✍ Scribed by Hans Nüesch
No coin nor oath required. For personal study only.
The development of the Malpighian tubules is studied in Cloeon dipterum through all stages from the youngest larva to the adult. The Malpighian tubules are found to be outgrowths of the posterior part of the endodermal midgut and not of the ectodermal hindgut. In the adult the part of the intestine with the tubule openings becomes separated by an ingrowing fold of the epithelium from the anterior main part of the midgut that forms a large thin-walled and air-filled bladder. The characteristics of the developmental stages, which served to determine the age of the animals, are given.
📜 SIMILAR VOLUMES
## Abstract The tubules vary in number from about 190 to 300. They gather into twelve groups each consisting of an anterior and a posterior division and each emptying into one of twelve ampullae arranged equi‐distant from each other about the wall of the posterior mid‐gut and in a transverse plane
## Abstract The ultrastructure of scalariform junctions in the Malpighian tubules of the hemipteran __Rhodnius prolixus__ and the dipteran __Aedes taeniorhynchus__ is described. Both autocellular and intercellular scalariform junctions are illustrated. This is the first report of scalariform juncti