Mating has not yet been observed, but cross-fertilization is likely since cephalocarids are functional hermaphrodites. Eggs are carried on the reduced appendages of the ninth post-cephalic somite. Young hatch as a metanauplius with three fully developed head appendages (antennules, antennae, and mandibles), two rudimentary appendages (maxillules and maxillae), and three post-cephalic somites without limbs. With each successive molt, the posterior-most appendage changes form from rudimentary to fully developed and the following limb appears in rudimentary form. In addition, at each molt one or two body somites are added until all twenty post-cephalic somites are present.
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