Abstract
The present study deals with the juvenile morphology of Clibanarius sclopetarius (Herbst, 1796) reared in the laboratory. Ovigerous females were collected in intertidal and shallow estuarine waters at Sao Sebastiao on the northern coast of the state of Sao Paulo, Brazil. Hermit crabs were maintained in filtered sea water in a climatically controlled room at 25 ± 2°C until hatching. Larvae were cultured individually with nauplii of Artemia salina as food. Ten or more crab instars after megalopa were obtained, of which five were studied intensely and their most representative structures illustrated and described. The developmental period of C. sclopetarius until the fifth juvenile crab instar was completed in 171 days (mean value) from hatching. Sexual dimorphism was evidenced by the appearance of secondary sexual characteristics in the fifth juvenile instar.
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