A revision of enantiornithine (Aves: Ornithothoraces) skull morphology

IVPP-IR > 中科院古脊椎所（2000年以后）

	A revision of enantiornithine (Aves: Ornithothoraces) skull morphology
	O'Connor, Jingmai K.1,2; Chiappe, Luis M.2; jingmai@usc.edu
	2011
发表期刊	JOURNAL OF SYSTEMATIC PALAEONTOLOGY
ISSN	1477-2019
卷号	9 期号:1 页码:135-157
文章类型	Article
摘要	Enantiornithines are the most speciose avian clade in the Mesozoic, with a fossil record that nearly spans the Cretaceous; however, with less than half of known taxa preserving skull material, our understanding of their cranial morphology remains incomplete. Here we present a comprehensive overview of the current knowledge of enantiornithine skull anatomy and discuss the range of morphologies known for each of the main cranial elements. The typical enantiornithine skull retains numerous ancestral features such as the absence of fusion among bones, the presence of a postorbital bone, a primitive quadrate with a single headed otic process, an unforked dentary, and teeth. The postorbital in at least one taxon is unreduced, suggesting the existence of a complete infratemporal fenestra and thus an unmodified diapsid skull as in confuciusornithids. The rostrum is well known and shows considerable variation, typical of theropods; however, in terms of rostral proportions, enantiornithines are extremely limited within the modern avian spectrum. Although Late Cretaceous skull material is extremely fragmentary, when compared to Early Cretaceous material it reveals a trend towards more specialized morphologies in younger taxa. The foramen magnum in all taxa points caudally, indicating that the 'flexed' type skull morphology may not have evolved in this group. Enantiornithine teeth show considerable diversity in numbers, size, morphology and placement, ranging from taxa with large teeth found throughout the jaws to taxa with small, rostrally restricted teeth, to the fully edentulous. Despite limited preservation of skull material, a number of trophic specializations can be deduced from the range of preserved morphologies, further hinting at the morphological and ecological diversity of the Cretaceous Enantiornithes.
关键词	Avian Skull Variation Cretaceous
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
URL	查看原文
关键词[WOS]	EARLY CRETACEOUS BIRD ; ORNITHURINE BIRD ; NORTHERN HEBEI ; AVIAN FLIGHT ; CHINA ; EVOLUTION ; RADIATION ; ANATOMY ; SPAIN ; DINOSAURS
收录类别	SCI
语种	英语
WOS研究方向	Evolutionary Biology ; Paleontology
WOS类目	Evolutionary Biology ; Paleontology
WOS记录号	WOS:000287404500014
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/4471
专题	中科院古脊椎所（2000年以后）
通讯作者	jingmai@usc.edu
作者单位	1.Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 2.Los Angeles Cty Museum Nat Hist, Dinosaur Inst, Los Angeles, CA 90007 USA
推荐引用方式 GB/T 7714	O'Connor, Jingmai K.,Chiappe, Luis M.,jingmai@usc.edu. A revision of enantiornithine (Aves: Ornithothoraces) skull morphology[J]. JOURNAL OF SYSTEMATIC PALAEONTOLOGY,2011,9(1):135-157.
APA	O'Connor, Jingmai K.,Chiappe, Luis M.,&jingmai@usc.edu.(2011).A revision of enantiornithine (Aves: Ornithothoraces) skull morphology.JOURNAL OF SYSTEMATIC PALAEONTOLOGY,9(1),135-157.
MLA	O'Connor, Jingmai K.,et al."A revision of enantiornithine (Aves: Ornithothoraces) skull morphology".JOURNAL OF SYSTEMATIC PALAEONTOLOGY 9.1(2011):135-157.

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