How do ctenopod branchiopods feed?

Ctenopod branchiopods, like other members of the class Branchiopoda, primarily utilize their trunk limbs to feed. These limbs act in concert to filter, scrape, or otherwise gather food particles, which are then transported to the mouth via a ventral food groove.1

The diet of ctenopods consists largely of algae and bacteria. While the primitive branchiopod limb is a multipurpose flap used for locomotion, feeding, and respiration, the specific structure of the trunk limbs in ctenopods is adapted to support this filter feeding method. In these organisms, the carapace encloses the trunk while leaving the head free.213