1) Transitional fossil
Found on
https://www.crosswordclues.com/clue/amphistium
Amphistium paradoxum, the only species classified under the genus Amphistium, is a 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 ...
Found on
http://en.wikipedia.org/wiki/Amphistium
No exact match found.
