A tetrapod (/ ˈ t ɛ t r ə ˌ p ɒ d /; [5] from Ancient Greek τετρα-(tetra-) 'four' and πούς (poús) 'foot') is any four-limbed vertebrate animal of the superclass Tetrapoda (/ t ɛ ˈ t r æ p ə d ə /). [6]

The universal tetrapod characteristics of front limbs that bend forward from the elbow and hind limbs that bend backward from the knee can plausibly be traced to early tetrapods living in shallow water.

The word “tetrapod” means “four feet” and includes all species alive today that have four feet — but this group also includes many animals that don’t have four feet.

Mar 8, 2025 · tetrapod, (superclass Tetrapoda), a superclass of animals that includes all limbed vertebrates (backboned animals) constituting the classes Amphibia , Reptilia , Aves , Mammalia , and their direct ancestors that emerged roughly 397 million years ago during the Devonian Period.

Jul 31, 2024 · What is a tetrapod with examples. How did they evolve. Also, learn about their origin with characteristics and images.

The tetrapod clade separated from fish in the Devonian. The amniotes were the earliest to lay cleidoic eggs. The Synapsids (> mammals) and the Sauropsids (> reptiles) are sister clades, and in particular, reptiles did not give rise to mammals.

Tetrapod fossil tracks are known from the Middle Devonian (Eifelian at ca. 397 million years ago - MYA), and their earliest bony remains from the Upper Devonian (Frasnian at 375–385 MYA). Tetrapods are now generally considered to have colonized land ...

Mar 8, 2025 · Exploring the Fascinating World of Tetrapods: A Deep Dive into Five Major Groups. The term tetrapod refers to a superclass of animals characterized by having four limbs, or, more accurately, descending from ancestors that had four limbs. This incredibly diverse group encompasses a vast array of creatures, from the smallest frogs to the largest whales.

Nov 4, 2022 · Tetrapod-like vertebrates first appeared in the early Devonian period. These early "stem-tetrapods" would have been animals similar to Ichthyostega, with legs and lungs as well as gills, but still primarily aquatic and unsuited to life on land. The Devonian stem-tetrapods went through two major bottlenecks during the Late Devonian extinctions ...

4 days ago · Les tétrapodes sont issus de l'évolution des poissons sarcoptérygiens (poissons à nageoires charnues), qui ont progressivement développé des membres et des poumons afin de conquérir le milieu terrestre. Cette transition, appelée la sortie des eaux, s'est produite il y a environ 360 millions d'années, durant le Dévonien.