单词	malacostracan
释义	malacostracan /ˌmaləˈkɒstrək(ə)n / Zoology noun A crustacean of the large class Malacostraca, such as a crab, shrimp, or lobster.Malacostracans exhibit the hard, calcified exoskeleton typical of crustaceans.... Malacostracans play such an important role in aquatic ecosystems that their conservation is an important issue. Shifts between aquatic and terrestrial habitats were likely promoted by the availability of malacostracans in both terrestrial and aquatic habitats. adjective Relating to or denoting malacostracans.In a study of 47 species of malacostracan arthropods, Becker found that most of the taxa were not heavily fouled.... Classical eyestalk ablation experiments have demonstrated that malacostracan reproduction is under sinus gland control. Therefore, the homology of entomostracan and malacostracan neuronal stem cells remains uncertain.
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