Invertebrates
Diversity of forms in invertebrates.

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Invertebrates
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Gen. et sp. indet.
Decapoda, Ocypodidae
Male.
Brasil, Rio Grande do Norte, Baía Formosa.
11/27/2011
IS007'01-111127106'JJK
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The genus Uca and related genera show strong sexual dimorphism manifested by extensive development of one of male's claws. Large claw, that represents almost a half of body weight, is used for territorial fighting and for a waving display.