Sites:
| Merostomata: Brief description of the class, from the Animal Diversity Web. | | The Horseshoe Crab - Limulus polyphemus: Promotes public awareness of the four remaining species. Natural history, conservation, medical uses, education, sightings, stories, images, glossary, and bibliography. | | The Horseshoe Crab - Limulus polyphemus: Brief profile of species biology and ongoing research, with a photo. |
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