谁是真正的剑牙捕食者:泰拉科斯米勒或泰拉科利奥?
1Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol, UK.
Anatomical record (Hoboken, N.J. : 2007)
|April 10, 2024
概括
已灭绝的有袋动物捕食者Thylacosmilus和Thylacoleo不是胎盘 sabertooths的简单类型. 它们独特的形态学表明,它们的捕食或清理策略不同于以前的假设.
科学领域:
- 古生物学的古生物学
- 脊椎动物动物学 脊椎动物动物学
- 进化生物学 进化生物学
背景情况:
- 已灭绝的胎盘 sabertooth 捕食者,主要是 feloids,主导着哺乳动物食肉动物的.
- 来自南半球的Thylacosmilus和Thylacoleo等甲状动物捕食者经常与胎盘 sabertooths进行比较.
研究的目的:
- 为了比较已灭绝的甲状动物食肉动物 (Thylacosmilus和Thylacoleo) 与胎盘 sabertooths 的形态和捕食角色.
- 重新评估这些灭绝的掠食性哺乳动物之间的类比关系.
主要方法:
- 对Thylacosmilus和Thylacoleo进行了比较形态分析.
- 功能性解读牙和头骨解剖与掠夺行为相关的功能解读.
- 基于解剖学证据的生态作用评估.
主要成果:
- 泰拉科斯米勒斯,尽管有类似刀剑的犬类,但很可能是食尸体,而不是积极地捕食像鱼这样的猎物.
- 泰拉科莱奥没有,它的切口与类犬不相似,这表明它具有不同的捕食机制.
- 泰拉科莱奥是一个强大的捕食者,可能填补一个类似于胎盘剑牙的生态形态.
结论:
- 无论是Thylacosmilus还是Thylacoleo都不能简单地与它们所谓的胎盘对应物进行类比.
- 泰拉科莱奥,尽管缺少,但由于其捕食能力,它是" marsupial sabertooth"角色的更强有力的候选人.
- 重新评估已灭绝的甲类食肉动物古生物学对于理解哺乳动物捕食者进化至关重要.
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