A screen shot showing hierarchical comparison of a union query of Minyomerus and relevant species names including their basionyms and synonyms. Name usages declared as synonyms in data sources are displayed in shaded characters. Union query of Minyomerus and relevant species names including their basionyms and synonyms returns extra records which are unavailable without these extensions. For example, Catalogue of Life returns Minyomerus innocuus which is not included in the child name usage set of Minyomerus although its higher name usage is specified as the Minyomerus usage. It is retained as a synonym of Minyomerus microps, which suggests that Minyomerus innocuus is not included in the child name usages because it is not an accepted name but the relationship to the higher name usage is recoverable via its accepted name, Minyomerus microps. The Minyomerus innocuus in Catalogue of Life was recovered by recursive query of synonyms through Minyomerus microps and Thylacites microps which is specified as a part of the union query. There are other synonyms of Minyomerus microps shown under the Minyomerus usage of Catalogue of Life.