Abstract
The larval development of the porcellanid crab Petrolisthes granulosus (Guérin, 1835) was carried out under laboratory conditions (15―16°C, 34.4 S). The complete development consists of a prezoeal stage, two zoeal stages, and a megalopal stage. The megalopa appeared after 26 days. All larval stages as well as the setation of appendages are described and illustrated. The zoeae of P. granulosus have affinity with P. platymerus, an eastern North Pacific Petrolisthes, and also have affinity with P. lamarckii, an Indo-west Pacific Petrolisthes, but can be distinguished from both of these species of Petrolisthes by several morphological characteristics. The larvae of P. granulosus are compared and discussed in relation to other Petrolisthes described by previous authors.
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