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Atlantic horseshoe crab

Atlantic horseshoe crab
Limulus polyphemus (aq.).jpg
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Merostomata
Order: Xiphosura
Family: Limulidae
Genus: Limulus
O. F. Müller, 1785
Species: L. polyphemus
Binomial name
Limulus polyphemus
(Linnaeus, 1758)
Synonyms

Monoculus polyphemus Linnaeus, 1758

External video
Limulus polyphemus horseshue crab on coast.jpg
Rendezvous with a Horseshoe Crab, August 2011, 4:34, NewsWorks
The Horseshoe Crab Spawn, June 2010, 5:08, HostOurCoast.com
Horseshoe Crabs Mate in Massive Beach "Orgy", June 2014, 3:29, National Geographic

Monoculus polyphemus Linnaeus, 1758

The Atlantic horseshoe crab (Limulus polyphemus) is a marine chelicerate arthropod. Despite its name, it is more closely related to spiders, ticks, and scorpions than to crabs.Horseshoe crabs are most commonly found in the Gulf of Mexico and along the northern Atlantic coast of North America. A main area of annual migration is Delaware Bay, although stray individuals are occasionally found in Europe.

The other three extant species in the family Limulidae are also called horseshoe crabs. These are Tachypleus tridentatus, Tachypleus gigas and Carcinoscorpius rotundicauda, which all are restricted to Asia. All four are quite similar in form and behavior.

This group of animals is also known as horsefoot, or saucepan. Some people call the horseshoe crab a "helmet crab", but this common name is more frequently applied to a true crab, a malacostracan, of the species Telmessus cheiragonus. The term "king crab" is sometimes used for horseshoe crabs, but it is more usually applied to a group of decapod crustaceans.

Limulus means "askew" and polyphemus refers to the giant in Greek mythology. It is based on the misconception that the animal had a single eye.

Former scientific names include Limulus cyclops, Xiphosura americana, and Polyphemus occidentalis.


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