Good find, Ted!
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We are dealing with the sciences of systematics and taxonomy. The idea behind these sciences is that they create names that are (1) not confusing, (2) equally and well understood by all scientists that make use of the terms, and (3) provide information about the evolutionary and/or morphological relationships among animals. It sounds like a good set of goals. Unfortunately, we scientists have failed on every single objective. That’s why it’s so tricky and confusing. !