During two expeditions, one in 1995 and the other in 1997, numerous remains of abelisaurids were recovered from a single quarry 50 square metres in area.
The collected remains included cervical, dorsal, sacral, and caudal vertebrae, portions of pectoral and pelvic girdles, and several hind limb bones.
Because of the unearthing of seven differently sized right tibiae, it was suggested that the assemblage was formed by at least seven individuals of different ontogenetic stages.
Within the collection were several duplicate bones, such as the ilia, pubes, femora and tibiae, that exhibited similar morphological features of typical abelisauroid traits.
However, despite these remains being of different size gradation and representing growth series, hardly any taxonomic variation was discovered.
It was interpreted by Novas et al.
that the entire theropod collection from this quarry may be referred to the single species Rahiolisaurus.

Individual bones of the newly discovered abelisaurid was given separate catalogue numbers.
The holotype  of Rahiolisaurus is represented by a partial association of pelvic elements and a femur that were found in the field.
It consists of a right ilium (ISIR 550), a right pubis (ISIR 554), and a right femur (ISIR 557).
In addition, an axis (]ISIR 658) was found in articulation with cervicals 3 (ISIR 659) and 4 (ISIR 660) and are attributed to the species.
These bones are currently housed at the collection of the Geology Museum, Indian Statistical Institute, Kolkata.

Rahiolisaurus was named after the village of Rahioli, located near the fossil site where the dinosaurs remains were discovered.
The specific name, gujaratensis, means "from Gujarat" in Latin.
During two expeditions, one in 1995 and the other in 1997, numerous remains of abelisaurids were recovered from a single quarry 50 square metres in area. The collected remains included cervical, dorsal, sacral, and caudal vertebrae, portions of pectoral and pelvic girdles, and several hind limb bones. Because of the unearthing of seven differently sized right tibiae, it was suggested that the assemblage was formed by at least seven individuals of different ontogenetic stages. Within the collection were several duplicate bones, such as the ilia, pubes, femora and tibiae, that exhibited similar morphological features of typical abelisauroid traits. However, despite these remains being of different size gradation and representing growth series, hardly any taxonomic variation was discovered. It was interpreted by Novas et al. that the entire theropod collection from this quarry may be referred to the single species Rahiolisaurus.
Individual bones of the newly discovered abelisaurid was given separate catalogue numbers. The holotype  of Rahiolisaurus is represented by a partial association of pelvic elements and a femur that were found in the field. It consists of a right ilium (ISIR 550), a right pubis (ISIR 554), and a right femur (ISIR 557). In addition, an axis (]ISIR 658) was found in articulation with cervicals 3 (ISIR 659) and 4 (ISIR 660) and are attributed to the species. These bones are currently housed at the collection of the Geology Museum, Indian Statistical Institute, Kolkata.
Rahiolisaurus was named after the village of Rahioli, located near the fossil site where the dinosaurs remains were discovered. The specific name, gujaratensis, means "from Gujarat" in Latin.
Rahiolisaurus