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The first case of symphysomely on the antennae of Cryptops Leach, 1815 (Chilopoda: Scolopendromorpha: Cryptopidae) from the Concepción (Chile) is reported. The right antenna of the specimen has a lower number of antennomeres, which are also larger than the ones from the left antenna. We discuss the possible factors affecting the appearance of this occurrence. 

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