Isisaurus ‭(‬Indian Statistical Institute lizard‭)

Short Info

Isisaurus ‭(‬Indian Statistical Institute lizard‭)

Phonetic : I-si-sore-us.

Named By : Wilson‭ & ‬Upchurch‭ ‬-‭ ‬2003

Diet : Herbivore

Size : Estimated 14 – 16 meters long

Type of Dinosaur : Sauropod

Type Species : I.‭ ‬colberti‭ (‬type‭)‬

Found in : India – Lameta Formation

When it Lived : Late Cretaceous, 71-65 million years ago

Isisaurus, named after the Indian Statistical Institute, is a genus consisting of titanosaurian dinosaurs from the Late Cretaceous period. It is located in what is now India.

Isisaurus colberti’s type specimen, ISI R 331/65, was first described by Sohan Lal Jain in 1997 and named Titanosaurus colberti in 1997. This name was in honour of Edwin Harris Colbert. However, Wilson and Upchurch placed it in its own genus in 2003. “Isi” refers to the Indian Statistical Institute. It was distinguished from other sauropods by its short neck and long forelimbs. The length of the humerus measures 148 cm. This specimen shows that Isisaurus grew to approximately 18 meters (59 feet) in length, and weighed around 14,000 kilograms (14 short tons; 15 long tons). [citation needed]

Isisaurus’ remains are more complete than those of most titanosaurs. It is now known that most of its postcranial skullleton is complete. Jain and Bandyopadhyay discovered skeletal material between 1984 and 1986. It was in an “associated and mostly articulated condition”. This included cervical, dorsal and sacral vertebrae. However, skull, hindlimb, and foot bones were missing. Dongargaon Hill is the site. It is located in the Maastrichtian crevasse, splay claystone of India’s Lameta Formation. Dongargaon Hill (20.212318N,79.090709E) is located near Warora, in Chandrapur District, Maharashtra.

Two types of sauropod skulls were found in the Maastrichtian, India. The first is from Jainosaurus while the second is from Isisaurus. Jainosaurus’ skull was a flat and broad one, but the Isisaurus skull was compact and strong. The angle between the occipital bone (and occipital condyle) is also different between the two taxa. It is 120deg in the Dongargaon specimen. Although the cranium from Isisaurus is similar to that of Apatosaurus and Diplodocus (genera of the Diplodocidae), the bone modifications are quite different.

Source: Wikipedia