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DOI	10.1016/j.palaeo.2019.109404
	Early growth dynamics of titanosaur sauropods inferred from bone histology
	González R.; Cerda I.A.; Filippi L.S.; Salgado L.
发表日期	2020
ISSN	0031-0182
卷号	537
英文摘要	Histological studies have proven to be a powerful tool for addressing sauropod paleobiology, with most focus on adult and subadult individuals. The aim of this study is to describe long bone histology (femur) in early juvenile titanosaur sauropods, to expand our knowledge about early stages of development. The material consists of two small femora of indeterminate titanosaurs from the Upper Cretaceous Bajo de la Carpa and Allen formations of Argentina. Both femora from juvenile specimens show predominant fibrolamellar bone tissue with plexiform vascularization pattern, suggesting a fast growth rate. Despite the early stage of development of the studied specimens, secondary remodelling is evident in one of them. In the other sample, a growth mark is observed, which suggests unexpected cyclical growth and a possible departure from the typical growth strategy of sauropod dinosaurs. In addition, we examine indeterminate long bones of titanosaur embryos from the Anacleto Formation of Argentina. The embryos shows poor development of cortical bone, high density of large simple canals and presence of Kastschenko's line suggest that these individuals died during an early stage of ossification. This study reveals that the early growth of at least some titanosaurs departs from the reported in neosauropod dinosaurs. © 2019 Elsevier B.V.
英文关键词	Bone microstructure; Early ontogeny; Sauropod paleobiology; South America
语种	英语
scopus关键词	biostratigraphy; bone; Cretaceous; dinosaur; fossil record; histology; juvenile; microstructure; ontogeny; Argentina; Dinosauria; Sauropoda
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150748
作者单位	Centro de Ecología Aplicada del Litoral (CONICET-UNNE), Ruta 5, Km 2,5, Corrientes, CP3400, Argentina; CONICET-Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro. Museo Provincial Carlos Ameghino, Belgrano 1700, Paraje Pichi Ruca (predio Marabunta), Cipolletti, Río Negro CP8300, Argentina; Museo Municipal Argentino Urquiza, Chos Malal S/n (esquina Av. 30 de Octubre), Rincón de Los Sauces, Neuquén Q8319BFA, Argentina; CONICET- Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro. Av. Julio A, Roca 1242, General Roca, Río Negro 8332, Argentina
推荐引用方式 GB/T 7714	González R.,Cerda I.A.,Filippi L.S.,et al. Early growth dynamics of titanosaur sauropods inferred from bone histology[J],2020,537.
APA	González R.,Cerda I.A.,Filippi L.S.,&Salgado L..(2020).Early growth dynamics of titanosaur sauropods inferred from bone histology.Palaeogeography, Palaeoclimatology, Palaeoecology,537.
MLA	González R.,et al."Early growth dynamics of titanosaur sauropods inferred from bone histology".Palaeogeography, Palaeoclimatology, Palaeoecology 537(2020).