Learn how to say Malacostracan correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word malacostracan:
any crustacean of the subclass or group Malacostraca, including lobsters, crabs, woodlice, sand hoppers, and opossum shrimps
of, relating to, or belonging to the Malacostraca
C19: from New Latin, from Greek malakōstrakos, from malaco- + ostrakon shell