This paper contributes to what has become something of a theme, debunking various ludicrous claims of globally distributed Cambrian index species. Species of Irvingella have been abused in the same fashion as those of many agnostoid arthopod genera by fantasists championing supposed global distributions in the service of new Cambrian stages and their boundaries. This is mostly unscientific nonsense. Here we demonstrate that claims about Irvingella tropica and Irvingella angustilimbata don’t pass the laugh test, once you actually take a modern look at the material.

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