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For those arthropods with antennae, they will appear on the head. The location and count depends on the subphylum or group; for trilobites, hexapods (including insects) and myriapods they are located on the first body segment; for crustaceans which have two pairs they are located on the first and second body segments, with the smaller pair called antennules. Arachnids including Spiders and scorpions have no antennae.

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11y ago

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