atrial pore
the opening near the anus which leads from the atrium to the exterior in Amphioxi. Also called atriopore

Dictionary of ichthyology. 2009.

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  • atriopore — ˈā.trēəˌpō(ə)r noun ( s) Etymology: atri + pore zoology : the opening of an atrium : an atrial pore (as in amphioxus) …   Useful english dictionary

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