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 ?
Scientists have named a 245,000 million-year-old horseshoe crab fossil after Darth Vader, because of its striking similarity to the film villain.
Catch and Release: The Enduring yet Vulnerable Horseshoe Crab
The American horseshoe crab Limulus polyphemus (Linnaeus, 1758) has a long history in vision science beginning in the 1930s (Hartline and Grahm, 1932).
Year after year, people come to the First State to observe the federally threatened Red Knot shorebird, which stops along the Delaware Bay to refuel on horseshoe crab eggs along its amazing 9,000-mile migration journey.
In the islet called Splash, we stop to feed the fish, look at the horseshoe crab, endangered species known for its medicinal values, and be entertained by a dive act.
There is a range of tests available for detecting endotoxins including the Rabbit Pyrogen Test (RPT) and tests based on Limulus Amebocyte Lysate (LAL), which is derived from the blood cells of the horseshoe crab.
The blue lobster is warned by another darker lobster that the horseshoe crab is not his claw thief.
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.
There are four horseshoe crab species (one of which is native to the United States) that have survived several mass extinction events.
The sanctuary has done annual horseshoe crab spawning surveys since 1999 as part of a statewide effort but questions about the harbor's total crab population continue.
Perhaps some of you might even remember the first such trip where you saw the distinctive form of a horseshoe crab (photo).
For instance, the enormity of evolution is presented simply, but the familiar horseshoe crab becomes a complicated subject.