After the publication of Darwin's theory, perceived by all advanced scientists, the newly creating flora and fauna systems must be phylogenetic, refl

Units of biological classification [Taxonomic]

After the publication of Darwin's theory, perceived by all advanced scientists, the newly creating flora and fauna systems must be phylogenetic, reflecting the relationship between them and a sequence of different taxonomic groups development.

The basic unit in taxonomy is the species. Darwin considered species as a historical phenomenon. Species appears, develops, changes and finally disappears in the struggle for existence process, with the appearance of more powerful competitors. Meanwhile species have the real existence in nature. In the wild, according to Darwin, there are no impassable boundaries between species and between species and varieties.

Academician V.L. Komarov in his book “The doctrine of the species” (1940) defines the species as follows: “Species is the totality of generations originating from a common ancestor, and under the influence of the struggle for existence isolated from the world of living beings; however, species are a stage in the process of evolution”. Taken from http://worldofschool.org

At the present time the following classification of taxonomic units (from top to bottom) is used:

The kingdom, the phylum (division in plants), class, order, family, genus, species, variety, form, a separate individual.