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1 de mai. de 2024 · 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.
Há 1 dia · 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 · 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 4 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.
17 de abr. de 2024 · Researchers identify molecular basis for morphological diversity of amniote skull. Dec 12, 2023. Autism-linked gene, if deleted, results in less myelin. Dec 21, 2021.
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Há 1 dia · Development. Function. Clinical significance. Society and culture. Other animals. Additional images. See also. Notes. References. External links. Clitoris. In amniotes, the clitoris ( / ˈklɪtərɪs / ⓘ KLIT-ər-iss or / klɪˈtɔːrɪs / ⓘ klih-TOR-iss; pl.: clitorises or clitorides) is a female sex organ. [1] .
Há 2 dias · 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.
