In 2005, we (Westrop and Palmer, in Westrop et al.) proposed the name Arcadiaspis for a new genus of eurekiid trilobite from the Jordan Sandstone of Wisconsin. We thank Jonathan Adrain, John Page, and John Paterson, all of whom pointed out that this name is preoccupied by Arcadiaspis Bognibova (in Chernysheva, 1971), a trilobite genus from the Middle Cambrian of Russia. We propose the name Wisarcadiaspis which refers to the collecting locality at Arcadia, Wisconsin, as a replacement.

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