Dromaeosaurinae: Difference between revisions
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All North American and Asian dromaeosaurines from [[Late Cretaceous]] were generally small, no more than 1.8 metres long, in ''[[Dromaeosaurus]]'' and ''[[Adasaurus]]''. However, among the dromaeosaurines were the largest dromaeosaurs ever; ''[[Achillobator]]'' was 6 metres long, and ''[[Utahraptor]]'' 7.5. |
All North American and Asian dromaeosaurines from [[Late Cretaceous]] were generally small, no more than 1.8 metres long, in ''[[Dromaeosaurus]]'' and ''[[Adasaurus]]''. However, among the dromaeosaurines were the largest dromaeosaurs ever; ''[[Achillobator]]'' was 6 metres long, and ''[[Utahraptor]]'' 7.5. |
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==Classification and Phylogeny== |
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Dromaeosaurines are distinguished from other dromaeosaurids in having stouter, box-shaped skulls, as opposed to the other subfamilies, which generally have narrower snouts. Also, dromaeosaurines are generally more heavily-built, than the other members of their family, with thick, heavy-set legs, which were designed more for strength, rather than for speed. |
Dromaeosaurines are distinguished from other dromaeosaurids in having stouter, box-shaped skulls, as opposed to the other subfamilies, which generally have narrower snouts. Also, dromaeosaurines are generally more heavily-built, than the other members of their family, with thick, heavy-set legs, which were designed more for strength, rather than for speed. |
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Most dromaeosaurines lived during the Cretaceous period, from the [[Barremian]] to the [[Maastrichtian]] stages. However, as stated previously, at least one taxon must have lived much earlier, during the Jurassic Period. |
Most dromaeosaurines lived during the Cretaceous period, from the [[Barremian]] to the [[Maastrichtian]] stages. However, as stated previously, at least one taxon must have lived much earlier, during the Jurassic Period. |
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The cladogram below follows a 2012 analysis by paleontologists Phil Senter, James I. Kirkland, Donald D. DeBlieux, Scott Madsen and Natalie Toth.<ref name=Yurgovuchia>{{cite doi|10.1371/journal.pone.0036790}}</ref> |
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{{clade| style=font-size:90%;line-height:90% |
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|label1=''[[Eudromaeosauria]]'' |
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|1={{clade |
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|1={{clade |
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|1=''[[Bambiraptor]]'' }} |
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|2={{clade |
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|label1=[[Velociraptorinae]] |
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|1={{clade |
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|1=''[[Adasaurus]]'' |
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|2={{clade |
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|1=''[[Tsaagan]]'' |
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|2=''[[Velociraptor]]'' }} }} |
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|label2=[[Dromaeosaurinae]] |
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|2={{clade |
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|1=''[[Deinonychus]]'' |
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|2={{clade |
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|1=''[[Achillobator]]'' |
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|2=''[[Dromaeosaurus]]'' |
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|3=''[[Utahraptor]]'' |
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|4=''[[Yurgovuchia]]'' }} }} }} }} }} |
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==References== |
==References== |
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Revision as of 17:49, 24 August 2013
| Dromaeosaurines | |
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| Artist's restoration of Utahraptor ostrommaysorum | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Family: | †Dromaeosauridae |
| Clade: | †Eudromaeosauria |
| Subfamily: | †Dromaeosaurinae Matthew & Brown, 1922 |
| Type species | |
| Dromaeosaurus albertensis Matthew & Brown, 1922
| |
| Genera | |
Dromaeosaurinae is a subfamily of Dromaeosauridae. Most dromaeosaurines lived in what is now the US and Canada, (Dromaeosaurus, Utahraptor), as well as Mongolia, (Achillobator, Adasaurus), and possibly Denmark, (Dromaeosauroides), as well. Isolated teeth that may belong to African dromaeosaurines have also been discovered in Ethiopia. These teeth date to the Tithonian stage, of the Late Jurassic Period.[1]
All North American and Asian dromaeosaurines from Late Cretaceous were generally small, no more than 1.8 metres long, in Dromaeosaurus and Adasaurus. However, among the dromaeosaurines were the largest dromaeosaurs ever; Achillobator was 6 metres long, and Utahraptor 7.5.
Classification and Phylogeny
Dromaeosaurines are distinguished from other dromaeosaurids in having stouter, box-shaped skulls, as opposed to the other subfamilies, which generally have narrower snouts. Also, dromaeosaurines are generally more heavily-built, than the other members of their family, with thick, heavy-set legs, which were designed more for strength, rather than for speed.
Also, dromaeosaurines are distinguished from velociraptorines, in having a low DSDI ratio; i.e., their teeth have equal-sized serrations, on both the posterior and on the anterior edges. By contrast, velociraptorines often have larger serrations on the posterior side of the tooth, than the anterior, or no serrations on the anterior side at all.
Most dromaeosaurines lived during the Cretaceous period, from the Barremian to the Maastrichtian stages. However, as stated previously, at least one taxon must have lived much earlier, during the Jurassic Period.
The cladogram below follows a 2012 analysis by paleontologists Phil Senter, James I. Kirkland, Donald D. DeBlieux, Scott Madsen and Natalie Toth.[2]
References
- ^ Goodwin, Clemens, Hutchinson, Wood, Zavada, Kemp, Duffin and Schaff (1999). "Mesozoic continental vertebrates with associated palynostratigraphic dates from the northwestern Ethiopian Plateau." Journal of Vertebrate Paleontology, 19(4): 728-741.
- ^ Attention: This template ({{cite doi}}) is deprecated. To cite the publication identified by doi:10.1371/journal.pone.0036790, please use {{cite journal}} (if it was published in a bona fide academic journal, otherwise {{cite report}} with
|doi=10.1371/journal.pone.0036790instead.
External links
