File:Limulus polyphemus (Atlantic horseshoe crab) (Sanibel Island, Florida, USA) 7.jpg

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English: Limulus polyphemus (Linnaeus, 1758) - Atlantic horseshoe crab in Florida, USA. (March 2014)

This is the only living species of Limulus. Several fossil species have been reported from the Mesozoic and Cenozoic. Limulus horseshoe crabs are not true crabs, which are decapod crustaceans. Horseshoe crabs are xiphosuran chelicerates. The exoskeleton is tripartite, consisting of a semicircular cephalon (head), also called the prosoma, a subtriangular opisthosoma that is bordered by a series of spines, and a large posterior spine called a telson.

Classification: Animalia, Arthropoda, Chelicerata, Merostomata, Xiphosura, Limulidae

Locality: Ding Darling National Wildlife Refuge, Sanibel Island, southwestern Florida, USA
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Source https://www.flickr.com/photos/jsjgeology/24270509669/
Author James St. John

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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/24270509669. It was reviewed on 10 May 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

10 May 2022

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current18:10, 10 May 2022Thumbnail for version as of 18:10, 10 May 20223,694 × 1,954 (3.28 MB)Qohelet12 (talk | contribs)Uploaded a work by James St. John from https://www.flickr.com/photos/jsjgeology/24270509669/ with UploadWizard

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