Protostomia (Protostomes) is a class of animals. There are 1259234 species of Protostomes, in 130060 genera and 6746 families. This class has been around since the ediacaran period. They includes groups like Arrow Worms, Spiralians, and Ecdysozoans.
EOL has data for 4 attributes, including:
The environments in which many Protostomes species are known to live. Select an environment to see its Protostomes species checklist.