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Polish Tetrapod Video

Your Inner Fish and Getting a Grip

Zachary Wurth and Haley Bloomquist

"The discovery and

description of a well-preserved fossil sarcopterygian (fleshy-limbed vertebrate) from the Middle Devonian of Nevada helps to

refine and question aspects of the temporal and anatomical framework that underpins the tetrapod condition."

-Swartz

  • Ken Ham said,"there are no transitional forms that support evolution." What are your insights about what he said? Do you agree with him? What are some things we've learned throughout the year that counter argue Ham's statement?

Polish tetrapods

Creationist View on Tiktaalik

Another creationist view on Tiktaalik

Tiktaalik was portrayed from a fish living in water to being able to emerge onto land about 375 million years ago, but the Polish tetrapods say otherwise. Footprints were discovered a year later after the Tiktaalik discovery in the Holy Cross Mountains and the rocks that the Polish footprints were found to be 397 million years old, making them 18 million years older than the Tiktaalik.

http://www.answersingenesis.org/media/audio/answers-daily/volume-106/tiktaalik-missing-link

Evolutionary Evidence on Tiktaalik

Did this creationist view change your mind on Tiktaalik? Why or why not?

"Here

we present well-preserved and securely dated tetrapod tracks from Polish marine tidal flat sediments of early Middle

Devonian (Eifelian stage) age that are approximately 18 million years older than the earliest tetrapod body fossils and 10

million years earlier than the oldest elpistostegids."

-Niedzwiedzki, Szrek, Narkiewicz, Ahlberg

Discussion

Overview of Your Inner Fish

  • Do you think Tiktaalik just any other ordinary fish or is Tiktaalik the missing link between fish and the first land animals? Why or why not?

Walking Fish?

What are some other names of fish that have shown the ability to walk?

Discovering Tiktaalik

Evolutionary Evidence for Tiktaalik to be a missing link

Pelvic girdle

  • First discovered in Canadian Arctic of the Ellesmere Island by Neil Shubin and his team members in 2004.
  • Tiktaalik shows evidences of neck, shoulder, elbow, and wrist joints.
  • Flat head with eyes on the top.
  • Displays bones and limbs such as the shoulder, elbow, wrist, and a neck.

Mudskippers

"The pelvic girdle and appendage of tetrapods is dramatically larger and more robust than that of fish and contains a number of structures that provide greater musculoskeletal support for posture and locomotion.The discovery of pelvic material of the finned elpistostegalian, Tiktaalik roseae, bridges some of these differences."

Shubin, Daeschler, Jenkins

Sources

Cobb, Matthew. "The Tracks of a Ghost." Why Evolution Is True. N.p., 7 Jan. 2010. Web. 15 Apr. 2014.

Mooney, Chris. "The Darwin Fish Is a Real Fossil, and Creationists Hate It." Slate Magazine. Climate Desk, 12 Apr. 2014. Web. 15 Apr. 2014.

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