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Showing results for tags 'lambeosaurinae'.
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A new small duckbilled dinosaur from Morocco, Couche III
Oxytropidoceras posted a topic in Fossil News
Paleontologists make incredible dinosaur claim after 'perplexing' discovery By Holly Bishop, February 21, 2024 The open access paper is: Longrich, N.R., Pereda-Suberbiola, X., Bardet, N. and Jalil, N.E., 2024. A new small duckbilled dinosaur (Hadrosauridae: Lambeosaurinae) from Morocco and dinosaur diversity in the late Maastrichtian of North Africa. Scientific Reports, 14(1), p.3665. PDF of paper Yours, Paul H.-
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- couche iii
- cretaceous
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Identification of Some Hadrosaur Teeth from North America
Troodon posted a topic in Questions & Answers
Although identification of Hadrosaurid teeth in North America is very difficult or impossible some older publications by John Horner give us some information to help us with a few. The information goes back a bit so there might be some new understanding but will share what is published. If anyone has publications that can add to the dentary information of teeth from North America please feel free to post it. Horner notes that on dentary teeth all Saurolophinae teeth have diamond-shaped crown whereas Lambeosaurinae teeth are more elongate see figure 13.4. So one may not be able to assign it to a specific genus but a Subfamily may be possible. Maxillary teeth can be different but not discussed.. Saurolophinae include: Edmontosaurus, Kritosaurus, Gryposaurus, Brachylophosaurus, Maiasaura, Brachylophoslaurus Lambeosaurinae include: Lambeosaurus, Parasaurolophus, Corythosaurus, Hypacrosaurus I would suggest that only complete teeth with fairly good preservation be used in any attempt to identify these teeth. Hell Creek & Lance Formation A publication on Edmontosaurus diversity in North America by N. Campione and D. Evans 2011 concluded that all there is only one species of hadrosaur in these faunas so all teeth found can be assigned to Edmontosaurus annectens. Judith River Formation Horner identifies dentary teeth with small denticles as Gryptosaurus (However not sure its been described from JRF so I would question this assignment) Two Medicine Formation Horner identifies dentary teeth with big denticles as Gryptosaurus latidens Horner identifies dentary teeth with very small denticles as Prosaurolophus maximus Hypacrosaurus stebingeri - The figure below shows variations with several species of dentary teeth Book: John Horner: Evidence of diphyletic origination of the Hadrosaruian in Dinosaur Systematics Approaches & Perspective Currie & Carpenter Chapter 13 Book: Dinosaurs under the Big Sky by Jack Horner 2001- 1 reply
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- edmontosaurus
- gryposaurus
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