Craniofacial lesions in the earliest predatory dinosaurs indicate intraspecific agonistic behaviour at the dawn of the dinosaur era

IF 2.1 3区 生物学 Q2 MULTIDISCIPLINARY SCIENCES
Mauricio S. Garcia, Ricardo N. Martínez, Rodrigo T. Müller
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引用次数: 0

Abstract

Herrerasauridae were among the first large carnivorous dinosaurs. Although their anatomy and phylogenetic relationships have been previously studied, little is known about their paleobiology. Bone pathologies provide clues about the behaviour of ancient organisms, and this study evaluates presumed craniofacial pathologies in herrerasaurid specimens to infer their etiology and implications. Our analysis reveals that the craniofacial marks analysed are most likely pathological in nature and possibly result from intraspecific agonistic interactions, rather than post-mortem alterations. The relatively high frequency of lesions identified supports this claim. In the sample of herrerasaurids with preserved skulls analysed, nearly half presented craniofacial lesions. The bone traumas identified here are the oldest evidence of pathology in dinosaurs. Identification and analysis of pathologies in early dinosaurs can provide insights into their paleobiology and evolution of behavioural characteristics.

戟龙科是最早的大型肉食恐龙之一。虽然以前对它们的解剖学和系统发育关系进行过研究,但对它们的古生物学知之甚少。骨骼病理学提供了有关远古生物行为的线索,本研究评估了戟龙科标本中假定的颅面病理学,以推断其病因和影响。我们的分析表明,所分析的颅面伤痕很可能是病理性质的,可能是种内争斗互动的结果,而不是死后的改变。所发现的病变频率相对较高,支持了这一说法。在分析的保存有头骨的戟龙样本中,近一半出现了颅面损伤。这里发现的骨骼创伤是恐龙病变的最古老证据。鉴定和分析早期恐龙的病理变化,可以深入了解它们的古生物学和行为特征的演变。
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来源期刊
The Science of Nature
The Science of Nature 综合性期刊-综合性期刊
CiteScore
3.40
自引率
0.00%
发文量
47
审稿时长
4-8 weeks
期刊介绍: The Science of Nature - Naturwissenschaften - is Springer''s flagship multidisciplinary science journal. The journal is dedicated to the fast publication and global dissemination of high-quality research and invites papers, which are of interest to the broader community in the biological sciences. Contributions from the chemical, geological, and physical sciences are welcome if contributing to questions of general biological significance. Particularly welcomed are contributions that bridge between traditionally isolated areas and attempt to increase the conceptual understanding of systems and processes that demand an interdisciplinary approach.
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