Table 1.
Nucleotide and protein sequences belonging to all orders of the Malacostraca class available from public databases at November 2007.
| Class | Subclass | Superorder | Order or Sub-order | Nucleotide sequences | Protein sequences |
| Malacostraca | Eumalacostraca | Eucarida | Decapoda | 97,083 | 7,862 |
| Malacostraca | Eumalacostraca | Eucarida | Euphausiacea | 434 | 310 |
| Malacostraca | Eumalacostraca | Hoplocarida | Stomatopoda | 119 | 214 |
| Malacostraca | Eumalacostraca | Peracarida | Amphipoda | 14,732 | 1,745 |
| Malacostraca | Eumalacostraca | Peracarida | Cumacea | 93 | 82 |
| Malacostraca | Eumalacostraca | Peracarida | Isopoda | 3,355 | 1,155 |
| Malacostraca | Eumalacostraca | Peracarida | Mictacea | 1 | 0 |
| Malacostraca | Eumalacostraca | Peracarida | Mysidacea | 771 | 561 |
| Malacostraca | Eumalacostraca | Peracarida | Spelaeogriphacea | 1 | 0 |
| Malacostraca | Eumalacostraca | Peracarida | Tanaidacea | 18 | 1 |
| Malacostraca | Eumalacostraca | Peracarida | Thermosbaenacea | 4 | 0 |
| Malacostraca | Eumalacostraca | Syncarida | Anaspidacea | 27 | 2 |
| Malacostraca | Eumalacostraca | Syncarida | Bathynellacea | 2 | 0 |
| Total | 116,640 | 11,932 | |||