Behavioral-convergence
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Leptuca thayeri
Atlantic mangrove fiddler crab, mangrove fiddler
Leptuca thayeri is a true crab in the family Ocypodidae, commonly known as the Atlantic mangrove fiddler crab. Formerly classified in the genus Uca, it was moved to Leptuca in 2016 based on phylogenetic revisions. The species inhabits mangrove sediments along the Western Atlantic coast, where it constructs burrows and influences sediment structure through bioturbation. Males possess one greatly enlarged claw used for display and combat. The species exhibits a resource-free mating system, an unusual reproductive strategy among fiddler crabs.