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(), n. pl.[NL., fr. Gr. with two breathing apertures; di- = di°s- twice + breath.] (Zol.) A group of ganoid fishes, including the living genera Ceratodus and Lepidosiren, which present the closest approximation to the Amphibia. The air bladder acts as a lung, and the nostrils open inside the mouth. See Ceratodus, and Illustration in Appendix. スポンサード リンク
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