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External organs of the tick, Amblyomma testudinarium. (A) The scutum showing beautiful ornamentation with dark-brown or brownish-black markings on a pale yellow background, the eyes not protruding and the capitulum having the long and slender pedipalp. (B) The genital aperture. (C) The anus embraced by groove posteriorly. (D) The spiracular plate, comma-shaped.
