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Há 3 dias · Hatteria. (Gray, 1842) (rejected name) Rhynchocephalus. ( Owen, 1845) (rejected name) The tuatara ( Sphenodon punctatus) is a species of reptile endemic to New Zealand. Despite its close resemblance to lizards, it is part of a distinct lineage, the order Rhynchocephalia. [8] The name tuatara is derived from the Māori language and means "peaks ...
Há 2 dias · Like all other squamates, snakes are ectothermic, amniote vertebrates covered in overlapping scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads ( cranial kinesis ).
Há 1 dia · As amniotes, reptile eggs are surrounded by membranes for protection and transport, which adapt them to reproduction on dry land. Many of the viviparous species feed their fetuses through various forms of placenta analogous to those of mammals, with some providing initial care for their hatchlings.
Há 2 dias · Today, this notion has been discarded and a consensus exists that ichthyosaurs are amniote tetrapods, having descended from terrestrial egg-laying amniotes during the late Permian or the earliest Triassic.
Há 2 dias · A mammal (from Latin mamma 'breast') [1] is a vertebrate animal of the class Mammalia ( / məˈmeɪli.ə / ). Mammals are characterized by the presence of milk -producing mammary glands for feeding their young, a neocortex region of the brain, fur or hair, and three middle ear bones.
Há 4 dias · Within a few million years, two important amniote lineages became distinct: synapsids, from which mammals are descended, and sauropsids, from which lizards, snakes, turtles/tortoises, crocodilians, dinosaurs, and birds are descended. [2]
Há 1 dia · Largest and heaviest animals. Clockwise from top left: an African bush elephant, the largest extant terrestrial animal; a blue whale, the largest extant animal; and a colossal squid, the largest invertebrate. The largest animal currently alive is the blue whale.
