
1) Transitional fossil
Found on
https://www.crosswordclues.com/clue/enaliarctos

Enaliarctos is an extinct genus of pinniped. Prior to the discovery of Puijila, the five species in the genus Enaliarctos represented the oldest known pinniped fossils, having been recovered from late Oligocene and early Miocene (ca. 24–22 million years ago) strata of California and Oregon. It had a short tail and developed limbs with webbed fee...
Found on
http://en.wikipedia.org/wiki/Enaliarctos
No exact match found.