The study of edaphic ecosystems' fauna is indispensable to understand the dynamics of such an important natural resource as the soils of an agricultural country. The work that is analyzed embraces the results obtained in more than five years of research on edaphic invertebrates’ biodiversity in Cuba and in other countries of the Neotropical region, as well as the biology and breeding techniques of some species. The transcendency of this work lies on its usefulness to carry out conservationist studies, and to the appropriate handling of the edaphic ecosystem and its repercussion in the protection of soils as a natural resource.

It is also created a collection of this groups, being earth worms the only one in the country. New dicotomic classes have been elaborated for the taxonomy of these groups in Cuba and in the Neotropical region, being updated biogeographic knowledge.

Its scientific novelty consists on the knowledge contribution on zoogeography, as well as on the world biodiversity, specifically in Cuba, of a numerous group of edaphic fauna's species. In this result, 5 families, 32 genuses and 48 species are consigned for the first time in the country; a genus and 23 species are also described new for science, and it is updated diversity knowledge on several zoological invertebrate groups, such as earth worms, acari, collembolans, coleoptera and formicidae.

The results on biology and breeding techniques of several earth worms' species, allowed establishing the theoretical principles and technical norms on tropical earthworm farming, aimed at obtaining humus and worm protein for their application in agriculture and in animal production, respectively. On the other hand, the selection of earth worms' species to introduce in outworn soils creates new perspectives to increase their fertility and crops' yield. These results have been very useful in theoretical and practical teaching in Cuban and Mexican universities.

The work is summarized in 13 scientific articles, 9 of these in prestigious magazines of Biological Sciences; 2 doctorate theses, 2 books for higher education and a chapter in another book, and the presentation of 10 reports in national and international events in Mexico, Spain and Cuba.