Malacostraca ya iku kelas saka anggota Avertebrata kang kagolong ning filum Arthropoda, subfilum Crustacea. Awaké Malacostraca lumrahé ana 14 sègmen. Wolu segmen kang kagolong sefalotoraks, nanging ana enem segmen kang mbentuk abdomen. Malacostraca dibagi dadi pirang-pirang ordho.

Klasifikasi 
Kelas Malacostraca Latreille, 1802
 Upakelas Phyllocarida Packard, 1879
 † Archaeostraca Claus 1888
 † Hoplostraca Schram, 1973
 Leptostraca Claus, 1880
 Upakelas Hoplocarida Calman, 1904
 † Aeschronectida Schram, 1969
 † Archaeostomatopoda Schram, 1969
 Stomatopoda Latreille, 1817
 Upakelas Eumalacostraca Grobben, 1892
 Superordo Syncarida Packard, 1885
 † Palaeocaridacea Brooks, 1979
 Bathynellacea Chappuis, 1915
 Anaspidacea Calman, 1904
 Superordo Peracarida Calman, 1904
 Spelaeogriphacea Gordon, 1957
 Thermosbaenacea Monod, 1927
 Lophogastrida Sars, 1870
 Mysida Haworth, 1825
 Mictacea Bowman et al., 1985
 Amphipoda Latreille, 1816
 Isopoda Latreille, 1817
 Tanaidacea Dana, 1849
 Cumacea Krøyer, 1846
 Superordo Eucarida Calman, 1904
 Euphausiacea Dana, 1852
 Amphionidacea Williamson, 1973
 Decapoda Latreille, 1802

Rujukan 

Krustaséa