(Indian Statistical Institute
Named By: Wilson & Upchurch - 2003.
Synonyms: Titanosaurus colberti.
Classification: Chordata, Reptila, Dinosauria, Sauropodomorpha, Sauropoda, Titanosauria, Antarctosauridae.
Species: I. colberti (type).
Size: Total size uncertain due to incomplete remains, but at least about 14-15 meters long for the holotype individual. Holotype individuals humerus 148 centimetres long, and Ulna 80 centimetres long.
Known locations: India - Lameta Formation.
Time period: Maastrichtian of the Cretaceous.
Fossil representation: Very well preserved with much of the post cranial skeleton known. However, skull and posterior portion of the tail are unknown.
named in 1997 as Titanosaurus colberti by Jain
a new study by Wilson and Upchurch in 2003 saw the fossils
renamed as a new genus, Isisaurus. Isisaurus
was named after the
Indian Statistical Institute and should not be confused with the
goddess Isis from Ancient Egyptian mythology.
Isisaurus was a moderately size titanosaur that roamed India during the late Cretaceous period. Fungal analysis of coprolites attributed to Isisaurus has revealed that Isisaurus probably fed upon a variety of different trees. This would confirm that Isisaurus was a high browser. Isisaurus would have shared its environment with other similar dinosaurs such as Jainosaurus as well as predatory theropods like the abelisaur Rajasaurus which may have posed a serious threat to young juveniles of both of these titanosaurs.
- New Titanosaurid (Dinosauria: Sauropoda) from the Late Cretaceous of Central India - Sohan L. Jain, Saswati Bandyopadhyay - 1997.
- A revision of Titanosaurus Lydekker (Dinosauria – Sauropoda), the first dinosaur genus with a 'Gondwanan' distribution - Jeffrey A. Wilson & Paul Upchurch - 2003.
- Fungi in dinosaurian (Isisaurus) coprolites from the Lameta Formation (Maastrichtian) and its reflection on food habit and environment. - Micropaleontology, 51(1): 73-82. - N. Sharma, R. K. Kar, A. Agarwal & R. Kar - 2005.