All specimens attributed to Gandheralophus represent partial dentaries and lower jaws, and came from the Ypresian stage of the upper part of the upper Ghazij Formation.

Over 200 specimens attributed to this genus have been recovered from these and other beds of the Yixian, the age of which is the subject of much debate.

One specimen attributed to O. velox from the Kaiparowitz Formation of Utah, was described in 1985.

The first named specimen now attributed to Triceratops is a pair of brow horns attached to a skull roof, found near Denver, Colorado in the spring of 1887.

An interfrontal bone is seen in material once referred to Brachystelechus but not in any material known from specimens previously attributed to Batropetes.

Only a single specimen attributed to this species, collected in 1868, is known from Madagascar.

The Buffalo Museum of Science in Buffalo, New York also holds a collection of specimens attributed to a collector identified as "Blytt", who is likely Axel Blytt.

Marsh had previously named a specimen now attributed to I. dispar as Graculavus anceps.