16 magg 550278649 anni a. C. - trilobite unknown species #2

Descrizione:

trilobite lived 550 million years ago and survived the first mass extinction but were nearly fully wiped out during the second
http://www.ucmp.berkeley.edu/arthropoda/trilobita/trilobita.html

Aggiunto al nastro di tempo:

Data:

Immagini: