甲殻類十脚目の眼柄内にある微小神経膠分泌器官

概要

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A minute gliosecretory organ (M-organ) is found on the ventral side of the proximal part of the medulla interna in the eyestalk of a crab. M-organ is a spindle-shaped minute organ which is composed of slender neuroglia cells. Each glia cell has an ellipsoid nucleus and chromophobic cytoplasm. A few granules of GHP positive and AF positive stainability are observed in the pale cytoplasm of the slender cells. A colloidal mass of the same stainability as that of granules is found at the central portion of the organ. The colloidal mass is supposed to be a secretory product of the glia cells of the M-organ and it seems to be discharged into the tissue spaces near the organ. The M-organ is observed in the eyestalk of all studied species of Reptantia, 8 species of Brachyura, 3 species of Anomura, 1 species of Astacura and 1 species of Palinura, but is not found in Natantia, 4 species of shrimps and prawns.
社団法人日本動物学会の論文
1970-05-15