Amphistium is a genus of fossil fish which has been identified as an early relative of the Flatfish, and as a Transitional fossil. In a typical modern flatfish, the head is asymmetric with both eyes on one side of the head. In Amphistium, the transition from the typical symmetric head of a vertebrate is incomplete, with one eye placed near the top of the head.[1]
Heteronectes is similar fossil.
References[]
- ^ Matt Friedman (2008-07-10). "The evolutionary origin of flatfish asymmetry". Nature 454 (7201): 209-212. doi:.
