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来自新墨西哥州上白垩统梅尼菲组的一种新短冠龙类（恐龙：鸭嘴龙科）。

A new brachylophosaurin (Dinosauria: Hadrosauridae) from the Upper Cretaceous Menefee Formation of New Mexico.

作者信息

McDonald Andrew T, Wolfe Douglas G, Freedman Fowler Elizabeth A, Gates Terry A

机构信息

Western Science Center, Hemet, CA, USA.

Zuni Dinosaur Institute for Geosciences, Springerville, AZ, USA.

出版信息

PeerJ. 2021 Apr 2;9:e11084. doi: 10.7717/peerj.11084. eCollection 2021.

DOI:10.7717/peerj.11084
PMID:33859873
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8020878/
Abstract

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 and and the holotypes of and , material from southern localities in Utah and Colorado is restricted to a partial skull referred to . and several indeterminate specimens. Here we describe gen. et sp. nov., a new brachylophosaurin known from a partial skeleton from the Allison Member of the Menefee Formation in New Mexico. is the first brachylophosaurin reported from New Mexico and the southernmost occurrence of the clade. shares with and 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 . A phylogenetic analysis places in a trichotomy with and , with and as successive outgroups.

摘要

短冠龙类是北美西部坎帕阶的一类鸭嘴龙科恐龙。尽管在蒙大拿州和艾伯塔省的北部地区广为人知，包括大量的[具体物种1]和[具体物种2]材料以及[具体物种3]和[具体物种4]的正模标本，但来自犹他州和科罗拉多州南部地区的材料仅限于一个归入[具体物种5]的部分头骨以及几个不确定的标本。在此，我们描述了新属新种[新物种名称]，这是一种来自新墨西哥州梅尼菲组艾利森段的部分骨骼的新短冠龙类。[新物种名称]是新墨西哥州报道的首个短冠龙类，也是该类群最南端的发现。[新物种名称]与[具体物种1]和[具体物种2]一样，额骨上有一条向尾端扩展的鼻额缝，但也展现出一种自近裔性状的鼻额缝形态，其吻部区域水平，尾端区域隆起，有两个明显的矢状旁突，这与其他短冠龙类标本不同，包括幼年和成年的[具体物种1]和[具体物种2]。系统发育分析将[新物种名称]与[具体物种1]和[具体物种2]置于一个三分支中，以[具体物种1]和[具体物种2]作为连续的外类群。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/3aeaa622966b/peerj-09-11084-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/5834a394718f/peerj-09-11084-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/cb9f19d424fa/peerj-09-11084-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/21efd9104ac9/peerj-09-11084-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/f8e8b8867c65/peerj-09-11084-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/fdbc1609c1f0/peerj-09-11084-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/89cacb67e2ba/peerj-09-11084-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/448a8ffdb8b2/peerj-09-11084-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/bc36027edc4a/peerj-09-11084-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/de680e8996a0/peerj-09-11084-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/e075576453b0/peerj-09-11084-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/7ba97ca534e9/peerj-09-11084-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/3aeaa622966b/peerj-09-11084-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/5834a394718f/peerj-09-11084-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/cb9f19d424fa/peerj-09-11084-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/21efd9104ac9/peerj-09-11084-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/f8e8b8867c65/peerj-09-11084-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/fdbc1609c1f0/peerj-09-11084-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/89cacb67e2ba/peerj-09-11084-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/448a8ffdb8b2/peerj-09-11084-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/bc36027edc4a/peerj-09-11084-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/de680e8996a0/peerj-09-11084-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/e075576453b0/peerj-09-11084-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/7ba97ca534e9/peerj-09-11084-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb1/8020878/3aeaa622966b/peerj-09-11084-g012.jpg

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