A novel type of analysis, which takes advantage of an apparently natural mathematical pattern in the biodiversity produced by evolution, has settled on a tally of 8.7 million eukaryotic species, give or take a million., It has long been recognized and documented that insects are the most diverse group of organisms, meaning that the numbers of species of insects are more than any other group. In the world, some 900 thousand different kinds of living insects are known. This representation approximates 80 percent of the world's species. The true figure of living species of insects can only be estimated from , Taking the mean of most of these new estimates indicates that globally there are approximately 1.5 million, 5.5 million, and 7 million species of beetles, insects, and terrestrial arthropods, respectively. Previous estimates of 30 million species or more based on the host specificity of insects to plants now seem extremely unlikely., So the number of these species known to science increases substantially every year. The greatest species diversity exists among insects, which account for about one million of the earth's species known to science. Mammals make up one of the smallest groups, with just 5,513 members., Fungi play vital roles in ecosystems as endophytes, pathogens and saprobes. The current estimate of fungal diversity is highly uncertain, ranging from 1.5 to 12 million, but only around 150,000 species have been named and classified to date. Since the introduction of DNA based methods for species identification, the number of newly described taxa has increased from approximately 1000 to around , .