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PROSAUROLOPHUS

a plant-eating saurolophine hadrosaurid dinosaur from the Late Cretaceous of Canada.
prosaurolophus
Pronunciation: pro-SOR-o-LOH-fus
Meaning: Before Saurolophus
Author/s: Barnum Brown (1916)
Synonyms: See below
First Discovery: Alberta, Canada
Chart Position: 89

Prosaurolophus maximus

The first remains of Prosaurolophus maximus were discovered by Barnum Brown in the Oldman Formation at Sand Creek, Alberta, in 1915, and although it's now well-represented by at least two dozen individuals of different growth stages, seven of them with skulls, it remains obscure.

Part of the problem lies with the fact that it's a bit, well, boring. It was a hadrosaurid so had a wide, flat, duck-billed snout (which was initially reconstructed way too long) and banks of leaf-decimating teeth. But it's a sign of how unremarkable this critter actually is when a small, solid, triangular crest in front of its eyes and proportionately short upper arms are its most outstanding features.
Etymology
Prosaurolophus is derived from the Greek "pro" (before) and "Saurolophus", named for its presumed ancestral relationship to Saurolophus.
The species epithet, maximus, means "largest" in Latin.
Discovery
The first remains of Prosaurolophus maximus were discovered in the Oldman Formation (Belly River Group), North Fork, Sand Creek, Alberta, Canada, by Barnum Brown in 1915. The holotype (AMNH 5386) is a skull.
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Cretaceous
Stage: Campanian
Age range: 80-73 mya
Stats:
Est. max. length: 8 meters
Est. max. hip height: ?
Est. max. weight: 2 tons
Diet: Herbivore
Synonyms
Prosaurolophus blackfeetensis (Jack Horner, 1992) is based on MOR 454 from West-Side Quarry (MOR TM-041) in the Two Medicine Formation of Glacier County, Montana, USA. It didn't have blackfeet, but was named for the Black Foot Indian tribe on whose land a bunch of them were found, which suggests they lived, or at least died, as a group. However, a 2013 review by McGarrity et al. concluded that a taller face and crest variation is no reason to be erecting new species, so they sank this one as a synonym of Prosaurolophus maximus.
References
• B. Brown (1916) "A new crested trachodont dinosaur, Prosaurolophus maximus".
• J.R. Horner, D.B. Weishampel and C.A. Forster (2004) "Hadrosauridae" in Weishampel, Dodson and Osmólska (2004) "The Dinosauria: Second Edition".
• McGarrity, C. T., Campione N. E. , and Evans D. C. (2013) "Cranial anatomy and variation in Prosaurolophus maximus (Dinosauria: Hadrosauridae)".
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To cite this page:
Atkinson, L. "PROSAUROLOPHUS :: from DinoChecker's dinosaur archive".
›. Web access: 24th Nov 2017.
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