Gobisaurus ‭(‬Gobi lizard‭ ‬-‭ ‬after the Gobi Desert‭)

Short Info

Gobisaurus ‭(‬Gobi lizard‭ ‬-‭ ‬after the Gobi Desert‭)

Phonetic : Go-bee-sore-us.

Named By : Matthew K.‭ ‬Vickaryous,‭ ‬Anthony P.‭ ‬Russell,‭ ‬Philip J.‭ ‬Currie‭ & ‬Xi-Jin Zhao‭ ‬-‭ ‬2001

Diet : Herbivore

Size : Estimated 5 meters long

Type of Dinosaur : Armoured Dinosaur

Type Species : G.‭ ‬domoculus‭ (‬type‭)

Found in : Mongolia‭ ‬-‭ ‬Ulansuhai Formation

When it Lived : Early Cretaceous, 121-99 million years ago

Gobisaurus, an extinct genus is a basal ankylosaurid ankylosaur from the from the Upper Cretaceous (and possibly also Lower Cretaceous) period of China (Nei Mongol Zizhiqu). The genus contains only Gobisaurus dominoculus, and is monotypic.

The Sino-Soviet Expeditions (1959-1960), discovered an ankylosaurian skull in the Gobi Desert in Inner Mongolia, near Moartu. This was in the area of the Alashan Desert. This find was neglected for many years until fossils were chosen to be displayed in a traveling exhibition that toured the globe between 1990-97 as part of the China-Canada Dinosaur Project. Although the postcranial skull could not be found, it was displayed and informally called “Gobisaurus”, which at that time was a nomen nudum.

Matthew K. Vickaryous and Anthony P. Russell along with Zhao Xijin, described and named the type species Gobisaurus domoculus in 2001. Its provenance is indicated by the generic name “Gobi (Desert lizard)”. Its specific Latin name, “hidden from sight”, refers to the fact that it was overlooked for over three decades.

IVPP V12563 was the holotype found in a layer from the Ulansuhai Formation. Although it was believed to be of Aptian age in 2001, later research has shown that it is actually from the Turonian. It includes a skull and unidentified postcranial remains.

Victoria Arbour in 2014 concluded that Zhongyuansaurus (the type specimen, HGM 41HIII0002), which includes extensive postcranial remains was a possible junior synonym for Gobisaurus.

Gobisaurus, a large ankylosaurian, is known. Gregory S. Paul, in 2010, estimated that the skull’s length was six metres and its weight at 3.5 tons. The skull measured 46cm (18in) long and 45cm (18in) wide.

Gobisaurus dominiculus shares many similarities with Shamosaurus. These include a rounded skull, short supraorbital bosses and large elliptical orbital bosses. But the two taxa may be distinguished by differences in the length of the maxillary tooth row (26,6% instead of 40% of total skull length with Gobisaurus), an unfused basipterygoid-pterygoid process in Gobisaurus, the front of the pterygoid being in e vertical position, the presence on an elongate vomerine premaxillary process in Gobisaurus, and the presence of cranial sculpting in Shamosaurus, but not in Gobisaurus. Arbour, however, denied this distinction and concluded that there was about the same amount of sculpting.

The skull measured approximately 23% longer at the external nostrils.

Source: Wikipedia