Acanthostega
04_Acan_flesh_reconstruct.JPG
Acanthostega gunnari (Jarvik 1952) adalah genera tetrapoda purba dari Devon atas, yang menjadi transisi antara kenampakan tetrapoda dengan evolusi tangan berjari(Coates and Clack 1990, Clack and Coates 1995, Gould 1991, Pough et al. 1996, Thomson 1993, Zimmer 1995, Clack 2002a). Acanthostega disajikan dengan bahan yang sangat terlestarikan. Fitur nyata adalah lengkung insang dan lamina post branchial, insang dalam; lengan mirip kayuh dengan delapan jari tiap tangan dan ekor panjang berujung sirip dan dukungan asesori internal. (Coates 1996). Ditemukan oleh kelompok Celsius Bjerg di Greenland timur, berasal dari 360 juta tahun lalu.
Bibliography
2. Clack, J.A. 1994b. Earliest known tetrapod braincase and the evolution of the stapes and fenestra ovalis. Nature, 369: 392-394
3. Per E. Ahlberg, Jennifer A. Clack, Ervins Luksevics, Henning Blom, Ivars Zupins. Ventastega curonica and the origin of tetrapod morphology. Nature, 2008; 453 (7199): 1199 DOI: 10.1038/nature06991
4. Clack, J. A.2002a Gaining ground: the origin and evolution of tetrapods. Indiana University Press, Bloomington, Indiana, USA. 369pp
5. Harvard University (2007, April 17). Ancient Amphibians Evolved A Bite Before Migrating To Dry Land. ScienceDaily. Retrieved January 10, 2009, from http://www.sciencedaily.com­ /releases/2007/04/070416193322.htm
6. Clack, J. A. 2003 A revised reconstruction of the dermal skull roof of Acanthostega, an early tetrapod from the Late Devonian. Trans R. Soc. Ed. Earth Sciences: 93, 163-165
7. Coates, M.I. (1996). The Devonian tetrapod Acanthostega gunnari Jarvik: postcranial anatomy, basal tetrapod interrelationships and patterns of skeletal evolution. Transactions of the Royal Society of Edinburgh; Earth Sciences, 87, 363-421.

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