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Tulerpeton is considered one of the first "tetrapods" (in the broad sense of the word) to have evolved.It is known from a fragmented skull, the left side of the pectoral girdle, and the entire right forelimb and right hindlimb along with a few belly scales.
The evolution of tetrapods began about 400 million years ago in the Devonian Period with the earliest tetrapods evolved from lobe-finned fishes. [1] Tetrapods (under the apomorphy-based definition used on this page) are categorized as animals in the biological superclass Tetrapoda, which includes all living and extinct amphibians, reptiles, birds, and mammals.
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In effect, "tetrapod" is a name reserved solely for animals which lie among living tetrapods, so-called crown tetrapods. This is a node-based clade , a group with a common ancestry descended from a single "node" (the node being the nearest common ancestor of living species).
The Sunset Tree is the ninth studio album by the Mountain Goats, released on April 26, 2005 by 4AD.The album's songs revolve around the house John Darnielle grew up in and the people who lived there, including his mother, sister, stepfather, friends, and enemies.
Family Scaphiopodidae (American spadefoot toads) Suborder Neobatrachia. Family Allophrynidae (Tukeit Hill frog) Family Amphignathodontidae (marsupial frogs) Family Arthroleptidae (screeching frogs) Family Brachycephalidae (saddleback toads) Family Bufonidae (true toads) Family Centrolenidae (glass frogs) Family Dendrobatidae (poison dart frogs)
Stegocephali was re-established to replace the broad definition of Tetrapoda, resolving the usage of two conflicting definitions in discussions of tetrapod evolution. Stegocephali was coined in 1868 by the American paleontologist Edward Drinker Cope , who used it as a general category of prehistoric amphibians.
Greererpeton burkemorani ("crawler from Greer, West Virginia") is an extinct genus of colosteid stem-tetrapods from the Early Carboniferous period (late Viséan) of North America. Greererpeton was first described by famed vertebrate paleontologist Alfred S. Romer in 1969, based on a skull and partial skeleton from the Bluefield Formation . [ 1 ]