Diplopoda From Rondônia, Brazil. Ii. Three New Genera In The Family Chelodesmidae (Polydesmida) R L. H Abstract Author Hoffman, Richard L. Virginia Museum of Natural History, Martinsville, Virginia, 24112, U. S. A. E-mail: rhoffman @ vmnh. net text Papéis Avulsos de Zoologia 2006 S � o Paulo 2006-01-01 46 5 43 55 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492006000500001&lng=en&nrm=iso&tlng=en journal article 10.1590/S0031-10492006000500001 1807-0205 12640709 Rhicnostethus n. gen. Type species: E. rondoni , by present designation. The genus also includes Leptodesmus coriaceus Schubart (1947) from Mato Grosso . Name: A neologism composed of the Greek elements rhicnos (wrinkled) and stethos (chest, sternum), in reference to the singular appearance imparted by the dense longitudinal carination of the podosterna. Diagnosis: This genus is distinguished by the combination of longitudinally wrinkled (striated) podosterna, microgranular tergal texture, prolonged male gonapophysis and course of the prostatic groove along the edge of a broad lobe of the acropodite. Distribution: This taxon is known from the Brazilian states of Rondônia and Mato Grosso . Species: Two species are so far known ( R. rondoni , R. coriaceus ). Remarks: Several characters, such as small gonopod aperture, granulate dorsum, shape of peritreme, and size and placement of the gonocoxal apophysis suggest possible affinity with taxa in the tribe Chondrodesmini . The longitudinal striation of the sterna is possibly a generic apomorphy, although the condition in R. coriaceus (not mentioned, but possibly overlooked, by Schubart) requires examination.