Takeuchi Masaki    Department   Kawasaki University of Medical Welfare  ,    Position   Associate Professor
Language	English
Title	The early embryogenesis of Polypterus (Bichirs), the most basal ray-finned fishes: insights into the origin and evolution of vertebrate body plans
Conference	2nd Joint Meeting of the French and Japanese Societies for Developmental Biology: From Cells to Organs
Conference Type	International society and overseas society
Presentation Type	Poster notice
Lecture Type	General
Publisher and common publisher	◎Takeuchi M, Takahashi M, Aizawa S
Date	2010/05/27
Venue (city and name of the country)	Paris, France
Summary	Germ layer patterning and body axis formation are central issues in vertebrate embryology that can be examined in some model animals. An intriguing question is how the mechanisms that existed in an ancestral vertebrate have been modified during vertebrate evolution. A major stream of vertebrates (Osteichthyes = bony fishes) evolved into two monophyletic lineages: Sarcopterygii, including amphibians and amniotes, and Actinopterygii (ray-finned fishes), including teleosts as the crown group. Bichir diverged from all other actinopterygians soon after this divarication. Therefore, bichir is uniquely well suited for studies assessing the ancestral state of Osteichthyes/Actinopterygii as well as understanding the divergence of embryogenesis in teleosts and amphibians.---