sentence: Regular taxa are supposed to be monophyletic.
sentences_before: Species or groups are put in the wastebsket taxon when they do not fit into one of the regular taxa.
sentences_after: By definition, wastebasket taxa are either paraphyletic or polyphyletic. Their name may still be very useful to biologists, because its members may be an important evolutionary grade. Antelopes are a group which is ecologically very important, and have many similar features. However, they are not monophyletic. Species are called 'antelopes' if they look like one.
concept_name: regular taxa
headings: Wastebasket taxon
categories: Taxonomy Evolutionary biology