Animalia > Arthropoda > Malacostraca

Malacostraca (crabs, krill, pill bugs, shrimp, and relatives)

Wikipedia Abstract

Malacostraca is the largest of the six classes of crustaceans, containing about 40,000 living species, divided among 16 orders. Its members, the malacostracans, display a great diversity of body forms and include crabs, lobsters, crayfish, shrimp, krill, woodlice, scuds (Amphipoda), mantis shrimp and many other less familiar animals. They are abundant in all marine environments and have colonised freshwater and terrestrial habitats. They are segmented animals, united by a common body plan comprising 20 body segments (rarely 21), and divided into a head, thorax, and abdomen.
View Wikipedia Record: Malacostraca


Amphipoda (amphipods) (10,782)   (15)
Anaspidacea (19)
Bathynellacea (Shrimp) (163)
Bochusacea (6)
Cumacea (cumaceans) (1,864)
Decapoda (crabs, shrimp, and relatives) (17,680)   (192)   (5)
Euphausiacea (krill) (82)
Isopoda (pillbugs and sowbugs) (10,717)   (18)   (1)
Leptostraca (70)
Lophogastrida (64)
Mysida (1,313)   (2)
Stomatopoda (mantis shrimp) (530)
Tanaidacea (tanaidaceans) (1,608)
Thermosbaenacea (Shrimp) (45)



External References

Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0