(n.) The primitive form of fin, like that of Ceratodus.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). archipterygium. Retrieved September 23, 2026, from http://smartdefine.org/archipterygium/definitions/1975591 |
| Chicago | Webster's. 2011. "archipterygium" http://smartdefine.org/archipterygium/definitions/1975591 (accessed September 23, 2026). |
| Harvard | Webster's 2011, archipterygium, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/archipterygium/definitions/1975591>. |
| MLA | Webster's. "archipterygium" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/archipterygium/definitions/1975591> |