Noun
clam shrimp (plural clam shrimps or clam shrimp)
Any branchiopod crustacean of the suborders Cyclestherida, Laevicaudata, or Spinicaudata (of the disused superorder Conchostraca), covered by a bivalve shell and well adopted to live in temporary, shallow ponds, with many identified extinct and extant species used to date strata.