A restoration of the tiny trilobite Ctenopyge ceciliae. From Schoenemann et al, 2010. These simplified illustrations of prehistoric sea life did not do the trilobites justice. Time and again they were ...

Eleven species of trilobites from the Pleasant Hill Limestone in Blair and Huntingdon Counties are described and illustrated. A new genus, Blairella (type species: B. crassimarginata Rasetti, n. sp.) ...

Seven new trilobite genera and species of late Lower and early Middle Cambrian age are described. The necessity for recognizing the importance of facies in determining the generic composition of early ...

Fossils can tell scientists a lot about an animal such as their morphology, their environment, and where to place them in the tree of life. One thing though that’s very difficult to observe in the ...

A study finds that animal life's "Big Bang" ended much sooner than previously thought. The sudden appearance of numerous diverse animals more than 500 million years ago, known as the Cambrian ...

Rare fossils found along the Colorado River 'give us a fuller picture of what life was like during the Cambrian period,' says ...

Trilobites, such as this Mummaspis muralensis, emerged during the Cambrian Period and went extinct more than 250 million years ago. About 513 million years ago, a creature curled up like a pill bug to ...

Trilobites achieved their maximum genetic diversity in the Cambrian. However, unlike this diversity measure, the morphological disparity of trilobites based on cranidial outline reached the peak in ...

An artist's depiction of Anomalocaris canadensis. The grey-colored creature is depicted swimming underwater and has a whale-like tail, appendages extending from either side of its long body, and two ...

The great, car-sized predatory "shrimp" that was master of Earth's seas a half billion years ago may have been unable to eat anything harder than baby food. Several lines of evidence along with a new ...

Biomechanical studies on the arachnid-like front "legs" of an extinct apex predator show that the 2-foot (60 centimeter) marine animal Anomalocaris canadensis was likely much weaker than once assumed.