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    • Do indeed belong within the arachnids

      • By analyzing troves of genetic data and considering a vast number of possible ways to examine it, the scientists now have a high degree of confidence that horseshoe crabs do indeed belong within the arachnids.
      phys.org › news › 2019-03-horseshoe-crabs-relatives-spiders-scorpions

      Study confirms horseshoe crabs are really relatives of ...

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  3. www.nationalgeographic.com › animals › articleHorseshoe crabs are spider relatives, genes reveal

    Feb 27, 2019 · Bizarre horseshoe crabs are actually spider relatives. The primordial ocean dwellers are squarely situated in the arachnid family tree, scientists claim in a new study. By Nadia Drake.

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  4. en.wikipedia.org › wiki › Horseshoe_crabHorseshoe crab - Wikipedia

    Horseshoe crabs are the sister group to ricinuleids, and are within the family Arachnida, classifying them as aquatic arachnids. Their aquatic nature is the result of a secondary shift to marine life, following the initial shift to land by the common ancestor of all arachnids.

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  6. phys.org › news › 2019-03-horseshoe-crabs-relativesStudy confirms horseshoe crabs are really relatives of ...

    Mar 9, 2019 · Horseshoe crabs have been challenging to classify within the arthropods because analysis of the animals' genome has repeatedly shown them to be related to arachnids like spiders, scorpions,...

  7. www.nytimes.com › horseshoe-crabs-arachnidsAct of ‘Heresy’ Adds Horseshoe Crabs to Arachnid Family Tree

    Feb 18, 2022 · Act of ‘Heresy’ Adds Horseshoe Crabs to Arachnid Family Tree. A team of researchers say that rather than occupying their own branch in the history of life on Earth, horseshoe crabs are in...

  8. www.popularmechanics.com › science › animalsStudy: Horseshoe Crabs Really Are Arachnids, Just Like Spiders

    Feb 28, 2019 · Scientists have long known that horseshoe crabs, scientifically known as the genus Xiphosura, were related to arachnids in some way. While most arachnids live on land, a number of them live in...

  9. nationalzoo.si.edu › animals › horseshoe-crabHorseshoe crab | Smithsonian's National Zoo and Conservation ...

    Physical Description. Though it’s called a crab, horseshoe crabs are more closely related to arachnids, such as spiders and scorpions. Like those animals, horseshoe crabs have hard exoskeletons called carapaces. The hoof shape of their bodies is where they get their name.

  10. secure.nwf.org › Invertebrates › Horseshoe-CrabHorseshoe Crab | National Wildlife Federation

    ADOPT AN ANIMAL. Horseshoe Crab. Limulus polyphemus. Status: Not Listed. Classification: Invertebrate. Description. Horseshoe crabs have been around for more than 300 million years, making them even older than dinosaurs. They look like prehistoric crabs, but are actually more closely related to scorpions and spiders.

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