For 10 points, name this diverse group of insectÂ­like fossil animals named for their threeÂ­lobed bodies.
These animals possessed compound eyes with calcite lenses. The nearest living relatives of these creatures are horseshoe crabs. These creatures became the most common animals on Earth during the Cambrian explosion, but these (*) waterÂ­dwelling arthropods went extinct at the end of the Permian period. For 10 points, name this diverse group of insectÂ­like fossil animals named for their threeÂ­lobed bodies.
These animals possessed compound eyes with calcite lenses. The nearest living relatives of these creatures are horseshoe crabs.
trilobites (accept Trilobita)