Embryonic Development of Alimentary Canal in the Primitive Moth, Endoclita signifer WALKER (Lepidoptera, Hepialidae)

概要

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The formation of alimentary canal in the embryo of the monotrysian moth, Endoclita signifer, is described in reference to other Lepidoptera and Trichoptera. The stomodaeum is formed as an invagination at the medio-posterior portion of the cephalic regions of the embryo. After revolution, paired longitudinal folds like a conduit arise from the inner wall of the stomodaeum along its ventro-midline. Such a strange structure has never been known in other insect embryos. The proctodaeum arises asan extension of the amnio-proctodaeal cavity, i.e., the dorsal proctodaeal wall originates from the amnion and the ventral one from the posterior region of the telson. The mid-gut epithelium originates exclusively from the anlage arising from the blind end of the stomodaeum, thus belonging to the unipolar formation which is uncommon in insects. Malpighian tubules arise as three pairs of evaginations from the blind end of the proctodaeum.
日本昆虫学会の論文
1981-12-25