Note On Differentiating The Species
Both Trivia arctica and Trivia monacha were considered to be two forms of the same species until 1925, when A. J. Peile published a paper in the Proceedings of the Malacological Society differentiating the two. It is now known that the larvae of the two species are readily distinguishable.
The Linnaean name Trivia europea, now lapsed, referred to the supposed single species. Linnaeus himself mentioned two kinds: Cypraea europea and Cypraea anglica, but these terms were intended as a geographical distinction, and are not accepted as species names today.
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