Ferganasaurus (meaning "Fergana Valley lizard") was a genus of dinosaur first formally described in 2003 by Alifanov and Averianov. The type species is Ferganasaurus verzilini. It was a sauropod similar to Rhoetosaurus. Ferganasaurus is known exclusively from the Balabansai Formation of Kyrgyzstan, which dates to the Callovian stage of the Middle Jurassic.^[1]

Quick Facts Scientific classification, Binomial name ...

Ferganasaurus Temporal range: Middle Jurassic, Callovian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	†Sauropodomorpha
Clade:	†Sauropoda
Genus:	†Ferganasaurus Alifanov & Averianov, 2003
Species:	†F. verzilini
Binomial name
†Ferganasaurus verzilini Alifanov & Averianov, 2003

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The holotype, PIN N 3042/1 (two dorsal and sixteen caudal vertebrae, a pelvis and limb bones), was discovered in 1966 by Kurzanov and Rhozdestvensky in Middle Jurassic (Callovian)-aged rocks from the Balabansai Formation, Kyrgyzstan, but it was subsequently lost with only drawings of the holotype remaining. A 2000 expedition into the Balabansai Formaiton yielded a second specimen of Ferganasaurus, but despite this new material, and the drawings of the originals, no cranial material has ever been attributed to Ferganasaurus. In 2003, the species Freganasaurus verzilini was described by Alifanov & Averianov.^[1]

Ferganasaurus grew up to 18 metres (59 ft) long with an estimated body mass of 15 tonnes (33,000 lb).^[2]