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Noun1.Macrocheira - giant crabs of JapanMacrocheira - giant crabs of Japan      
arthropod genus - a genus of arthropods
family Majidae, Majidae - spider crabs
giant crab, Macrocheira kaempferi - very large deep-water Japanese crab
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References in periodicals archive ?
All members of Pleocyemata, including, among others, caridean shrimps, mud prawns, brachyuran crabs, clawed lobsters, and spiny lobsters, brood embryos irrespectively of parental body size, which in some species may attain up to 3.7 m (i.e., leg span) and weigh more than 14 kg (in the spider crab Macrocheira kaempferi; McClain et al.
The Japanese spider crab, Macrocheira kaempferi, is the largest known member of the 'arthropod' family, which includes all invertebrates with jointed limbs.
The species, Macrocheira kaempferi, live up to 2,500ft down in the cold Pacific and are orange coloured with killer claws.