ヤマアカガエルRana temporaria ornativentrisの背中腺の發生と形態 : および孵化の觀察

スポンサーリンク

概要

• 論文の詳細を見る

• 1.As in other anurans previously studied by myself (Yanai, '50, '51), the dorsal gland of the present subspecies is derived from the neural crest. In the early neurulae, as soon as the secondary neural folds are formed, cells of neural crest begin to thrust successively into the epidermis of the folds and of the mandibular arches as well. The cells, arriving at the latter region, give rise to a greater part of lateral branches of frontal division of the dorsal gland characteristic of the present subspecies. 2.The T-shaped glandular area containing approximately 1, 000 glandular cells is divisible into a mid-dorsal division which occupies the mid-dorsal portion of the body from the frontal end to the posterior part of the trunk, and a frontal division with its lateral branches extending from the anterior end of the mid-dorsal division of the gland to the eye-cups on both sides through the dorsal margin of the nasal pits. Whereas the glandular cells become crowded densely together before hatching, they are, after hatching, rather scattered showing their basal portion occupied by heavy mass of pigment. A number of minute vacuoles which have appeared in the cytoplasm are rarely seen to fuse together to increase in size. Aa I have reported in other anurans, the secretion of the dorsal gland which seems to play an important role in the process of hatching by softening the egg membrane, persists even in the tadpoles apparently continuing to function until degenerative changes take place rather suddenly in the late external-gill stage (12mm in length). In the 30mm-tadpoles with growing rudiments of hind limbs the dorsal gland has gone. 3.While within the egg membrane, the embryos effect two kinds of movement, rotation of the body around the vertical axis and wriggling movement, and are most restless of the embryos of the anuran species so far observed by me. The 7mm-embryos with branched external gills eventually hatch as tadpoles. My previous findings that the locomotive force effected by the epidermal cilia is responsible for pushing open the chorion and for gliding the embryo out of it, have been again confirmed in the present subspecies.

• 社団法人日本動物学会の論文
• 1952-05-15

著者

• 柳井 隆一

  島根大・文理・生物

• 柳井 隆一

  島根大學文理學部生物學教室

関連論文

• 魚類の孵化腺の発生(発生学・実験形態学)
• 異翅類の中腸上皮の二核細胞(形態学・分類学・原生動物学)
• 両棲類の前額腺の発生に及ぼすRinger氏液の影響(発生学・実験形態学)
• 兩棲類の孵化線(前額腺)(實驗形態・發生)
• シラウオの孵化腺
• イモリTriturus pyrrhogasterの前額腺(その二)
• イモリTriturus pyrrhogasterの前額腺(その一)
• ニホンアカガエルRana japonicaの背中腺
• ヤマアカガエルRana temporaria ornativentrisの背中腺の發生と形態 : および孵化の觀察
• イモリTriturus pyrrhogasterの前額腺-1・2-
• ツチガエル Rana rugosa の背中腺および孵化の觀察
• ウシガエルの背中腺 : 兩棲類孵化腺の研究第2報
• ヒキガエルBufo vulgaris formosus Boulengerの孵化腺の發生
• クロカメムシ中腸の形態および組織
• 山陰の魚類

もっと見る 閉じる

スポンサーリンク