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KMID : 0364219850280010001
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Korean Journal of Zoology
1985 Volume.28 No. 1 p.1 ~ p.8
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SEM Study of Sperm Penetration in Polyspermic Urodele Amphibian (Ambystoma mexicanum) Eggs
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Chung Hae-Moon
Malacinski George M.
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Abstract
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A series of observation on sperm penetration in urodele (Ambystoma mexicanum) eggs are reported. The whole sperm including the tail appears to penetrate the egg surface. It can be demonstrated that the Ambystoma mexicanum egg is typically polyspermic. Each sperm penetration point is marked by a distinct crater on the egg surface the so called sperm pit. Initially, no sign of disruption in the surface structure observed. Once sperm penetration was complete, the site of entry became covered with long microvilli.
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