Fourth trochanter
From Wikipedia, the free encyclopedia
The Fourth trochanter is a shared characteristic common to archosaurs. It is a knob-like feature on the femur that serves as a muscle attachment.
This Fourth trochanter first appeared in the Erythrosuchidae, large basal archosaurian predators of the early Triassic period.
[edit] References
- Benton, M. J. (2000), Vertebrate Paleontology, 2nd Ed. p.136; (2004) 3rd edition, Blackwell Science Ltd
