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TEIHIVENATOR

a dubious meat-eating tyrannosauroid theropod dinosaur from the Late Cretaceous of North America.
Pronunciation: TAY-hi-vuh-NAY-tuhr
Meaning: Strong hunter
Author/s: Chan-gyu Yun (2017)
Synonyms: See below
First Discovery: New Jersey, USA
Chart Position: 803

Teihivenator macropus

The remains of Teihivenator were initially assigned to the "ostrich mimic" Coelosaurus antiquus by Joseph Leidy in 1865, but Edward Drinker Cope snaffled them to bolster the ranks of his Laelaps with another species—Laelaps macropus—in 1868, because they were much too big to belong to Coelosaurus. As it turns out, Carl Ludwig Koch has already gifted the name Laelaps to a type of mite—Laelaps agilis—thirty years earlier, so Othniel Charles Marsh announced Dryptosaurus as a replacement in 1877 (in a footnote of an article describing Titanosaurus montanus which was itself pre-occupied and eventually renamed Atlantosaurus), much to Cope's chagrin. However, Oliver Perry Hay was the first to publish all known "Laelaps" species under the new generic name Dryptosaurus, including Dryptosaurus macropus, in 1902, though Mathew and Brown (1922) reckoned it should've stayed with Leidy's Coelosaurus antiquus. By the by, in 1979 Donald Baird and Jack Horner realised the name Coelosaurus was pre-occupied too, by the battered vertebra of an unknown critter of an uncertain age from somewhere in New Jersey, that was named in 1854 by an anonymous author who turned out to be Professor Richard Owen.

In 2017, Chan-gyu Yun restudied the fossils of "Dryptosaurus" macropus, and realised they belonged to a tyrannosauroid, just like Thomas Holtz had suggested way back in 2004, but they were less dubious than previously thought. Apparently, "Dryptosaurus" macropus differs from "Coelosaurus" antiquis in features of its partial tibia and in having much more robust toes, and from Dryptosaurus aquilunguis, which is also a tyrannosauroid, in features of its partial tibia and in being of a smaller size. Those differences are as much as could be hoped for, given its scant remains, and warranted awarding "Dryptosaurus" macropus a spangly new name—Teihivenator macropus. However, the author didn't bother with a phylogenetic analysis to determine its affinities "due to the obvious lack of character data". Nor did he he make physical copies of his paper available or provide evidence that it was registered with Zoobank, either of which would have satisfied the ICZN's rules of official publication, and perhaps it's just as well...

Less than a week after Teihivenator was shunted into the limelight, Chase Brownstein examined its fossils and concluded that it was a chimaera. The toes belong to a derived ornithomimid, a partial tibia to a hitherto unknown species of tyrannosauroid, and a couple of foot bones could be either or. While this is bad news for Teihivenator, it confirms the presence of an "ostrich mimic" and a "tyrant lizard" that isn't Dryptosaurus or Appalachiosaurus in Appalacia, but there isn't enough of them to justify coining more dinosaur names, just yet.
(Strong hunter with long feet)Etymology
Teihivenator is derived from the Arapaho native "Teihiihan" (strong) and the Latin "venator" (hunter). The name is an odd one for a few reasons, not least because the Arapaho historically lived on the plains of Colorado and Wyoming while Teihivenator was discovered in New Jersey. The author states that the suffix "venator" is Greek too, when it's actually Latin, and he also chopped the prefix "Teihiihan" down to "Teihi" which may have butchered the meaning somewhat. Perhaps a more suitable name for this small, speedy, carnivorous critter would have been Teihiihanvenator or, better still, simply Teihiihan. In Native American folklore, the Teihiihan (aka Hecesiiteihii) are aggresive, cannabalistic, swift-running dwarves who leave their hearts in a drawer at home when they go hunting, and are great enemies of the Arapaho. The species epithet, macropus, is derived from the Ancient Greek "makros" (long) and "pous" (foot), referring to the size of its toes. Macropus is also a genus of marsupial that includes all terrestrial kangaroos, wallaroos, and several species of wallaby, but no-one knows if Cope had these in mind when he coined the name way back in 1868.
Synonyms
Laelaps macropus (Cope, 1868)
Dryptosaurus macropus (Hay 1902)
Discovery
The remains of Teihivenator were discovered in the Navesink Formation, Monmouth County, New Jersey, USA. The holotype (AMNH 2550, 2551, 2552, 2553) includes a partial shin, three finger bones and two metatarsals.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Campanian-Maastrichtian
Age range: 84-66 mya
Stats:
Est. max. length: ?
Est. max. hip height: ?
Est. max. weight: ?
Diet: Carnivore
References
• Koch KL (1838) "Deutschlands Crustaceen, Myriapoden und Arachniden. Ein Beitrag zur deutschen Fauna [Germany's crustaceans, myriapods and arachnids. A contribution to the German fauna". No.22. Regensburg: Friedrich Pustet.
• Leidy J (1865) "Memoir on the extinct reptiles of the Cretaceous formations of the United States". "Smithsonian contributions to knowledge". Volume 14.
• Cope ED (1866) "Discovery of a gigantic dinosaur in the Cretaceous of New Jersey". Proceedings of the Academy of Natural Sciences of Philadelphia, 18: 275-279. [coins Laelaps.]
• Cope ED (1868) "On the genus Laelaps". The American Journal of Science, 2(46): 415-417.
• Marsh OC (1877) "Notice of a New and Gigantic Dinosaur". Amer. Jour. of Sci. and Arts, Vol. XIX, July, I877, p. 88). [renames Laelaps into Dryptosaurus.]
• Hay OP (1902) "Bibliography and Catalogue of the Fossil Vertebrata of North America". Bulletin of the United States Geological Survey, 179: 1-868.
• Mathew WD and Brown B (1922) "The family Deinodontidae, with notice of a new genus from the Cretaceous of Alberta". Bulletin of the AMNH, volume 46, article 6.
• Baird D and Horner J (1979) "Cretaceous dinosaurs of North Carolina". Brimleyana 2: 1-28.
• Chan-gyu Yun (2017) "Teihivenator gen. nov., A new generic name for the Tyrannosauroid Dinosaur "Laelaps" Macropus (Cope, 1868; preoccupied by Koch, 1836)". Journal of Zoological and Bioscience Research, 4(2): 7-13.
• Brownstein CD (2017) "Theropod specimens from the Navesink Formation and their implications for the Diversity and Biogeography of Ornithomimosaurs and Tyrannosauroids on Appalachia". PeerJ Preprints 5:e3105v1 https://doi.org/10.7287/peerj.preprints.3105v1.
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To cite this page:
Atkinson, L. "TEIHIVENATOR :: from DinoChecker's dinosaur archive".
›. Web access: 21st Sep 2017.
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