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The fiddler crab or calling crab can be one of the hundred species of semiterrestrial marine crabs in the family Ocypodidae. [2] These crabs are well known for their extreme sexual dimorphism, where the male crabs have a major claw significantly larger than their minor claw, whilst females claws are both the same size. [3]
Afruca tangeri is one of the largest species of fiddler crab, with a carapace up to 50 millimetres (2.0 in) wide, [3] and up to 25 mm (1.0 in) long. [4] The males have one claw much larger than the other, which they use for communication. [5]
Leptuca speciosa, commonly known as the brilliant fiddler crab or the longfinger fiddler crab, is a species of fiddler crab native to the southern United States, Mexico, and the Caribbean. [1] Before 2016, the species was known as Uca speciosa. In 2016, the subgenus Leptuca was promoted to the genus level. [2] [3]
Leptuca thayeri, known generally as the Atlantic mangrove fiddler crab or mangrove fiddler, is a species of true crab in the family Ocypodidae. It is distributed all across the Western Atlantic. [1] Leptuca thayeri was formerly a member of the genus Uca, but in 2016 it was placed in the genus Leptuca, a former subgenus of Uca. [2] [3] [4]
The Ocypodidae are a family of semiterrestrial crabs that includes the ghost crabs and fiddler crabs. They are found on tropical and temperate shorelines around the world. Some genera previously included in the family are now treated as members of separate families in the superfamily Ocypodoidea, such as the Dotillidae and Macrophthalmidae.
Minuca pugnax is the most common species of fiddler crab on the east coast of the United States.Its natural range extends from Cape Cod to northern Florida. [2] In 2014, its northern limit was extended to Hampton, New Hampshire, as a result of a range expansion possibly due to climate change. [3]
Leptuca deichmanni, commonly known as Deichmann's fiddler crab, is a species of fiddler crab native to the eastern Pacific coast of Central America, in Costa Rica and Panama. [ 1 ] Taxonomy
Like other fiddler crabs, Minuca minax males have one claw that is significantly larger than the other, while females have two equal-sized smaller claws. The joints on the claws are red, a noticeable feature that is the origin of the common name "redâjointed fiddler crab".