Redescription of Rhysodesmus dasypus (Gervais, 1847), the type species of the genus (Polydesmida: Xystodesmidae).

As both the type of the genus and the largest known xystodesmid, Rhysodesmus dasypus (Gervais, 1847) is an important and charismatic Mexican species. Despite there are numerous taxonomic contributions, R. dasypus remains enigmatic and poorly diagnosed, necessitating the need for an updated taxonomic synthesis.