Malacostraca

1. In former classifications a division of Malacostraca; superseded by the orders Mysidacea and Euphausiacea.
   在以前的分类中是软甲亚纲的一个部；现在被糠虾目和鳞虾目取代。
2. Zoogeographical analysis of the freshwater crab from Hubei province, with descriptions of new subspecies ( malacostraca: decapoda)
   湖北省淡水蟹类的动物地理学分析及新亚种的记述（软甲纲：十足目）

noun

1. largest subclass of Crustacea including most of the well-known marine, freshwater, and terrestrial crustaceans: crabs

   Synonym:    subclass Malacostraca