Current studies on phylum Tardigrada and its importance in medicine

The following review allows a general vision of different studies that have been performed on Tardigrades, mainly those related to molecular biology and genetics. In general, this document shows some aspects on Tardigrade's anatomy, cryptobiosis processes and the methodology of traditional taxonomy. Then we follow with some of the findings reported on the genetics and molecular biology of Tardigrades, taking into account sequenced genes or fragments reported in GenBank and chromosomal studies, likewise, with reference to DNA extraction methods, molecular taxonomy, cDNA library construction and phylogeny-evolution.