Eyestalk ligation experiments on the fairy shrimp Streptocephalus dichotomus

The endocrine system of lower crustaceans such as anostracan also shows a similarity with that of decapod crustaceans, especially in the possession of a stalked eye in which is present the X-organ sinus gland complex (Lake, 1969). In the fairy shrimp Streptocephalus dichotomus, the sinus gland is located inbetween the lamina ganglionaris and the optic medulla. The cells in this gland show variation in their secretory contents during reproductively quiescent and reproductively active period