Figure 5 — Moulting in chelicerate animals. A: empty moult of a tarantula, showing the carapace flipped forward. Image credit: Frosted Peppercorn (Flickr). B: Horseshoe crab carcass (right) having just emerged from the old exoskeleton on the left. Image credit: Wikimedia Commons. C. Counting from the top left, 1 and 5 are moults from living scorpions that show extension of the chelicerae and pedipalps respectively, and 2 and 6 show the same in fossil scorpion moults. 3 and 7 are carcasses of living scorpions that show retraction of the chelicerae and pedipalps respectively, while 4 and 8 show the same in fossilised scorpion carcasses. From figures 7-10 and 15-18 of McCoy & Brandt (2009).