''Grapsus longitarsis'' is a species of

crab Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tailed" in Greek language, Greek), which typically have a very short projecting tail-like abdomen#Arthropoda, abdomen, usually hidden entirely under the Thorax (arthropo ...

in the family

Grapsidae The Grapsidae are a family (biology), family of crabs known variously as marsh crabs, shore crabs, or talon crabs. The family has not been confirmed to form a monophyletic group and some Taxon, taxa may belong in other families. They are found al ...

, native to the Indo-Pacific. It was first described by

James Dwight Dana James Dwight Dana Royal Society of London, FRS FRSE (February 12, 1813 – April 14, 1895) was an American geologist, mineralogist, volcanologist, and zoologist. He made pioneering studies of mountain-building, volcano, volcanic activity, and the ...

in 1851, from a specimen found in the

Tuamotu Archipelago The Tuamotu Archipelago or the Tuamotu Islands (, officially ) are a French Polynesian chain of just under 80 islands and atolls in the southern Pacific Ocean. They constitute the largest chain of atolls in the world, extending (from northwest to ...

, French Polynesia. The basis for the decision of synonymy is Banerjee (1960). ''G. longitarsis'' is a tropical, benthic species living at depths ranging from 0–5 m in the intertidal zone. Precopulatory courtship (via smell and touch) is common and the sperm transfer is usually indirect.

References

Crustaceans described in 1825 Grapsidae {{Grapsoidea-stub