Pygidium Collection

Calymene blumenbachii, trilobite model
Depicted here is a model of a Silurian-Devonian trilobite. Trilobites had a carapace, or shell. They were arthropods as crustaceans, spiders and insects are today

SEM of earthworm
Common earthworm. Coloured scanning electron micrograph (SEM) of the rear end of a common earthworm (Lumbricus terrestris)

Encrinurus variolaris, trilobite
Trilobites had a carapace, or shell which was divided into three parts. Trilobites were arthropods as crustaceans, spiders and insects are today

Biceratops, trilobite
Biceratops, a Cambrian trilobite. Trilobites had a carapace, or shell was divided into three parts. Trilobites were arthropods as crustaceans, spiders and insects are today

Coloured SEM of an earthworm, Lumbricus t
Common earthworm. Coloured scanning electron micrograph (SEM) of the rear end of a common earthworm (Lumbricus terrestris). The anus (light brown) is found on the earthworms last segment (pygidium)

Fossil trilobite preserved in siltstone, from the Burgess Shale area. Trilobites are arthropods that lived in the sea during the Cambrian Era more than 300 million years ago

Trilobite fossil, SEM
Trilobite fossil, coloured scanning electron micrograph (SEM). Trilobites were arthropods, the shelled segmented invertebrates that include crabs and insects and spiders

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