malacostracan
Concise Oxford English Dictionary © 2008 Oxford University Press:
malacostracan /ˌmaləˈkɒstrək(ə)n/ Zoology
▶noun a crustacean of the large class Malacostraca, which includes crabs, shrimps, and lobsters, distinguished by having compound eyes that are typically on stalks. ▶adjective relating to malacostracans.
'malacostracan' also found in these Oxford entries:

