【摘要】 1.雄性家蝇复眼中央小网膜细胞R₇,可分成两种类型:一种小网膜细胞R_7a和另一种小网膜细胞R_7b。R_7a的细胞体、感杆和轴突较大,它与外周小网膜细胞R_1～6相同,其轴突终止在第一视神经节（薄板）;而R_7b的细胞体、感杆和轴突较小,它与中央小网膜细胞R₈相同,其轴突终止在第二视神经节（髓）。 2.雄性家蝇复眼中央小网膜细胞R_7a主要分布在复眼的背区,在腹区中较少,仅分布在第一、二排小眼中;但在雌性家蝇复眼中仅有R_7b型中央小网膜细胞。更多还原

【Abstract】 1. The central retinular cells R₇ in the compound eye of male housefly can be divided into two types which are called here R_7a and R_7b respectively. R_7a approximate many features of R_1-6 cells, which have a larger, cell body, rhabdomere and axon, terminate in the first optic neuropil （lamina）. R_7b approximate many features of R₈ cell and project directly to the second optic neuropil （medulla）. 2. The central retinular cell R_7a in the compound eye of male housefly distribute mainly the dorsal region of the eye, there are a few of R_7a in the ventral region of the eye, which only distribute in the first and second row ommatidia under equatorial line, but not found in the compound eye of female housefly.更多还原