The earliest trilobites known from the fossil record are redlichiids and ptychopariid bigotinids dated to some 8]  Contenders for the earliest trilobites include ...
Trilobites are remarkable, hard-shelled, segmented creatures that existed over 520 million years ago in the Earth's ancient seas. They went extinct before ...
Trilobite Website. Introduction to Trilobites; Gallery of Trilobites. Cambrian Period Trilobites . Cambrian Trilobites of the United States (alphabetized)
Trilobite Fossils. EARLY CAMBRIAN PERIOD to LATE PERMIAN PERIOD: 570 million - 230 million years ago. Trilobites are hard-shelled, segmented creatures that lived ...
Trilobites are hard-shelled, segmented members of the phylum Arthropoda and the class Trilobita that appear in the fossil record for almost 300 million years—from ...
The trilobites (Phylum Arthropoda, Class Trilobita) first appear in the fossil record in the Lower Cambrian some 540 ...
What is a trilobite? A trilobite is form of invertebrate marine life that lived more than 550 million years ago, but are now extinct. These hard-shelled prehistoric ...
Trilobites Introduction. Trilobites comprise a complex and huge clade of arthropods with estimates of number of species ranging ...
All aspects of the biology and classification of trilobites, including morphology, ecology, localities, reproduction, development, behavior, biostratigraphy, etc.
Trilobite, any member of a group of extinct fossil arthropods easily recognized by their distinctive three-lobed, three-segmented form. Trilobites, exclusively marine ...