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- Tetrapod abstract "The superclass Tetrapoda (Ancient Greek τετραπόδηs tetrapodēs, "four-footed"), or the tetrapods, comprises the first four-limbed vertebrates and their descendants, including the living and extinct amphibians, reptiles, birds, and mammals. The tetrapods evolved from the lobe-finned fishes about 395 million years ago in the Devonian Period. The specific aquatic ancestors of the tetrapods, and the process by which land colonization occurred, remain unclear, and are areas of active research and debate among palaeontologists at present.While most species today are terrestrial, little evidence supports the idea that any of the earliest tetrapods could move about on land, as their limbs could not have held their midsections off the ground and the known trackways do not indicate they dragged their bellies around. Presumably, the tracks were made by animals walking along the bottoms of shallow bodies of water. Amphibians today generally remain semiaquatic, living the first stage of their lives as fish-like tadpoles. Several groups of tetrapods, such as the snakes and cetaceans, have lost some or all of their limbs. In addition, many tetrapods have returned to partially aquatic or fully aquatic lives throughout the history of the group (modern examples of fully aquatic tetrapods include cetaceans and sirenians). The first returns to an aquatic lifestyle may have occurred as early as the Carboniferous Period whereas other returns occurred as recently as the Cenozoic, as in cetaceans, pinnipeds, and several modern amphibians.A quadruped actually uses four limbs for locomotion; not all tetrapods are quadrupeds.".
- Tetrapod thumbnail Extant_tetrapoda.jpg?width=300.
- Tetrapod wikiPageExternalLink books?id=Z0YWn5F9sWkC&dq.
- Tetrapod wikiPageID "60560".
- Tetrapod wikiPageRevisionID "604346905".
- Tetrapod authority "authority unknown, before 1912".
- Tetrapod fossilRange "Early Devonian - Holocene,".
- Tetrapod hasPhotoCollection Tetrapod.
- Tetrapod imageCaption "Representatives of the four classes of extant tetrapods, : a frog , a hoatzin , a skink , and a mouse".
- Tetrapod imageWidth "250".
- Tetrapod name "Tetrapods".
- Tetrapod subdivision "* Class Amphibia * Series Amniota ** Clade Sauropsida ***Class Reptilia ***Class Aves ** Clade Synapsida *** Class Mammalia and see text".
- Tetrapod subdivisionRanks "Subgroups".
- Tetrapod taxon "Tetrapoda".
- Tetrapod subject Category:All_articles_with_unsourced_statements.
- Tetrapod subject Category:Body_plans.
- Tetrapod subject Category:Fossil_trackways.
- Tetrapod subject Category:Fossils.
- Tetrapod subject Category:Teleostomi.
- Tetrapod subject Category:Tetrapods.
- Tetrapod type Animal.
- Tetrapod type BiologicalLivingObject.
- Tetrapod type EukaryoticCell.
- Tetrapod comment "The superclass Tetrapoda (Ancient Greek τετραπόδηs tetrapodēs, "four-footed"), or the tetrapods, comprises the first four-limbed vertebrates and their descendants, including the living and extinct amphibians, reptiles, birds, and mammals. The tetrapods evolved from the lobe-finned fishes about 395 million years ago in the Devonian Period.".
- Tetrapod label "Czworonogi".
- Tetrapod label "Landwirbeltiere".
- Tetrapod label "Tetrapod".
- Tetrapod label "Tetrapoda".
- Tetrapod label "Tetrapoda".
- Tetrapod label "Tetrapoda".
- Tetrapod label "Tetrápodes".
- Tetrapod label "Viervoeters (biologie)".
- Tetrapod label "Четвероногие".
- Tetrapod label "رباعية الأطراف".
- Tetrapod label "四肢動物".
- Tetrapod label "四足類".
- Tetrapod sameAs Čtyřnožci.
- Tetrapod sameAs Landwirbeltiere.
- Tetrapod sameAs Τετράποδα.
- Tetrapod sameAs Tetrapoda.
- Tetrapod sameAs Tetrapoda.
- Tetrapod sameAs Tetrapoda.
- Tetrapod sameAs Tetrapoda.
- Tetrapod sameAs Tetrapoda.
- Tetrapod sameAs 四肢動物.
- Tetrapod sameAs 네발동물.
- Tetrapod sameAs Viervoeters_(biologie).
- Tetrapod sameAs Czworonogi.
- Tetrapod sameAs Tetrápodes.
- Tetrapod sameAs m.0gf_r.
- Tetrapod sameAs Q19159.
- Tetrapod sameAs Q19159.
- Tetrapod wasDerivedFrom Tetrapod?oldid=604346905.
- Tetrapod depiction Extant_tetrapoda.jpg.
- Tetrapod isPrimaryTopicOf Tetrapod.
