Rowlandius dumitrescoae species group: new diagnosis, key and description of new cave-dwelling species from Brazil (Schizomida, Hubbardiidae)

The <i>Rowlandius dumitrescoae</i> species group is reviewed and rediagnosed, and its composition is revised. The group now includes <i>Rowlandius cousinensis</i>, <i>Rowlandius decui</i>, <i>Rowlandius dumitrescoae</i>, <i>Rowlandius insignis</i>, <i>Rowlandius linsduarte</i>, <i>Rowlandius monensis</i>, <i>Rowlandius peckorum</i>, <i>Rowlandius potiguar</i>, <i>Rowlandius sul</i>, <i>Rowlandius ubajara</i>, and <i>Rowlandius pedrosoi</i><b>sp. n.</b> A new species is described from a cave in northeast Brazil (Santa Quitéria, Ceará). Identification keys and distributional maps are provided for the species of the group. Sixteen species of Schizomida, including five of <i>Rowlandius</i>, are currently recognized from Brazil.