Altictalak


Arctic fossil was discovered fossil called Ptictalak, Rosset Tiktaalik Roseae, a transitional fossils and fossil shows clearly how they have evolved some fish to wild animals. Scientists believe that the animal can be to represent one of the most important wildlife grandparents when he began to get out of the water to dry land.

Cold winds and low temperatures and frozen blocks huge Almndjemdh and the ongoing environmental threats to polar bears prompted a group of three scientists research trip in the area and discovered the great chance discovery in their lives. Polar region which they discussed is an island Ollsmirh the Canadian Ellesmere and this area was dominated by 383 million years ago subtropical weather and a nice heat. This area was located in the mass of the earth (continent) Alawroamrakih the (then America were linked geographically in Europe) in the Devonian Devonian period, and this area was located in that period near the equator.

That area at that time was full of small, winding rivers and canals and shallow that environment was perfect for the fish reluctant to crawl to land this is what scientists say three Ted Deichlr the Ted Daeschler and Nile Shubin Neil Shubin and Varc Jenkins the Farish Jenkins. Began their mission in 1999, and so far they found hundreds of remains of the bones in the rocks is frozen, but the discovery featured was in 2004 when they found three models of fossils that were in the transitional phases of the evolution of fish and wildlife, the name of this animal is Tiktaalik Roseae تيكتاليك Russian and name comes of the local language there in Alanoccycock language Inuktikuk means a big fish in shallow water.

Models of this animal discovered vary in length ranges from 1.5 meters to 3 meters. This animal has a triangular head Oblate such as alligator, flat and broad body reminds us of the animals that walk on four. His body indoor Baharashv (such as fish) and has fins and the lower jaw, as in the rest of the fish, but the rest of his body anatomies to indicate that this animal was busy crawls ashore.



This animal was able rotation of the head and shoulders separately from each other, which gave him more in the field of freedom of movement. At the head is associated fish shoulder to closely and there is no neck of the fish so if the fish ran her moves with her entire body. Ribs (rib cage) Show than in normal fish and be compact in line to each other so gaining body strength and hardness more to be able to without the help of the one that comes out of the water and crawl on land. As well as the shape of his ear, much like the middle ear wild animals that walk on four.

Was busy crawls ashore is fins bra, every fin consists of a small group of bones of the joints are subject to the movement of almost similar to what exists in the legs of the animals that walk on four. Scientists Tkmenoa the easily distinguish between the shoulder and elbow Elbow and wrist primitive. As a result of all this could be based on thoracic fins crawl. By slightly curved shoulder, elbow and limbs (fingers) being able to put it flat on the ground and in this way enables تيكتاليك to crawl at the bottom of the shallow water as well as crawl on land and this is confirmed by the head of stainless turnover and strong rib cage.

 Has the qualities of fish and other qualities of the animals that walk on four. We call a fish with feet analogy this is what the world Nile Shubin of the University of Chicago in the presentation of news for his discoveries. Is not the only animal finder and who walks on four, but there are another animal before 385 million years ago now and called Bandrichtheis the Panderichthys this animal was able to crawl on the bottom of shallow water mud by thoracic Zhanfe but it was what still hydraulically animal.

 Is not the missing link in evolution because the term missing link is scientifically valid because it suggests that there is one missing fossil fill the void with the knowledge that there are a series of fossils interfaces must occur between the fish and wildlife walks on four. We can say what fills the gap (10 million years) between the first a Panderichthys creeping fish and the first wild animal walks on four. And oldest remaining Ahaverha the origin due to 376 million years ago now.     

Popular posts from this blog

Spotted handfish

London Zoo

Koala