At least 15,000 species of trilobites lived over 300 million years ago in the Paleozoic oceans; their hard shells left plenty of fossils.
Illustrated fact sheets describe each of the eight orders, and there are galleries of photos.
Limestone deposits in England have yielded the fossilized remains of the oldest known crustacean, with the tiny animal's soft parts, including the appendages with which it ate, preserved in extraordinary detail.
The shrew-like animal would have run under the feet of dinosaurs at the start of the Jurassic period, nearly 195 million years ago.
This site shows some of their mistakes, and gives biographies of a few of the people who have gotten us where we are today.
Presents images of fossils from the research collections in the Division of Invertebrate Paleontology.
A display of quality individuals and spectacularly preserved specimens from the type and systematic collections at the Peabody Museum at Yale.
At first glance they all look like a cross between a horseshoe crab and a pill bug from your garden.
This website offers a huge compendium of trilobite lore and images.