Gasosaurus ‭(‬Gas lizard‭)

Short Info

Gasosaurus ‭(‬Gas lizard‭)

Phonetic : Ga-so-sore-us.

Named By : Z. Dong‭ & ‬Z. Tang‭ ‬-‭ ‬1985

Diet : Carnivore

Size : Estimated 3.5 – 4 meters long

Type of Dinosaur : Small Theropod

Type Species : G.‭ ‬constructus‭ (‬type‭)

Found in : China,‭ ‬Sichuan Province‭ ‬-‭ ‬Lower Shaximiao Formation

When it Lived : Mid Jurassic, 170-160 million years ago

Gasosaurus (simplified Chinese Qi Long; traditional Chinese Qi Long) (/g’aes@’so:r@s/), is a genus tetanuran-theropod. It lived between 171.6 and 161.2 million years ago, during the Jurassic Period. Gasosaurus is an amalgamation of the Greek sauros and English gasoline (sauros), which means “lizard/generic reptile”. G. constructus is the only species currently recognized. This name honors the gasoline company which discovered the Dashanpu fossil quarry, Sichuan Province in China. It is now known as the Lower Shaximiao Formation.

Gasosaurus skeletalIJReid, CC BY 4.0, via Wikimedia Commons

Although they were postcranial, the first and only fossils of the dinosaur, as well as the skull, were found in 1985. This explains the unusual name. It is composed of 4 cervical, 7 dorsal and 5 sacral teeth and 7 caudal verbrae. Dong Zhiming, Tang Zilu and others defined the fossils as the type gasosaurus constructus.


Gasosaurus fossil Bishop MuseumPhlox, CC BY-SA 3.0, via Wikimedia Commons


Gasosaurus, a carnivorous dinosaur with short arms and strong legs, is called a Gasosaurus. It was approximately 3.5 to 4 m (11 to 13 feet) long and weighed in at 150 kg (330 lb). Some estimates place its weight at 400 kilograms (880lb). However, very little information is available.

It is difficult to determine the significance of many features in the holotype (IVPP V7264), based only on published descriptions and images. Based on the presence of a larger pubic peduncle than the ischial, the taxon is a tetanuran. Casts reveal that the lesser trochanter is not elevated above the level the femoral heads. Instead, the proximal portion breaks and the lesser trochanter rises approximately to the mid-level of the head like non-coelurosaurian Tetanurans.

It is also recognized by an amphiplatyan amphiplatyan centrala with incipient weak ventral Keel, dorsals containing amphiplatyan centa, low neural arches, plate-like neural spines and dorsal neural spins lacking expanded bulks. There are five sacral centers and arches that are firmly fused and neural spines not fused.

Source: Wikipedia