Histological Study on the Hatching Gland Cells and the Egg Capsule in the Japanese Giant Salamander, Andrias japonicus (Temminck)

概要

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Developmental changes in hatching gland cells and the egg capsule were studied histologically in the Japanese giant salamander, Andrias japonicus. Hatching gland cells were concentrated in the frontal region of the embryos. They appeared at stage 33. The height of the cells and the amount of apically located fine granules increased towards stage 42. The granules were acidophilic and PAS-positive. Embryos hatched out shortly after stage 42. Hatching gland cells were still tall and contained abundant fine granules at stage 44. The cells became lower in height and decreased in number at stage 45. The egg capsule consisted of a thick outer layer and thin inner layer. The thickness of the capsule did not chahge strikingly during development. The surface of the outer layer was scraped off at stages around hatching
社団法人日本動物学会の論文
1983-03-25