horseshoe crab

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horseshoe crab

Any of various marine arthropods of the order Xiphosurida, especially Limulus polyphemus of eastern North America, having a large rounded body and a stiff pointed tail. Also called king crab, limulus.

horseshoe crab

(Animals) any marine chelicerate arthropod of the genus Limulus, of North America and Asia, having a rounded heavily armoured body with a long pointed tail: class Merostomata. Also called: king crab

horse′shoe crab′

any of several large marine arthropods of the order Xiphosura, esp. Limulus polyphemus, of E North American shores, having a stiff tail and brown carapace curved like a horseshoe. Also called king crab.

horse·shoe crab

Any of various marine arthropods that have a large rounded shell that covers the body, two large compound eyes on the shell, and a stiff pointed tail. Horseshoe crabs are not in fact crabs, but belong to an ancient order of arthropods related to the spiders and extinct trilobites.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.horseshoe crab - large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tailhorseshoe crab - large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail; a living fossil related to the wood louse
arthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
genus Limulus, Limulus - type genus of the family Limulidae
References in periodicals archive ?
Spiders, octopuses, squids and horseshoe crabs have blue blood.
We can now explain why, for instance, horseshoe crabs have a reduced pair of limbs-the chilaria-at the back of their heads.
The author considers interactions between horseshoe crabs and humans, through fieldwork conducted between 2012 and 2016 at urban beaches near New York City, nature preserves in Japan, and marine research sites in Florida, and interviews with conservationists, field biologists, ecologists, and paleontologists.
Horseshoe crabs are the only extant chelicerates with compound eyes.
In the spring, its location offers wildlife watchers a front-row seat for the spring spectacle of spawning horseshoe crabs and migrating shorebirds, including the red knot, that depend on horseshoe crab eggs to help fuel their 9,000-mile journey.
Larry went killeying as a boy, using horseshoe crabs as bait to catch the killeys.
Selangor, Malaysia, June 22, 2015 - (ACN Newswire) - Human activity is affecting the population of Asian horseshoe crabs in the state of Sabah in Malaysia, possibly by disrupting the male to female ratio - that is the conclusion of a study that surveyed two populations of Mangrove horseshoe crab (Carcinoscorpius rotundicauda) and studied their mating behaviour.
As the group approaches, the shadows take shapes and reveal a pair of spawning horseshoe crabs.
SOUTH WELLFLEET -- Horseshoe crabs in Wellfleet Harbor will get sonic transmitters next spring to help figure out the right balance between commercial harvesting and conservation.
Along with his fellow hobbyists, Carl was on the hunt for elusive eurypterids, an extinct group of aquatic arthropods (joint-legged invertebrates) distantly related to living horseshoe crabs and scorpions.