Trilobita sandbox

From Palaeos.org

Jump to: navigation, search
(copyedit)
(copyedit)
Line 2: Line 2:
==Introduction==
==Introduction==
-
The '''trilobites'' are an extinct class of marine arthropods. By the time true trilobites appear in the fossil record, during the Cambrian, they are already highly diverse and possess two characteristics that likely served them well to survive in the Paleozoic seas, a well- mineralized exoskeleton, and a highly advanced visual system. They particularly flourished during the Cambrian when the peak number of families existed.
+
The trilobites are already highly diverse when they appear in the fossil record in the lower Cambrian, providing strong evidence that they branched from their soft-bodied arthropod ancestors well before Cambrian time.  Two prominent morphological characteristics assured their survival and further diversity in the early Paleozoic seas, a well-mineralized exoskeleton, and a highly advanced visual system. They particularly expanded their presense during the Cambrian when the peak number of families existed.
==Fossil Record==
==Fossil Record==

Revision as of 12:52, 21 April 2007

Personal tools