Coahuilasaurus

The holotype specimen, IGM 6685, is a partial skull. It was originally thought to belong to the same genus as PASAC 1, a large unnamed specimen known as the "Sabinas hadrosaurid", but this referral was later rejected. IGM 6685 was later referred to as a specimen of Kritosaurus. IGM 6685 was later named as a new genus and species of kritosaurin hadrosaurid in 2024. The generic name, Coahuilasaurus, honors the Mexican state of Coahuila, where the fossils were found. The specific name, lipani, honors the Lépai-Ndé or Lipani, a tribe of Apache Native Americans known from the area. == Classification ==

Longrich et al. added Coahuilasaurus to a phylogenetic analysis which found it to be a member of the Kritosaurini, while the Sabinas hadrosaur was found to be a member of Saurolophini. A cladogram adapted from that analysis is shown below: }} == Paleoenvironment ==

The Cerro del Pueblo Formation is the oldest member of the Difunta Group, which is believed to have been deposited in the Campanian. lived in this environment in addition to the above-mentioned ornithomimosaurs. Ornithischians were also common and diverse in the ecosystem, much like the contemporaneous Dinosaur Park, Two Medicine, Kaiparowits, and Kirtland formations. Hadrosaur remains are the most common dinosaur fossil material found in the Cerro del Pueblo, being known from vertebrae, limb bones, jawbones, teeth, and shoulder bones. but most remains have yet to be formally named or described, and additional species may have existed. == See also ==