Drotops megalomanicus Trilobite in Defensive Posture Drotops megalomanicus Trilobites Order Phacopida, Family Phacopidae Geological Time : Middle Devonian Size (25.4 mm = 1 inch): Trilobite is 175 mm long (curve measure) 75 mm across. Matrix: 70 mm by 75 mm. Fossil Site: Djebel Issimour, Alnif, Morocco
Waptia fieldensis is an extinct species of arthropod from the Middle Cambrian Burgess Shale Lagerstätte of Canada. It grew to a length of about 8 cm and resembled modern shrimp in both morphology and habit.