Ichthyostega (ichthyostega)
Chinese name (chinese) → Ichthyostega
Other Chinese name (chinese [other]) → head salamander
Latin literature name (name) → ichthyostega
Pronunciation (pronounced) → ....
Means (meaning) → Generic name: the first fish and the salamander
Door (division) → chordata chordate door
Programme (class) → amphibia Amphibia
Head (order) → ichthyostegalia Ichthyostega Head
Branch (family) → Ichthyostega Division
Genus (genus) → ichthyostega Ichthyostega
The type species (type species) → ...
Other species (other species) → ...
Error attributable to species (misassigned species) → ...
Time (period) → Devonian about 400 million 2 thousand years ago, 8 million
Distribution (found in) → Belgium and Greenland
Found in strata (stratum) → ...
Diet (diet) → ..
Typical body length (length) → 1-3 meters long
Speculated that weight (mass) → ...
Discoverer (discoverer) → ...
Named person (first described) →
...
Introduction (brief introduction)
[A] 19 century, the Belgian found a strange fossil, at that time that the fossil fish jaw, recently identified, in fact, is an approximate and Ichthyostega (ichthyostega) is the lower jaw. The fossil is in Belgium strud, famennian late Devonian period (about 300 million 5 million 6 thousand years ago) evieux layer found. So far, Ichthyostega only in the late Devonian strata are found in Greenland, another fossil of the same family in North America, Australia, China, and found that the list is now found to increase in Belgium. In fact, Belgium and Greenland in the Devonian is a continent with only 1,500 km apart between the two.
Ichthyostega is the earliest known amphibians. Fossils found in the late Devonian strata in Greenland. Ichthyostega body of fish and amphibians showed the double feature.
Ichthyostega
This is an adventure in early vertebrates, is completely unknown to them, only partially adapt to the new environment taken the bold step. However, this progress once the air-breathing fish taken this step, quickly transformed into primitive amphibians. Since then, the evolution of vertebrate development many new possibilities on the road is developed.
So far, scientists have discovered that the earliest land vertebrates is a board called "Ichthyostega" original amphibians.
Ichthyostega skull structure of a solid, the bones on the top cover sheet and progress of the position and shape are very similar to the meat of fin fish, of course, a number of more progress. Ichthyostega physical performance of the amphibian skeletal features and a wonderful mix of fish, the spine fin fish than meat, a little progress, but retains its tail like a fish like rays. Strong shoulder strap, belt and the associated connection is fully developed fore and hind limbs that Ichthyostega can rely completely on the ground around the limbs moved.
Ichthyostega style from the beginning ancestors, amphibians (classes) in the adaptation process of differentiation of the terrestrial environment into three subclasses: subclass lost teeth, shells and smooth the vertebral body subclass subclass. |