A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico
Brachylophosaurini is a clade of hadrosaurid dinosaurs from the Campanian of western North America. Although well-known from northern localities in Montana and Alberta, including abundant material of Brachylophosaurus canadensis and Maiasaura peeblesorum and the holotypes of Acristavus gagslarsoni a...
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| Format: | Article |
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PeerJ Inc.
2021-04-01
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| author | Andrew T. McDonald Douglas G. Wolfe Elizabeth A. Freedman Fowler Terry A. Gates |
| author_facet | Andrew T. McDonald Douglas G. Wolfe Elizabeth A. Freedman Fowler Terry A. Gates |
| author_sort | Andrew T. McDonald |
| collection | DOAJ |
| description | Brachylophosaurini is a clade of hadrosaurid dinosaurs from the Campanian of western North America. Although well-known from northern localities in Montana and Alberta, including abundant material of Brachylophosaurus canadensis and Maiasaura peeblesorum and the holotypes of Acristavus gagslarsoni and Probrachylophosaurus bergei, material from southern localities in Utah and Colorado is restricted to a partial skull referred to A. gagslarsoni and several indeterminate specimens. Here we describe Ornatops incantatus gen. et sp. nov., a new brachylophosaurin known from a partial skeleton from the Allison Member of the Menefee Formation in New Mexico. Ornatops is the first brachylophosaurin reported from New Mexico and the southernmost occurrence of the clade. Ornatops shares with Probrachylophosaurus and Brachylophosaurus a caudally expanded nasofrontal suture on the frontals, but also exhibits an autapomorphic nasofrontal suture morphology, with a horizontal rostral region and elevated caudal region with two prominent parasagittal bumps, which is different from other brachylophosaurin specimens, including juvenile and adult Brachylophosaurus. A phylogenetic analysis places Ornatops in a trichotomy with Probrachylophosaurus and Brachylophosaurus, with Maiasaura and Acristavus as successive outgroups. |
| first_indexed | 2024-03-09T06:30:10Z |
| format | Article |
| id | doaj.art-965b2bae133a4a9db8b39bc90ebd987b |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T06:30:10Z |
| publishDate | 2021-04-01 |
| publisher | PeerJ Inc. |
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| spelling | doaj.art-965b2bae133a4a9db8b39bc90ebd987b2023-12-03T11:10:00ZengPeerJ Inc.PeerJ2167-83592021-04-019e1108410.7717/peerj.11084A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New MexicoAndrew T. McDonald0Douglas G. Wolfe1Elizabeth A. Freedman Fowler2Terry A. Gates3Western Science Center, Hemet, CA, USAZuni Dinosaur Institute for Geosciences, Springerville, AZ, USADickinson State University, Dickinson, ND, USADepartment of Biological Sciences, North Carolina State University, Raleigh, NC, USABrachylophosaurini is a clade of hadrosaurid dinosaurs from the Campanian of western North America. Although well-known from northern localities in Montana and Alberta, including abundant material of Brachylophosaurus canadensis and Maiasaura peeblesorum and the holotypes of Acristavus gagslarsoni and Probrachylophosaurus bergei, material from southern localities in Utah and Colorado is restricted to a partial skull referred to A. gagslarsoni and several indeterminate specimens. Here we describe Ornatops incantatus gen. et sp. nov., a new brachylophosaurin known from a partial skeleton from the Allison Member of the Menefee Formation in New Mexico. Ornatops is the first brachylophosaurin reported from New Mexico and the southernmost occurrence of the clade. Ornatops shares with Probrachylophosaurus and Brachylophosaurus a caudally expanded nasofrontal suture on the frontals, but also exhibits an autapomorphic nasofrontal suture morphology, with a horizontal rostral region and elevated caudal region with two prominent parasagittal bumps, which is different from other brachylophosaurin specimens, including juvenile and adult Brachylophosaurus. A phylogenetic analysis places Ornatops in a trichotomy with Probrachylophosaurus and Brachylophosaurus, with Maiasaura and Acristavus as successive outgroups.https://peerj.com/articles/11084.pdfOrnatops incantatusBrachylophosauriniHadrosauridaeAllison MemberMenefee FormationNew Mexico |
| spellingShingle | Andrew T. McDonald Douglas G. Wolfe Elizabeth A. Freedman Fowler Terry A. Gates A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico PeerJ Ornatops incantatus Brachylophosaurini Hadrosauridae Allison Member Menefee Formation New Mexico |
| title | A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico |
| title_full | A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico |
| title_fullStr | A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico |
| title_full_unstemmed | A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico |
| title_short | A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico |
| title_sort | new brachylophosaurin dinosauria hadrosauridae from the upper cretaceous menefee formation of new mexico |
| topic | Ornatops incantatus Brachylophosaurini Hadrosauridae Allison Member Menefee Formation New Mexico |
| url | https://peerj.com/articles/11084.pdf |
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