Larvae of the scyllarid lobster known previously as Scyllarus nearctus Holthuis were hatched in the laboratory and were reared through seven stages to an intermediate phase of development. Later phyllosomas were obtained from plankton to complete the series of larval stages.
Postlarvae were obtained through metamorphosis in the laboratory of final-stage phyllosomas captured in plankton. The complete sequence of phyllosoma stages and the postlarva are described and illustrated. The larval life consists of nine or ten phyllosoma stages, with a minimum total duration
estimated to be 2.5 months at water temperatures near 25°C. Larvae at all stages can be readily distinguished from those of the western Atlantic species S. americanus, S. chacei, and S. planorbis. They closely resemble larvae of the eastern Atlantic S. arctus. The
immature scyllarid lobster described as Arctus depressus by Smith (1881) proves to be a postlarval stage of this species, which should henceforth be known as Scyllarus depressus (Smith, 1881).
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