''Leptuca helleri'', commonly known as Heller's fiddler crab, is a species of

fiddler crab The fiddler crab or calling crab can be one of the hundred species of semiterrestrial marine crabs in the family Ocypodidae. These crabs are well known for their extreme sexual dimorphism, where the male crabs have a major claw significantly l ...

endemic to the Galapagos Islands in the eastern

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

Taxonomy

Previously a member of the genus '' Uca'', the species was transferred in 2016 to the genus ''

Leptuca ''Leptuca'' is a genus of fiddler crabs belonging to the family Ocypodidae. The species of this genus are found on the coasts of the Americas. Description They are small- to large-sized crabs with an adult carapace width of 5–25 mm in adu ...

'' when ''Leptuca'' was promoted from subgenus to genus level.

Description

The

carapace A carapace is a dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the unde ...

can be up to 12 mm wide in the largest male individuals.

References

{{Taxonbar, from=Q107086598 Ocypodoidea Crustaceans of the eastern Pacific Ocean Endemic fauna of the Galápagos Islands Crustaceans described in 1902 Taxa named by Mary J. Rathbun