Squamates are represented by viviparous, ovoviviparous, and oviparous species. This differs from oviparous and viviparous snakes. Individuals from viviparous and oviparous populations may be hybridised, but with significant embryonic malformation. Chameleons are mostly oviparous, with some being ovoviviparous. For both oviparous and viviparous caecilians, delayed investment is a common benefit. Velvet worms are found in egg-laying (oviparous), egg-live-bearing (ovoviviparous) and live-bearing (viviparous) forms. Development is usually live birth (ovoviviparous species) but can be through eggs (oviparous). "Helostoma temminkii" are oviparous and dioecious and have external fertilization. Sauropods were oviparous (egg-laying). The oviparous species lay eggs three to six weeks after copulation. Like many reptiles, the leaf-tailed gecko is oviparous, or egg-laying. Of the oviparous teleosts, most (79 percent) do not provide parental care. This scraping method is different from the peeling actions performed by oviparous caecilians. Of the oviparous teleosts, most (79%) do not provide parental care. The newly hatched young of oviparous fish are called larvae.