Taxonomy

Limulus polyphemus Linnaeus, 1758. OTHER COMMON NAMES

English: Atlantic horseshoe crab, horseshoe crab, king crab. PHYSICAL CHARACTERISTICS

The American horseshoe crab is a large species. Males are smaller than females. Mean body length is approximately 14 in (35.7 cm) for males and 17 in (43.8 cm) for females. The edge of the carapace is domed. The prosomatic carapace forms a circular arch, whereas the opisthosomatic carapace is hexagonal and elongated toward the posterior of the body. This species has large compound eyes. The American horseshoe crab is greenish brown to blackish brown.

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