 P. schultzi exuviae ( discarded " skins " ) have been found both in their own webs and in those of I. karschi , which has suggested that P. schultzi moults in the open . In one case , while its new skin was still pale and soft , its spinnerets were still stuck in the discarded skin , and the spider slowly twirled for about 90 seconds until it was free . The spider 's body then darkened quickly to the normal colouration , and some time later the spider hung in its usual upside @-@ down posture in the web . : 35 
