Asymmetron

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Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

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Did Duchess Anastasia Survive Her Family’s Execution?

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Asymmetron

invertebrate genus

Also known as: Epigonichthyes

Learn about this topic in these articles:

classification

In amphioxus
…Amphioxus) and Epigonichthyes (also called Asymmetron)—with about two dozen species. The chordate features—the notochord (or stiffening rod), gill slits, and dorsal nerve cord—appear in the larvae and persist into adulthood.
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