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The group does not seem to have diversified to the same extent in the east as they did in the west given that no diadectids are known from Russia, which has an extensive fossil record of Early and Middle Permian tetrapod assemblages.
As a very basal (primitive) tetrapod, it falls under the traditional class Amphibia in Linnaean taxonomy. Pederpes is an important fossil because it comes from the period known as Romer's gap and provides biologists with rare information about the development of tetrapods in a time when terrestrial life was rare.
The trackways are late Middle Devonian in age based on a palynological assemblage from the Valentia Slate Formation and the U-Pb radioisotopic dating of an interstratified air-fall tuff bed to ca. 385 Ma, [3] making these tetrapod trackways some of the earliest recorded, along with traces of early Middle Devonian (Eifelian) age from Poland. [4]
The white-tailed deer is the state mammal of Ohio. This list of mammals of Ohio includes a total of 70 mammal species recorded in the state of Ohio. [1] Of these, three (the American black bear, Indiana bat, and Allegheny woodrat) are listed as endangered in the state; four (the brown rat, black rat, house mouse, and wild boar) are introduced; three (the gray bat, Mexican free-tailed bat and ...
Print/export Download as PDF; Printable version; In other projects ... Pages in category "Prehistoric tetrapod orders" The following 23 pages are in this category ...
The oldest near-complete tetrapod fossils, Acanthostega and Ichthyostega, date from the second half of the Fammennian. [56] [57] Although both were essentially four-footed fish, Ichthyostega is the earliest known tetrapod that may have had the ability to pull itself onto land and drag itself forward with its forelimbs. There is no evidence that ...
A tetrapod is a form of wave-dissipating concrete block used to prevent erosion caused by weather and longshore drift, primarily to enforce coastal structures such as seawalls and breakwaters. Tetrapods are made of concrete , and use a tetrahedral shape to dissipate the force of incoming waves by allowing water to flow around rather than ...
It looked much like a stocky version of the great white shark, but was much larger with fossil lengths reaching 20.3 metres (67 ft). [10] Found in all oceans [ 11 ] it was one of the largest and most powerful predators in vertebrate history, [ 10 ] and probably had a profound impact on marine life. [ 12 ]