Chu H M, Norris D M
Cell Tissue Res. 1976 May 13;168(3):315-24. doi: 10.1007/BF00215309.
The compound eye of male (haploid) Xyleborus ferrugineus beetles was examined with scanning and transmission electron microscopy. The eye externally consists of ca. 19 to 33 facets. Each ommatidium is composed of a thickly biconvex lenslet with about 50 electron dense and rare layers, but at the junction area between two lenslets there are only about 35 to 37 layers that can be distinguished. A very short (3.4-4.0 mum) acone type crystalline cone is located directly beneath the lenslet. Each ommatidium is surrounded by pigment cells, and pigment granules also appear throughout the cytoplasm of the retinular cells. Some pigment granules are even present below the basement membrane. there are 8 retinular cells. The rhabdomeres of 2 centrally situated photoreceptor cells fuse into a rhabdom which is enveloped by the rhabdomeres of 6 peripheral retinular cells. The rhabdomeres of the 6 peripheral retinular cells join laterally to form a rhabdomeric ring around the central rhabdom. No tracheation was observed among the retinular cells. Virus-like particles are evident near the nucleus in each Semper cell of the crystalline cone.
对雄性（单倍体）锈色长蠹甲虫的复眼进行了扫描电子显微镜和透射电子显微镜检查。该复眼外部由约19至33个小眼面组成。每个小眼由一个厚双凸透镜组成，约有50个电子致密层和稀疏层，但在两个透镜之间的交界处，只能分辨出约35至37层。一个非常短（3.4 - 4.0微米）的尖顶型晶锥直接位于透镜下方。每个小眼被色素细胞包围，色素颗粒也出现在视杆细胞的整个细胞质中。甚至在基膜下方也有一些色素颗粒。有8个视杆细胞。2个位于中央的感光细胞的视小杆融合成一个视杆，被6个外周视杆细胞的视小杆包围。6个外周视杆细胞的视小杆横向连接，在中央视杆周围形成一个视杆环。在视杆细胞中未观察到气管分布。在晶锥的每个森佩尔细胞的细胞核附近可见病毒样颗粒。
