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Are spiders and octopuses related?

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Spiders and octopuses are not closely related. They are in different phyla. Phylum is a very large taxon. Spiders are in the arthropod phylum. Octopuses are in the mollusk phylum of animals. read more

Spiders and Octopi are distantly related . Spiders belong to the arthropods, the group of invertebrate animals with jointed legs and an exoskeleton, including Spiders and their relatives (scorpions, horshoe crabs, mites), insects, crustaceans (lobsters, prawns, crabs) and centipedes and millipedes. read more

Spiders similarly are more closely related to other arthropods with a wide range of numbers of legs than to octopi. The presence of 8 legs in both groups is the result of convergent evolution (as is for example, the presence of wings in bats and birds). read more

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