Maxillopoda
Ctenocheilocaris, a mystacocarid
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Subphylum:	Crustacea
Class:	Maxillopoda Dahl, 1956
Sub-classes
Thecostraca (1,320 species) Tantulocarida (1,200 species) Branchiura (200 species) Pentastomida (100+ species) Mystacocarida (12 species) Copepoda (14,000 species)

Maxillopoda is a class under the phylum Arthropoda, subphylum Crustacea, and is characterised by a reduction of the abdomen and its appendages. The most species-rich groups are the barnacles and copepods.

The head is made up of 5 (five) segments, the thorax 6 (six) segments and the abdomen 4 (four) segments, as well as a telson. There are no appendages on the abdomen.

A common Maxillopoda are the many barnacles, often seen covering anything hard.

v • d • e Extant arthropod classes by subphylum Kingdom Animalia · Subkingdom Eumetazoa · (unranked) Bilateria · (unranked) Protostomia · Superphylum Ecdysozoa Chelicerata Arachnida · Xiphosura · Pycnogonida Myriapoda Chilopoda · Diplopoda · Pauropoda · Symphyla Hexapoda Insecta · Entognatha Crustacea Branchiopoda · Remipedia · Cephalocarida · Maxillopoda · Ostracoda · Malacostraca

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