Africa-Press – Lesotho. The stegosaur is one of the most recognisable dinosaurs in the world – you can instantly tell it apart from other species by its signature kite-shaped upright plates. To date, 14 distinct species of stegosaurs have been identified by scientists.
A new species of stegosaur discovered in Asia, albeit a relatively small one, may be the oldest ever found – not only in the region, but possibly in the world, Science Daily has reported.
The new stegosaur, discovered in the village of Laojun in the Chinese municipality of Chongqing, has been measured to be about 2.8 metres from nose to tail.
The scientists named it Bashanosaurus primitivus, referencing the ancient name of the Chinese area where it was found and the Latin word for “first” – primitivus. Among the discovered remains were the bones from the back, shoulder, thigh, feet, and ribs, and even some distinctive armour plates.
Yet, this stegosaur is a bit different from all other Middle Jurassic stegosaurs because it has a smaller and less developed shoulder blade, as well as narrower and thicker bases to its armour plates.
Along with the Chongqing Lizard (Chungkingosaurus) and Huayangosaurus, Bashanosaurus primitivus is one of the earliest-diverging stegosaurs, all of whom were unearthed from the Middle to Late Jurassic Shaximiao Formation in China.
This fact led scientists to suggest that all stegosaurs might have originated in Asia. Stegosaurs are among the most recognisable dinosaurs, mainly due to their distinctive huge back plates and tail spikes.
Fourteen species of stegosaurs have been identified so far, among them the Huayangosaurus (one of the most primitive stegosaurs), Gigantspinosaurus, who has enormous shoulder spines, and Miragaia, famous for its very long neck. Stegosaur remains have been found on every continent, except for Antarctica and Australia.