Местоположение издательства:New York, N.Y., United States
Первая страница:17
Последняя страница:24
Аннотация:The compound eye of the bed bug, Cimex lectularius consist about 35 ommatidia of the apposition type each with 4 crystalline cone cells, 2 primary pigment cells, 8 retinula cells and several secondary pigment cells. The dioptric apparatus of the ommatidia is made a tick biconvex corneal lens and crystalline cone of the aconic type. From the crystalline cells extend 8 cytoplasmatic processes, which pass between the retinula cells. The retinula and the rhabdom are peculiar: 6 rhabdomeres of the retinula cells form in distal region of the ommatidia a cylindric enclosing the seventh retinula cell. The eighth retinula cell is displaced in the basal region of the ommatidia. In the dark-adapted eye the ommatidia show a significant retino-motor phenomenon: a movement of the rhabdom towards the cornea, widening clear space in the cylinder of the rhabdoms, and radial movement of pigment granules in the retinula cells.