Early embryonic development of the mayfl
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Koji Tojo; Ryuichiro Machida
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Article
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1998
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John Wiley and Sons
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English
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In the newly laid egg of the mayfly Ephemera japonica, an egg nucleus (oocyte nucleus) at metaphase of the first maturation division is in the polar plasm at the mid-ventral side of the egg, and a male pronucleus lies in the periplasm beneath a micropyle situated just opposite the polar plasm or at