The Horseshoe Crab of the Genus Limulus: Living Fossil or Stabilomorph?

  title={The Horseshoe Crab of the Genus Limulus: Living Fossil or Stabilomorph?},
  author={Adrian Kin and Błażej Błażejowski},
  journal={PLoS ONE},
A new horseshoe crab species, Limulus darwini, is described from the uppermost Jurassic (ca. 148 Ma) near-shore sediments of the Kcynia Formation, central Poland. The only extant species Limulus polyphemus (Linnaeus) inhabits brackish-marine, shallow water environments of the east coast of the United States. Here it is shown that there are no important morphological differences between the Kcynia Formation specimens and extant juvenile representatives of the genus Limulus. The palaeoecological… 

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