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The skeleton of early Eocene Cantius, oldest lemuriform primate
American Journal of Physical Anthropology
|January 1, 1985
Summary
A new Cantius trigonodus fossil reveals early primate anatomy. This ancient adapid primate had long hind limbs and short forelimbs, suggesting arboreal locomotion and leaping capabilities.
Area of Science:
- Paleontology
- Primate Evolution
- Eocene Mammals
Background:
- The discovery of Cantius trigonodus provides insights into early Eocene primate anatomy.
- Adapid primates represent an early radiation of lemuriform primates.
Purpose of the Study:
- To describe the anatomy of Cantius trigonodus based on a new partial skeleton.
- To infer the locomotion and posture of early lemuriform primates.
Main Methods:
- Analysis of a partial skeleton of Cantius trigonodus from the Willwood Formation.
- Comparative anatomical analysis with extant Malagasy lemurs and other fossil primates.
Main Results:
- Cantius trigonodus exhibits primitive features and numerous resemblances to extant Malagasy lemurs.
- Forelimb anatomy suggests active use in locomotion, while hind limb specializations indicate leaping and grasping abilities.
- Primitive traits like a long ischium suggest powerful thigh extension and knee flexion were important for posture and movement.
Conclusions:
- Cantius trigonodus was an active arboreal quadruped with a propensity for leaping.
- Its skeletal structure likely represents the primitive lemuriform morphology, offering clues to early primate evolution.