Spider are apparently absent. In some species, the exocuticle of the legs and prosoma is modified by a tanning process, resulting in brown coloration. Bilins are found, for example, in "Micrommata virescens", resulting in its green color. Guanine is responsible for the white markings of the European garden spider "Araneus diadematus". It is in many species accumulated in specialized cells called guanocytes. In genera such as "Tetragnatha", "Leucauge", "Argyrodes" or "Theridiosoma", guanine creates their silvery appearance. While guanine is originally an end-product of protein metabolism, its excretion can be blocked in spiders, leading to an increase in its storage. Structural colors
Paradise garden Paradise garden The paradise garden is a form of garden of Old Iranian origin, specifically Achaemenid. Originally denominated by a single noun denoting "a walled-in compound or garden", from ""pairi"" ("around") and ""daeza"" or ""diz"" ("wall", "brick", or "shape"), Xenophon Grecized the Persian phrase ""pairi-daeza"" into ""paradeisos"". The idea of the enclosed garden is often referred to as the paradise garden because of additional Indo-European connotations of "paradise". The essential qualities of the paradise garden derive from its original, arid or semi-arid homeland. The fundamental quality is enclosure of the cultivated area, which excludes the wildness of nature and includes