Zyzzyxdonta alata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Endodontidae.

This is the only species in the genus Zyzzyxdonta. The genus was named Zyzzyxdonta because it has many features that are the opposite to the genus Aaadonta. The name, given to the snail by malacologist Alan Solem, is the last word in many species dictionaries, just after Zyzzyx; however, they both, in fact, precede Zyzzyzus.

They live in the Pacific islands of Palau and Fiji.

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