The Arachnids are a class of eight-legged arthropods.

The Entognatha are a class of ametabolous arthropods, which, together with insects, makes up the subphylum Hexapoda.

But he was also known as an expert on a large class of fossilized arthropods like crustaceans, known as trilobites, and on the wildflowers of the Alps.

Most major classes of predatory and parasitic arthropods contain species that eat pollen, despite the common perception that bees are the primary pollen-consuming arthropod group.

Dr. Eldredge, who is 59, came to this radical, staccato view of life by studying the forms of trilobites, an ancient class of arthropods that ruled the earth in the Paleozoic era, some 300 million years ago.

The morphology of insects enables the phenomenal success of this class of arthropods.

Gabriellus is an extinct genus from a class of fossil marine arthropods, the trilobites.

The four species of horseshoe crab are the only remaining members of the Xiphosura, one of the oldest classes of marine arthropods.

Diplorrhina is a genus of trilobites, a well known class of extinct marine arthropods.

Fritzolenellus is an extinct genus from a well-known class of fossil marine arthropods, the trilobites, with three known species.