Two new genera, Poliellaites and Piochella, and six new species, Eokochaspis? cabinensis, Nyella? plana, Poliellaites gloriosa, Piochella peasleensis, Poliella ovala, and Stephenaspis highlandensis, ...

The Kaibab Limestone in northern Arizona, southern Utah, and southern Nevada contains an unusually extensive fossil record of Permian (Leonardian) trilobites which is here interpreted with respect to ...

For those who might not know it, arthropods are a fascinating prehistoric creature highlighted by a new traveling exhibition, “Trilobite Treasures: Arthropods of the Ancient Seas” opening at the ...

The abundant diversity of characteristics within species likely helped fuel the proliferation and evolution of an odd-looking creature that emerged from an unprecedented explosion of life on Earth ...