Limuloides Explained

Limuloides is a genus of synziphosurine, a paraphyletic group of fossil chelicerate arthropods.[1] Limuloides was regarded as part of the clade Planaterga.[2] [3] [4] Fossils of the genus have been discovered in deposits of the Silurian period in the United Kingdom and potentially in the United States. Limuloides is one of the two genera of the family Bunodidae, the other being the type genus Bunodes.[5] [6] [7] Limuloides is characterized by a carapace with radiated ridges and serrated lateral regions, and an opisthosoma with rows of nodes.[8] Limuloides was once thought to have lateral compound eyes on its carapace, but later investigation did not find any evidence of it.[9]

Notes and References

  1. Bicknell. Russell D. C.. Pates. Stephen. 2020. Pictorial Atlas of Fossil and Extant Horseshoe Crabs, With Focus on Xiphosurida. Frontiers in Earth Science. en. 8. 98. 10.3389/feart.2020.00098. 2020FrEaS...8...98B. 2296-6463. free.
  2. Selden. Paul A.. Lamsdell. James C.. Qi. Liu. An unusual euchelicerate linking horseshoe crabs and eurypterids, from the Lower Devonian (Lochkovian) of Yunnan, China. Zoologica Scripta. 2015. en. 44. 6. 645–652. 10.1111/zsc.12124. 55264483. 0300-3256. free.
  3. Lamsdell. James C.. Briggs. Derek E. G.. Liu. Huaibao P.. Witzke. Brian J.. McKay. Robert M.. 2015. A new Ordovician arthropod from the Winneshiek Lagerstätte of Iowa (USA) reveals the ground plan of eurypterids and chasmataspidids. The Science of Nature. en. 102. 9–10. 63. 10.1007/s00114-015-1312-5. 26391849. 2015SciNa.102...63L. 8153035. 0028-1042.
  4. Bicknell. Russell D. C.. Lustri. Lorenzo. Brougham. Tom. 2019-12-01. Revision of "Bellinurus" carteri (Chelicerata: Xiphosura) from the Late Devonian of Pennsylvania, USA. Comptes Rendus Palevol. en. 18. 8. 967–976. 10.1016/j.crpv.2019.08.002. 1631-0683.
  5. Lamsdell. James C.. 2013. Revised systematics of Palaeozoic 'horseshoe crabs' and the myth of monophyletic Xiphosura. Zoological Journal of the Linnean Society. 167. 1. 1–27. 10.1111/j.1096-3642.2012.00874.x. 0024-4082. free.
  6. A hemiaspidan crustacean from the New York Silurian waterlimes. John Mason. Clarke. John Mason Clarke. New York State Museum Bulletin. 1924. 254. 119–120.
  7. Book: Dunlop. J. A.. World Spider Catalog. Penney. D.. Jekel. D.. Natural History Museum Bern. 2020. 1–296. A summary list of fossil spiders and their relatives. https://wsc.nmbe.ch/resources/fossils/Fossils20.5.pdf.
  8. Eldredge. Niles. Smith. LeGrande. 1974. Revision of the suborder Synziphosurina (Chelicerata, Merostomata) : with remarks on merostome phylogeny. American Museum novitates ; no. 2543. 2246/2745. en-US.
  9. Bicknell. Russell D. C.. Amati. Lisa. Ortega-Hernández. Javier. 2019-11-14. New insights into the evolution of lateral compound eyes in Palaeozoic horseshoe crabs. Zoological Journal of the Linnean Society. en. 187. 4. 1061–1077. 10.1093/zoolinnean/zlz065. 0024-4082.

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