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Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Class: Xiphosura
Order: Xiphosurida
Family: Limulidae
Genus: Limulus
Type species
Limulus polyphemus

Limulus is a genus of horseshoe crab, with one extant species, the Atlantic horseshoe crab L. polyphemus. Many fossil species are known, many of which have since been assigned to other genera.[1]

Currently valid fossil species include:[2]

Tentative species:


  1. ^ S., Leif (1952). "Phylogeny and Taxonomy of Fossil Horseshoe Crabs". Journal of Paleontology (SEPM Society for Sedimentary Geology) 26 (4): 630–640. JSTOR 1299851. 
  2. ^ a b Dunlop, J. A., Penney, D. & Jekel, D. 2013. A summary list of fossil spiders and their relatives. In Platnick, N. I. (ed.) The world spider catalog, version 14.0 American Museum of Natural History, online at
  3. ^ Kin, Adrian; Błażejowski, Błażej (2014). "The Horseshoe Crab of the Genus Limulus: Living Fossil or Stabilomorph?". PLoS ONE 9 (10): e108036. doi:10.1371/journal.pone.0108036.