A cytoplasmic organelle in adenohypophysial cells of the vole, Microtus agrestis.
D000818:Animals; D003594:Cytoplasmic Granules; D004721:Endoplasmic Reticulum; D006056:Golgi Apparatus; D010902:Pituitary Gland / Q000166:cytology*; D012377:Rodentia / Q000033:anatomy & histology*