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Il y a 5 jours · The Transition from Fish to Amphibians: Eusthenopteron and Acanthostega. Fossils like Eusthenopteron and Acanthostega demonstrate the evolution from fish to amphibians. They exhibit features of both fish and early tetrapods, shedding light on the transition from aquatic to terrestrial life.
Il y a 1 jour · Acanthostega is an extinct tetrapod, among the first animals to have recognizable limbs. It is a candidate for being one of the first vertebrates to be capable of coming onto land. It lacked wrists, and was generally poorly adapted for life on land. The limbs could not support the animal's weight.
Il y a 1 jour · For example, a fossilized creature called Acanthostega, dating back 365 million years, had skeletal features similar to those seen in modern salamanders. These features, such as a long body and a segmented tail, indicate a shared evolutionary history between Acanthostega and salamanders. Another piece of evidence comes from molecular studies ...
Il y a 5 jours · Acanthostega "stem-tetrapod; primarily aquatic, shallow water, internal gills, 8 digits/foot. Ichthyostega. the best known early amphibian-fish like skull still shaped like fish shoulder girdle bulky limbs muscular for walking protective ...
Il y a 2 jours · Temnospondyli. Temnospondyli (from Greek τέμνειν, temnein 'to cut' and σπόνδυλος, spondylos 'vertebra') or temnospondyls is a diverse ancient order of small to giant tetrapods —often considered primitive amphibians —that flourished worldwide during the Carboniferous, Permian and Triassic periods, with fossils being found on ...
Il y a 1 jour · Guaibasaurus. Guaibasaurus is a genus of basal saurischian from the Late Triassic Caturrita Formation, in southern Brazil. It was described in 1999 by José Bonaparte and was classified as a basal theropod. Some recent cladistic analyses place it as a basal sauropodomorph but its exact classification is still unknown.
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