1) Transitional fossil
Found on
https://www.crosswordclues.com/clue/sinoconodon
Sinoconodon rigneyi is an ancient mammaliamorph or early mammal (depending on systematic approach) that appears in the fossil record of China in the Sinemurian stage of the Early Jurassic period, about 193 million years ago. While in many traits very similar to reptiles, it possessed of a special, secondarily evolved jaw joint between the dentary ...
Found on
http://en.wikipedia.org/wiki/Sinoconodon
No exact match found.
