Zygobranchia

• (n. pl.) A division of marine gastropods in which the gills are developed on both sides of the body and the renal organs are also paired. The abalone (Haliotis) and the keyhole limpet (Fissurella) are examples.
Found on http://thinkexist.com/dictionary/meaning/zygobranchia/

Zygobranchia

Zyg`o·bran'chi·a noun plural [ New Latin , from Greek zygo`n a yoke + ... a gill.] (Zoology) A division of marine gastropods in which the gills are developed on both sides of the body and the renal organs are also paired. The abalone ( Haliotis ) and the keyhole limpet (
Found on http://www.encyclo.co.uk/webster/Z/7
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