This paper describes the relationship between the arrangement of dermal chromatophores in tokay gecko (Gekko gecko) skin and the formation of wild-type colouration, with emphasis on the ultrastructure of chromatophores. The samples of the tokay gecko skin were collected from wild-type colouration adult specimens. Morphology and distribution of chromatophores was determined by using light microscopy and transmission electron microscopy. The present study revealed that orange/red coloured skin of G. gecko contained erythrophores, which were located under basement membrane, and usually comprised deeper situated iridophores and melanophores which were form single layer with iridophores or were occupying the deepest region of dermis. In orange/red coloured skin, erythrophores were the predominant chromatophores. However in blue areas these cells occurred in small numbers or were not noticed at all. In blue pigmented areas predominated iridophores and melanophores. Iridophores were found just under basement membrane, but this superficial location of iridophores occured only in areas without erythrophores. Distribution of erythrophores, melanophores, and iridophores determines the characteristic blue colour of the tokay gecko skin with orange/red dots on the whole body.

中文翻译：

---

Tokay Gecko (Gekko gecko) (Linnaeus, 1758) 皮肤外皮色素细胞的组织学和超微结构

本文描述了壁虎（Gekko gecko）皮肤中真皮色素细胞的排列与野生型着色形成之间的关系，重点是色素细胞的超微结构。Tokay 壁虎皮肤的样本是从野生型着色成年标本中收集的。通过使用光学显微镜和透射电子显微镜测定色素团的形态和分布。目前的研究表明，G. gecko 的橙色/红色皮肤含有位于基底膜下的红细胞，通常包括位于更深的虹膜细胞和黑色素细胞，它们与虹膜细胞形成单层或占据真皮的最深区域。在橙色/红色皮肤中，红细胞是主要的色素细胞。然而，在蓝色区域，这些细胞数量很少或根本没有被注意到。在蓝色色素区主要是虹彩细胞和黑素细胞。在基底膜下发现了虹膜细胞，但虹膜细胞的这种表面位置仅出现在没有红细胞膜的区域。红细胞、黑素细胞和虹膜细胞的分布决定了tokay 壁虎皮肤特有的蓝色，全身带有橙色/红色斑点。