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| протоцефалоны (1 the parts of an insect embryo that consist of the prostomium and the first postoral somite; 2 primitive arthropod heads corresponding to the sensory as distinguished from the feeding portion of the head of higher forms) | |||
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| протоцефалоны (1 the parts of an insect embryo that consist of the prostomium and the first postoral somite; 2 primitive arthropod heads corresponding to the sensory as distinguished from the feeding portion of the head of higher forms) | |||