The fourth segment of the limb (and 1st major segment), ther merus connects the ischium to the carpus. Taxonomic characters are sometimes found on the major merus.
The merus of the major cheliped, from the dorsal view of the crab. Figure modified from Crane (1975).The merus of the major cheliped, from the vental view of the crab. Figure modified from Crane (1975).
