horseshoe crab


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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 ?
Anatomical circuitry of lateral inhibition in the eye of the horseshoe crab, Limulus polyphemus.
Many organizations, however, are trying to encourage alternative medical practices to lessen the number of horseshoe crab lives taken by pharmaceutical companies.
It's a real challenge to try to make a local horseshoe crab fishery truly sustainable,'' McKiernan said.
Chitosan prepared from chitin of the horseshoe crab shells can be used to improve the strength properties of paper made from unbleached pulp obtained from oil palm stem.
This might sound like the start of a formidable scientific tome, but Fortey makes Horseshoe Crabs and Velvet Worms accessible--relevant, even--to the lay reader.
in horseshoe crab abundance, (62) but egg abundance continues to be
Murphy Prosomal-width-to-weight relationships in American horseshoe crabs (Limulus polyphemus): examining conversion factors used to estimate landings
Here, hundreds of horseshoe crab shells littered the pale sand.
Our friend in the hospital waits to be saved, for a net to trawl the nodes of a deep we map in one held breath: here the milky way shimmering & gasoline, here the interspecies moment between hubcap & horseshoe crab.
ABSTRACT: A trackway (Kouphichnium Nopcsa 1923) attributed to a horseshoe crab is described for the first time, from the Bloomsburg Red Beds (Silurian: Ludlow Series), of the Delaware Water Gap National Recreation Area, New Jersey.
And this summer, if I can swing it, I'll be back there again, relaxing in the sand, or perhaps passed out on the beach again like a horseshoe crab.