Name: Tanycolagreus ‭(‬Long limb hunter‭)‬.
Phonetic: Tan-e-coe-lag-ree-us.
Named By: Carpenter,‭ ‬Miles‭ & ‬Cloward‭ ‬-‭ ‬2005.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Saurischia,‭ ‬Theropoda,‭ ‬Coelurosauria,‭ ‬Tyrannosauroidea,‭ ‬Coeluridae.
Species: T.‭ ‬topwilsoni‭ (‬type‭)‬.
Diet: Carnivore.
Size: About 3.3 meters for the holotype which is a subadult, Fully grown adults probably up to about 4 meters long.
Known locations: USA,‭ ‬Wyoming‭ ‬-‭ ‬Morrison Formation.
Time period: Oxfordian to Tithonian of the Jurassic.
Fossil representation: Incomplete skull,‭ ‬and almost complete post cranial remains,‭ ‬of a sub adult specimen.‭

       Tanycolagreus has been dubbed a run of the mill kind of Jurassic predator.‭ ‬Small and lightweight,‭ ‬Tanycolagreus probably focused its attentions on hunting smaller dinosaurs that were too difficult for larger predators to live on.‭ ‬However the holotype specimen is of a three meter subadult,‭ ‬with further referred material indicating a size approaching at least four meters long.‭ ‬With this in mind it may be that Tanycolagreus was not restricted to hunting just smaller dinosaurs.
       A premaxilla that was originally referred to Stokesosaurus has since been attributed to Tanycolagreus,‭ ‬although some palaeontologists have drawn comparisons between these two dinosaurs with the suggestion that they may be synonymous.‭ ‬Both are of similar size and build,‭ ‬and since the holotype and most complete specimen is of a sub‭ ‬adult,‭ ‬the true adult form may in fact be closer.‭ ‬Also Stokesosaurus is known from incomplete material making proper comparison between it and Tanycolagreus difficult.

Further reading
- Ornitholestes hermanni, a new compsognathoid dinosaur from the Upper Jurassic. Bulletin of the American Museum of Natural History 19(12): 459–464. - Henry Fairfield Osborn - 1903.
- New skeleton of Coelurus fragilis from the Morrison Formation of Wyoming. - Journal of Vertebrate Paleontology 18(3): 64A - C. A. Miles, K. Carpenter & K. C. Cloward - 1998.
- New small theropod from the Upper Jurassic Morrison Formation of Wyoming. The Carnivorous Dinosaurs. - Indiana University Press, Bloomington 23-48 - K. Carpenter, C. A. Miles & K. C. Cloward - 2005.


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