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Systems This category is within the scope of WikiProject Systems, which collaborates on articles related to systems and systems science.SystemsWikipedia:WikiProject SystemsTemplate:WikiProject SystemsSystems articles This category is not associated with a particular field. Fields are listed on the template page. Biology Incertae sedis is part of the WikiProject Biology, an effort to build a comprehensive and detailed guide to biology on Wikipedia. Leave messages on the WikiProject talk page.BiologyWikipedia:WikiProject BiologyTemplate:WikiProject BiologyBiology articles Evolutionary biology This category is part of WikiProject Evolutionary biology, an attempt at building a useful set of articles on evolutionary biology and its associated subfields such as population genetics, quantitative genetics, molecular evolution, phylogenetics, and evolutionary developmental biology. It is distinct from the WikiProject Tree of Life in that it attempts to cover patterns, process and theory rather than systematics and taxonomy. If you would like to participate, there are some suggestions on this page (see also Wikipedia:Contributing FAQ for more information) or visit WikiProject Evolutionary biologyEvolutionary biologyWikipedia:WikiProject Evolutionary biologyTemplate:WikiProject Evolutionary biologyEvolutionary biology articles Viruses This category is within the scope of WikiProject Viruses, a collaborative effort to improve the coverage of viruses on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.VirusesWikipedia:WikiProject VirusesTemplate:WikiProject Virusesvirus articles Tree of Life This category is within the scope of WikiProject Tree of Life, a collaborative effort to improve the coverage of taxonomy and the phylogenetic tree of life on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.Tree of LifeWikipedia:WikiProject Tree of LifeTemplate:WikiProject Tree of Lifetaxonomic articles

This category lumps organisms of uncertain relationship. It suggests that what is categorized here somehow belongs together. This is a misconception. You can have an ape of uncertain affinity, but it needs to be categorized as an ape, or a mammal of uncertain affinity, but it needs to be categorized as a mammal, a vertebrate of uncertain affinity, and it needs to be categorized as a vertebrate, or a deuterostomate, or an animal. - Dwergenpaartje ( talk) 23:03, 28 December 2013 (UTC) reply