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来自巴西的哺乳动物的特里亚斯纪晚期前身的骨受伤
Ana Laura Doneda1, Lívia Roese-Miron1,2, Leonardo Kerber3,4
1Centro de Apoio à Pesquisa Paleontológica, Universidade Federal de Santa Maria (CAPPA/UFSM), Rua Maximiliano Vizzotto, 598, 97230-000, São João Do Polêsine, RS, Brazil.
古生物学家在一个2.28亿年前的Exaeretodon riograndensis中发现了治愈的肋骨骨折,这是一种三叠纪的食草动物. 这种罕见的古病理学提供了对非哺乳动物类虫的行为和生存策略的见解.
科学领域:
- 古生物学的古生物学
- 脊椎动物古生物学 脊椎动物古生物学
- 古病理学 古病理学
背景情况:
- 一个成功的食草/无食类属的Traversodontidae主导了三纪时期.
- 非哺乳动物类的类动物为早期的类动物进化和古生态学提供了洞察力.
- 已灭绝物种的古病理学提供了个体生活经验和生存机制的罕见证据.
研究的目的:
- 为了描述和分析三叠纪穿越类标本的骨损伤.
- 调查埃克萨雷托顿河大猩猩 (Exaeretodon riograndensis) 创伤损伤的潜在原因和影响.
- 为促进对非哺乳动物类鱼古病理学的理解.
主要方法:
- 化石肋骨的宏观分析.
- 微型计算机断层扫描 (micro-CT) 用于详细检查骨结构.
- 标识骨,表明骨折愈合的迹象.
主要成果:
- 来自巴西的2.28亿年前的Exaeretodon riograndensis标本在肋骨上表现出治愈的横断骨折.
- 骨的证据表明,骨折发生在个体的一生中.
- 这种伤害可能会影响移动,食和躲避捕食者.
结论:
- 这是一个罕见的古病理案例,记录在非哺乳动物类鱼身上.
- 这些发现表明,即使有严重的伤害,生存是可能的,可能有助于群体行为.
- 这项研究增强了关于特里亚斯纪 cynodonts 的行为和古生态学的讨论.
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