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- W2067791607 abstract "In Korscheltellus lupulinus (Lepidoptera : Hepialidae), both eusperm and parasperm can be found, whereas Micropterix calthella (Lepidoptera : Micropterigidae) produces only eusperm. The eupyrene sperm in K. lupulinus is 250 μm long. Spermatozoa found in K. lupulinus are very similar to those found in higher Lepidoptera, but the eusperm of M. calthella do not possess similar features. As in other Lepidoptera, the axoneme pattern of K. lupulinus is 9 + 9 + 2. Anteriorly, the axoneme is replaced by a fibrous stem similar to an acrosomal structure; posteriorly it becomes progressively uneven. The sperm of K. lupulinus has other original features. The anterior region of the sperm is rigid and contains the nucleus, which has a longitudinal groove adjacent to the axoneme. The 2 mitochondrial derivatives extend from the posterior end of the nucleus. There are no accessory bodies. Many peripheral cytoplasmic vesicles are present. A thin sheath surrounds the cell. It is thick in the parasperm and made of concentric or spiralling lamellae; it does not have any lacinate appendages. The axoneme of the sperm of M. calthella extends over the entire length of the cell and spirals in a helix around the nucleus. The nucleus is also almost as long as the cell. The 2 mitochondrial derivatives, flanked by accessory bodies, follow this spiralling. The axoneme has a 9 + 2 pattern. The plane, which contains the 2 central microtubules, is at an angle with the median plane of the nucleus." @default.
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- W2067791607 date "1992-04-01" @default.
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- W2067791607 title "Ultrastructural analysis of spermatozoa of Korscheltell us lupulinus L. (Lepidoptera : Hepialidae) and Micropterix calthella L. (Lepidoptera : Micropterigidae)" @default.
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- W2067791607 doi "https://doi.org/10.1016/0020-7322(92)90013-d" @default.
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