Korcak's power law is applied to examine the patchiness of distribution of taxonomic richness, using data from the Oribatida as an example. The power law [N (n) = A × n^B, where N (n) is the number of taxonomic units with at least n subunits] provides adequate descriptions of the distribution of taxonomic richness at a variety of scales in the Oribatida. The variation of the Korcak's exponent B across taxonomic scales is examined and its value as a measure of patchiness of distribution of taxonomic richness is discussed.