What was so special about Tiktaalik fin?

What was so special about Tiktaalik fin?

What was so special about Tiktaalik fin?

Tiktaalik shares anatomical features with both primitive fish and the first tetrapods. At first glance, it has features we readily associate with fish: fins, scales, and gills. And it has ribs like some of the earliest tetrapods which were used to support the body and aid in living and breathing on land.

Why was Tiktaalik a significant discovery?

Its discovery sheds light on a pivotal point in the history of life on Earth: when the very first fish ventured out onto land. So, the existence of tetrapod features in a fish like Tiktaalik is significant because it marks the earliest appearance of these novel features in the fossil record.

What did the hip bone of the Tiktaalik reveal?

Tiktaalik fossils reveal how fish evolved into four-legged land animals. In work published on Monday, researchers describe fossils of the back half of Tiktaalik for the first time. The report shows that the animal had a large, robust pelvic girdle, a prominent hip joint, and long hind fins.

What did archeologist find that was very important about the Tiktaalik roseae fossils?

Summary: The discovery of well-preserved pelves and a partial pelvic fin from Tiktaalik roseae, a 375 million-year-old transitional species between fish and the first legged animals, reveals that the evolution of hind legs actually began as enhanced hind fins.

Did the Tiktaalik have lungs?

It had gills, scales, and fins like fish, along with robust rib bones and a neck like a tetrapod’s. More evidence shows that Tiktaalik had both lungs and gills. Its ribs were imbricated, helping to support the needs of lungs.

Why is Tiktaalik considered a transitional fossil?

So why is Tiktaalik referred to as a transitional creature? Its mix of characteristics of fish and of tetrapods suggest that it represents one of the moments in the transition between fish and tetrapods. them have found fossils.

Are Tiktaalik still alive?

Tiktaalik roseae, an extinct fishlike aquatic animal that lived about 380–385 million years ago (during the earliest late Devonian Period) and was a very close relative of the direct ancestors of tetrapods (four-legged land vertebrates).

How many Tiktaalik have been found?

In 2004, three fossilized Tiktaalik skeletons were discovered in the Late Devonian fluvial Fram Formation on Ellesmere Island, Nunavut, in northern Canada. Estimated ages reported at 375 MYA, 379 MYA, and 383 MYA.