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Fourth_trochanter
Fourth_trochanter

Fourth trochanter
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.

References

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Last updated on Saturday December 22, 2007 at 13:26:30 PST (GMT -0800)
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