Morphological characters based on original descriptions (Table 14) of the megalopae of 21 species among four families from the
South Atlantic. Setation data refers to numbers of setae per segment, progressing proximally to distally. Abbrevations: Mx2: maxilla;
Mxp2: maxilliped 2; Mxp3: maxilliped 3.
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Family/Species Rostrum orientation Carapace Mx1 Mx2 Mxp1 Mxp3
and morphology outgrowths endopod endopod epipod epipod
setation setation setation setation
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PINNOTHERIDAE
Clypeasterophilus stebbingi directed anteriorly smooth 1,1 2 4 26?
Dissodactylus crinitichelis absent smooth 0,4 3 4 16
Tumidotheres maculatus short three long spines 2,1 0 4 21?

GRAPSIDAE
Aratus pisonii absent dorsal spine 1,5 5 ? ?
Armases angustipes short smooth 3,4 0 7 16
Chasmagnathus granulata absent smooth 5 0 7 16
Cyclograpsus integer deflected ventrally smooth 6 2 9 ca.35
Cyrtograpsus angulatus short, deflected ventrally smooth 1,3 0 7 22
Cyrtograpsus altimanus deflected ventrally smooth 6 2 8 35
Metasesarma rubripes short smooth 2,3 0 7 20
Pachygrapsus transversus short, deflected ventrally smooth 0 0 12-14 40+
Percnon gibbesi trifid smooth ? ? ? ?
Sesarma rectum short protuberances 1,5 0 5 15

GECARCINIDAE
Cardisoma guanhumi deflected ventrally smooth 2,4 6 9 25

OCYPODIDAE
Ocypode quadrata deflected ventrally smooth 3 7 ca.20 ca.54
Uca burgersi deflected ventrally smooth 1,2 2 7 17
Uca mordax deflected ventrally smooth 1,1 0 6 19
Uca thayeri deflected ventrally smooth 0,4 0 7 16
Uca uruguayensis deflected ventrally smooth 2 0 6(7) ca.19
Uca vocator deflected ventrally smooth 0,1 2 5 13
Ucides cordatus deflected ventrally smooth 0,5 6 10 32
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