オオサンショウウオの腺下垂体と脳室周囲器官の発生

概要

論文の詳細を見る
The development of the adenohypophysis and circusmventricular organs in the giant salamander, Andrias (=Megalobatrachus) japonicus was studied with a light microscope. The adenohypophysis appeared as a solid cell mass at stage 29. It originated from cells in the internal layer of the epidermis. Around stage 41, the adenohypophysis was connected with the endodermal dorsal wall of the pharynx by a short stalk. The embryos hatched out shortly after stage 42. After stage 49, lateral lobes proliferated laterally from the main mass of adenohypophysis. The pineal and paraphysis appeared at stage 33, the subcommissural organ at stage 35, the neurohypophysis and anterior choroid plexus at stage 39, paraventricular organ at stage 42, and posterior chord plexus at stage 49. The organum vasculosum laminae terminalis and subfornical organ had not yet differentiated in our materials up to one year-old larvae. The order of appearance of each circumventricular organ in the ontogeny of the giant salamander roughly coincided with the order of appearance of circumventricular organs in the course of phylogeny of vertebrates.
社団法人日本動物学会の論文
1983-06-25