Arthropods-coelomates or pseudocoelomates?

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.
I thought arthropods were coelomates (according to Cliffs this is true) but QVault Bio lists them as pseudocoelomate?

Arthropods are Coelomates. Coelomates are species with internal body cavity. Their internal organs are attached to each other with a help from Mesoderm lining, but are still free to move within a cavity.
 
Top