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## Dark taxa  As desirable as data sharing is, it is not without complications. In 2011 I coined the phrase "dark taxa" (http://iphylo.blogspot.co.uk/2011/04/dark-taxa-genbank-in-post-taxonomic.html, see also \cite{Parr_2012} ) to refer to species in GenBank that lacked formal scientific names. Typically they will have a name that comprises a genus name and some combination of letters and numbers to make the name unique within GenBank (e.g., a specimen code or the first letter of the last names of the researchers that deposited the sequence). For this paper I've updated the analysis to 2015. Fig. zzz shows the percentage of dark taxa for "invertebrates" in GenBank.