Majoidea

Taxonomy

• Epialtidae
• Inachidae
• Inachoididae
• Majidae
• Oregoniidae

• family Epialtidae MacLeay, 1838
• family Hymenosomatidae MacLeay, 1838
• family Inachidae MacLeay, 1838
• family Inachoididae Dana, 1851
• family Majidae Samouelle, 1819 – "true" spider crabs
• family Mithracidae Balss, 1929
• family Oregoniidae Garth, 1958
• family Pisidae Dana, 1851

• Japanese spider crab, the largest living species of crab, found on the bottom of the Pacific Ocean.
• Libinia emarginata, the portly spider crab, a species of crab found in estuarine habitats on the east coast of North America.
• Hyas, a genus of spider crabs, including the great spider crab, found in the Atlantic and the North Sea.
• Maja squinado, sometimes called the "European long leg crab or pie faced crab" because of the way its face is shaped.
• Australian majid spider crab, found off Tasmania, are known to pile up on each other, the faster-moving crabs clambering over the smaller, slower ones.