User:Montanoceratops/sandbox

Pachyrhinosaurus is a genus of Centrosaurine Ceratopsian that lived in North America during the Late Cretaceous

History
*WIP*

Description
Pachyrhinosaurus can be distinguished from Non-Pachyrostran Centrosaurs by the presence of a nasal boss instead of a nasal horn. Further, it can be distinguished from Achelousaurus by the more medially projected, curved P3 epiparietals, more pronounced P1 epiparietals, a shorter, rounder frill, among other features. Further, it can be distinguished from Achelousaurus, the other known Pachyrostran, by, "a relatively broader, longer, and typically thicker boss.", "the nasal rugosity extends posteriorly onto the frontals", and "Supraorbital boss is stouter and less rugose than in Achelousaurus."

P. canadensis is known from the Horsehoe Canyon Formation and the laterally equivalent St. Mary River Formation. It was estimated by to be6 meters long, 2 meters tall, and weigh 3 metric tones. *WIP, add species autapomorphies, ect.*

P. lakustai is known from the Wapiti Formation. It was around 5m long, and weigh 2 metric tons. *WIP, add species autapomorphies, ect.*

P. perotorum is known from the Prince Creek Formation. It was around 5m long, and weigh 2 metric tons *WIP, add species autapomorphies, ect.*

P. "youngi" was found in the Wapiti Formation. Kruk didn't provide estimates on size of P. "youngi", however it can be assumed to be around 5-6m long and weighed 2-3 tons due to it's phylogenetic position. *WIP, add species autapomorphies, ect.*

TMP 2002.76.1 is known from the Dinosaur Park Formation. *WIP, add some info on potential synonymy, ect*

Species

 * P. canadensis (Sternberg, 1950)
 * P. lakustai (Currie, Langston & Tanke, 2008)
 * P. perotorum (Fiorillo & Tykoski, 2012)
 * P. "youngi" (Kruk, 2015, Thesis)
 * P. sp. nov.? TMP 2002.76.1

Phylogeny
This cladogram was recovered by Kruk (2015) in her thesis on P. "youngi".

Horseshoe Canyon Formation/ St. Mary River Formation
*Add ecology*

Wapiti Formation
*Add ecology*

Prince Creek Formation
*Add ecology*

Dinosaur Park Formation
*Add ecology*