Starfish first appeared in the fossil record in the Cambrian. The first known asterozoans were the Somasteroidea, which exhibit characteristics of both groups. Starfish are infrequently found as fossils, possibly because their hard skeletal components separate as the animal decays. Despite this, there are a few places where accumulations of complete skeletal structures occur, fossilized in place in Lagerstätten — so-called "starfish beds". By the late Paleozoic, the crinoids and blastoids were the predominant echinoderms, and some limestones from this period are made almost entirely from fragments from these groups. In the two major extinction events that occurred during the late
Northern spiny-tailed gecko northern spiny-tailed gecko. A large amount of this species' habitat has been lost or heavily degraded by land clearing and feral invasive species including goats. Habitat degradation and loss should not be considered a major threat at this time due to the wide distribution and a large amount of suitable habitat that remains. Northern spiny-tailed gecko The northern spiny-tailed gecko ("Strophurus ciliaris") is a species of lizard in the family Diplodactylidae which is endemic to Australia. The meaning of the scientific name or binomial, "Strophurus ciliaris", comes from "strophurus" meaning "turning-tail" and "ciliaris" meaning "eyelashed", referring to the spines above