First zoeal stages of Geograpsus lividus and Goniopsis pulchra from Panamaconfirm consistent larval characters for the subfamily Grapsinae (Crustacea : Brachyura : Grapsidae)

The first zoeal stages of Geograpsus lividus (H. Milne Edwards, 1837) and G oniopsis pulchra (Lockington, 1876), both obtained fr um laboratory hatched material in Panama, are described and illustrated. Geograpsus was one of t he few genera of Grapsinae for which larval data were unavailable. Zoeal fe atures are compared with those of other genera included in Grapsinae, and s everal shared morphological characters are established for the subfamily A combination of six characters, one of them newly recognized, seems to be di agnostic for the Grapsinae and allows recognition of planktonic material. Z oea I larvae of the eastern Pacific Goniopsis pulchra and the western Atlan tic G. cruentata (Latreille, 1803) exhibit differences in size, morphometri cs, and setation of the antennule and telson, rendering support to the taxo nomic distinction of this trans-isthmian species pair.