horseshoe crab

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Related to Limulus polyphemus: Horseshoe crabs

horseshoe crab

(hŏrs′shoo″, hŏrsh′oo krăb)
Limulus polyphemus, a species of saltwater arthropod that is a member of the Chelicerates, the subphylum containing scorpions and spiders, rather than the Crustaceans, the subphylum containing true crabs. The Limulus body structure has remained nearly unchanged for 450 million years, longer than almost any other living animal. Its blood is blue rather than red because oxygen is carried by a copper-based compound rather than hemoglobin, which is an iron-based compound; Limulus blood is used in testing drugs for bacterial contamination.
References in periodicals archive ?
Morphological variation in the horseshoe crab Limulus polyphemus.
The effect of heavy bleeding on mortality of the horseshoe crab, Limulus polyphemus, in the natural environment.
Distribution of the American horseshoe "crab," Limulus polyphemus (L.
Migrations of adult horseshoe crabs, Limulus polyphemus, in the Middle Atlantic Bight: a 17-year tagging study.
Abundance and population structure of the Atlantic horseshoe crab Limulus polyphemus in Pleasant Bay, Cape Cod.
Stage-structured matrix modeling and suggestions for management of Atlantic horseshoe crab, Limulus polyphemus, populations on Cape Cod, Massachusetts.
Epithelial immunity in a marine invertebrate: a cytolytic activity from a cuticular secretion of the American horseshoe crab, Limulus polyphemus.
Abundance of horseshoe crabs, Limulus polyphemus, in the Delaware Bay area.
Size dimorphism and the mating system in horseshoe crabs, Limulus polyphemus L.
On morphometric and serological relationships within Limulidae, with particular reference to Limulus polyphemus (L.
Distribution of the American horseshoe crab, Limulus polyphemus (L.