Stasis (biology)

Stasis in biology refers to the phenomenon of types of living creatures showing little or no change over long periods of time. Apparent stasis in the fossil record was a major reason behind the punctuated equilibrium theory of Stephen Jay Gould and Niles Eldredge. The phenomenon of stasis has been used as evidence against gradual evolution in general.

## Examples[edit]

* A shrimp-like crustacean dated at 425 million years old was assigned to a living species because it was so similar[1]
* Earthworms are thought to be over 120 million years old

## References[edit]

1. ↑ https://creation.com/evolutionary-stasis#_ftn1