p. 5 |
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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.
†Acheroraptor temertyorum Evans et al. 2013
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. C. Evans et al. 2013 | Mid-sized dromaeosaurid that differs from other eudromaeosaurs in the following characters: relatively small anterior region of the antorbital fossa (defined as the region between the anterior borders of the antorbital fenestra and the antorbital fossa); maxillary fenestra that almost reaches the ventralmargin of the antorbital fossa and is positioned directly posterior to the promaxillary fenestra; extensive, posteriorly projected postantral wall that is visible laterally through the antorbital fenestra (convergent in Austroraptor ); maxillary dentition with unique configuration of prominent apicobasal ridges on both the labial and lingual surfaces of the tooth. Acheroraptor can be further differentiated from Saurornitholestes in having a relatively longer anterior ramus of the maxilla, a much smaller anterior portion of the antorbital fossa, a more robust jugal ramus of the maxilla below the antorbital fossa, and dentition with posterior denticles that are not strongly hooked apically. |
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Marsh 1875, Holtz et al. 2000 | |||||
Age range: Late/Upper Maastrichtian or 72.20000 to 66.00000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Maastrichtian | USA (South Dakota) | Acheroraptor temertyorum (224484) | |
| Late/Upper Maastrichtian | USA (Montana) | Acheroraptor temertyorum (type locality: 152397) |