跳、走还是蹦?袋鼠的肢体比例和已灭绝的袋鼠属可能的运动方式

IF 1.6 3区 生物学 Q2 ZOOLOGY
Billie Jones, Christine M. Janis
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引用次数: 0

摘要

袋鼠(Macropodoidea)的运动模式多种多样,从四足奔跑到两足跳跃;但跳跃有体重限制,一些已经灭绝的类群已经超过了这一限制。在更新世,存在多种 "巨型 "袋鼠,既有已灭绝的史氏袋鼠亚科(Sthenurinae),也有现存的大袋鼠亚科(Macropodinae)(均属大袋鼠科)。Sthenurine以前被认为具有一种不同于现生袋鼠的运动方式(双足跨步),但与现生大型袋鼠关系密切的已灭绝的 "巨型 "大袋鼠属Protemnodon大型物种的主要运动方式却很少受到质疑,一直被认为是跳跃式的。在这里,我们通过研究功能性肢体指数来评估巨足目动物肢体比例与运动模式之间的关联。我们的研究表明,大型(100 千克)原脚类动物不同于任何其他已知的巨脚类动物;它们在这一功能形态空间中所处的位置,以及之前发表的有关肱骨形态的证据,支持了之前的假设,即主要采用四足运动模式,很可能是某种束缚运动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Hop, walk or bound? Limb proportions in kangaroos and the probable locomotion of the extinct genus Protemnodon

Hop, walk or bound? Limb proportions in kangaroos and the probable locomotion of the extinct genus Protemnodon

Kangaroos (Macropodoidea) display a diversity of locomotor modes, from bounding quadrupedally to hopping bipedally; but hopping has a body mass limit, which was exceeded by a number of extinct taxa. In the Pleistocene, a variety of “giant” kangaroos existed, both within the extinct subfamily Sthenurinae and the extant subfamily Macropodinae (both within the family Macropodidae). Sthenurines have been previously considered to have a type of locomotion (bipedal striding) different from extant kangaroos, but the primary locomotor mode of the large species of the extinct “giant” macropodine genus Protemnodon, closely related to extant large kangaroos, has undergone little question and has been assumed to be hopping. Here, the association between limb proportions and locomotor mode across Macropodoidea is assessed by examination of functional limb indices. We show that large (> 100 kg) Protemnodon species are unlike any other known macropodoids; their position in this functional morphospace, along with previously published evidence on humeral morphology, supports a prior hypothesis of a primarily quadrupedal mode of locomotion, likely some sort of bounding.

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来源期刊
CiteScore
4.30
自引率
10.50%
发文量
45
审稿时长
>12 weeks
期刊介绍: Journal of Mammalian Evolution is a multidisciplinary forum devoted to studies on the comparative morphology, molecular biology, paleobiology, genetics, developmental and reproductive biology, biogeography, systematics, ethology and ecology, and population dynamics of mammals and the ways that these diverse data can be analyzed for the reconstruction of mammalian evolution. The journal publishes high-quality peer-reviewed original articles and reviews derived from both laboratory and field studies. The journal serves as an international forum to facilitate communication among researchers in the multiple fields that contribute to our understanding of mammalian evolutionary biology.
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