Byronosaurus

Taxobox|
name = "Byronosaurus"
status = fossil


image_width = 200px
image_caption = "Byronosaurus" skull.
regnum = Animalia
phylum = Chordata
classis = Sauropsida
superordo = Dinosauria
ordo = Saurischia
subordo = Theropoda
infraordo = Coelurosauria
familia = Troodontidae
genus = "Byronosaurus"
species = "B. jaffei"
binomial = "Byronosaurus jaffei"
binomial_authority = Norell, Makovicky & Clark, 2000

"Byronosaurus" was a troodontid dinosaur which lived during the Late Cretaceous Period. It was named for Byron Jaffe, "in recognition of his family's support for the Mongolian Academy of Sciences-American Museum of Natural History Paleontological Expeditions." The first example of "Byronosaurus" was discovered in 1993 at Ukhaa Tolgod, Gobi Desert, Mongolia; a second was found in 1996 at Bolor's Hill, about 8 kilometers away (5 miles).

"Byronosaurus" was a small, agile dinosaur that was probably only 1.5 meters long (5 ft) and 50 centimeters high (17 in).Montague, R. (2006) " [http://apt.allenpress.com/perlserv/?request=get-abstract&doi=10.1043%2F0098-4590%282006%29069%5B0243%3AEOBSAG%5D2.0.CO%3B2 Estimates of body size and geological time of origin for 612 dinosaur genera (Saurischia, Ornithischia)] ". "Florida Scientist" 69(4):243–257] It weighed only about 4 kilograms (9 lbs). Unlike most other troodontids, its teeth seem to lack serrations. They are instead needle-like, probably best suited for catching small birds, lizards and mammals. Specifically, they resemble those of "Archaeopteryx", the bird-like dinosaur.

The remains of two individuals have been found, including two skulls. One, measuring 23 centimeters long (8 inches), is better preserved than any other troödontid skull found to date. It has a chamber in the snout where air enters from the nostrils before passing through to the mouth - another feature similar to that found in birds.

References

*Makovicky, P.J., Norell, M.A., Clark, J.M., and Rowe, T.E. (2003). [http://fm1.fieldmuseum.org/aa/Files/pmakovicky/Makovicky_et_al_2003.pdf Osteology and relationships of "Byronosaurus jaffei" (Theropoda: Troodontidae).] "American Museum Novitates" 3402:1-32.
* [http://www.dinosauria.com/dml/names/dinob.htm Dinosauria.com]