Juveniles may have dark-spotted carapaces and heads, with yellow around the carapace. Empty mollusc shells and crab carapaces are discarded outside the den, forming a midden. However, specimens from New Guinea and Indonesia have orange-brown carapaces and yellowish abdomens. Tasmanian cave spiders have red to brown carapaces and duller, darker brown opisthosomae. These newly emergent hatchlings are dark-colored, with heart-shaped carapaces measuring around long. Hatchlings have round carapaces about in length, and are brighter colored than the adults. Most of the fossil examples of ostracod come from the preserved carapaces, or feeding appendages. Snow crabs have equally long and wide carapaces, or protective shell-coverings, over their bodies. Their carapaces were narrower and longer (parabolic) in contrast to the trapezoidal carapaces of adults. Some Gonyleptidae individuals that produce translucid secretions have orange markings on their carapaces. Among them, the species "P. vernonensis" was erected based on two small short carapaces. Clear evolutionary trends can be observed in the carapaces of the rhenopterids. Moulted carapaces of a variety of marine malacostraceans often wash up on beaches. Carapaces were used well into the New Kingdom. Carapaces of the eastern variants are often light grey or whitish between the scutes.