Are spiders related to crabs? Study the order of arthropods with a reading selection about animal diversity. It provides details about each class within the order, as well as vivid pictures and explanatory charts. 

A description of the link between the horseshoe crab life cycle and shorebird migrations. Worth checking out for information on both kinds of organism.

This entry identifies the defining characteristics of the Limulidae, otherwise known as the horseshoe crab.

Find general information about the Merostomata class, which includes horseshoe crabs and the extinct eurypterids. Topics include diet, body charactersitics, and respiratory system.

A well-written review of the link between Horseshoe Crabs and humans through history. Includes timelines of milestone events.

The Encyclopedia of Life presents this in-depth overview of Horseshoe Crabs (Limulus polyphemus), including their habitats, size, conservation status, and much more. Images of this species and maps of its global distribution can also be...

Interesting facts and figures about horseshoe crabs, including information about mating, reproduction, pictures, and a link to the University of Delaware's page on Horseshoe Crabs.

Resource is filled with lots of information presented in an easy to follow format. Illustrations are excellent.

A thorough, easy to read, review of research into the horsehoe crab.