Final answer:
Ardipithecus is the specimen found in Ethiopia during the late Miocene and Pliocene era, dating around 5.6-4.4 million years ago.
Step-by-step explanation:
The specimen found in Ethiopia during the late Miocene and Pliocene era, dating around 5.6-4.4 million years ago, is called Ardipithecus. Ardipithecus is the first hominin species discovered from the Pliocene era. It was identified through skeletal remains and is significant in understanding human evolution.