- This article is about the tyrannosaur. For the Dinopedia user, see user:Lythronax.
Temporal range: Late Cretaceous
An artist's restoration of Lythronax Scientific classification Kingdom: Animalia Phylum: Chordata Class: Sauropsida Suborder: Theropoda Genus: †Lythronax
Loewen et al., 2013
Species: L. argestes Binomial name Lythronax argestes
Loewen et al., 2013
Lythronax is an extinct genus of tyrannosaurid theropod dinosaur which lived around 80 to 78 million years ago in what is now southern Utah. The generic name is derived from the Greek words lythron meaning "gore" and anax meaning "king". Lythronax was a large sized, moderately-built, ground-dwelling, bipedal carnivore, that could grow up to an estimated 9 m (30 ft) in length and weighed 2.5 tonnes (5,500 lb).
L. argestes is the oldest known tyrannosaurid, based on its stratigraphic position. It is known from a specimen thought to be from a single adult that consists of a mostly complete skull, both pubic bones, a tibia, fibula, and metatarsal II and IV from the left hindlimb, as well as an assortment of other bones. Its skull anatomy indicates that, like Tyrannosaurus, Lythronax had both eyes facing the front, giving it depth perception and like Tyrannosaurus, it possibly had binocular vision and extremely good senses of smell, hearing and night vision.
Its genus name comes from the Greek words ''lythron'' meaning "gore" and ''anax'' meaning "king". The species name is the Greek ἀργεστής, "clearing", used by the ancient poet Homer.
Lythronax was a fairly medium to large tyrannosaur, growing up to 9 metres (30 feet) long from nose to tail and standing over 2 metres tall. It was about the weight of a large crocodile which is around 1-2 tons. It had typical tyrannosauroid features such as the large head, large teeth, small, almost useless arms, the classic ''s'' feature commonly found in theropods, forward facing eyes and long heavy tail to balance it while it was running and walking. It probably had a very strong bite which is common with tyrannosaurs so its bite might have been similar in force to the American alligator. It was definitely a carnivore from the shape of its teeth. This particular species would not have been a bone crusher like T. rex but a species that was adept at taking huge chunks out of its prey and waiting for it to die of blood loss like modern day wolves.
In Popular Culture Edit
Lythronax made a debut in Fossil Fighters Frontier.