trilobite

Yet if that is the right interpretation, it leaves the question of what evolved into the trilobites and their kind as mysterious as ever.

The Kaili formation in Eastern Guizhou, China is mainly made up of silty mudstone and shales abundant in trilobites.

Who's to say that our ideas won't vanish long before the trilobites did?

Tadpole shrimp have outlived dinosaurs, trilobites and mammoths.

Trilobites are an extinct group of sea-dwelling arthropods that are distantly related to crabs, scorpions and beetles.

Sponges , jellyfish and corals were joined by bony fish, scorpions and trilobites.

The earth's oceans were once filled with horse shoe crab-like critters called trilobites.

In short, the trilobites in the specimen are real enough, but the "print" itself is dubious.

Most of the fossils seen in Paleozoic rocks are invertebrate animals lacking backbones, such as corals, mollusks and trilobites.

The event took its hardest toll on marine organisms such as shelled brachiopods, eel-like conodonts, and the trilobites.

The first eyes grew on trilobites.

Two trilobites rest on top.

Shelly creatures such as trilobites and brachiopods, of whose ancestors there is little sign in the rocks, are suddenly everywhere.

Trilobites, for example, died out en masse about 250m years ago.