Phylogenetic Systematics of the Millipede Family Xystodesmidae Author Means, Jackson C. Department of Entomology, Virginia Tech, Blacksburg, VA, USA, Author Hennen, Derek A. Department of Entomology, Virginia Tech, Blacksburg, VA, USA, Author Tanabe, Tsutomu Faculty of Advanced Science and Technology, Kumamoto Author Marek, Paul E. Department of Entomology, Virginia Tech, Blacksburg, VA, USA, paulemarek@gmail.com text Insect Systematics and Diversity 2021 2021-03-01 5 2 1 1 26 http://dx.doi.org/10.1093/isd/ixab003 journal article 10.1093/isd/ixab003 2399-3421 5384533 A55797AF-B8E6-4E46-8FD2-53B5C79FCEF8 Genus Idaloria Marek, Means, Hennen , New Genus Vernacular name: ‘The Mount Ida Millipede’ Type species: Cibularia profuga Causey, 1955 . Taxa included: monotypic. Diagnosis: Adult males of Idaloria are distinct from other genera of the tribe Rhysodesmini based on the following combination of characters: Gonopods . Acropodite linear, not curved as in the Apheloriini . Acropodite distinctly narrowed at apex, forming angular shoulder. Prefemoral process acicular, longer than one-half the length of the acropodite. Acropodite without a cingulum, as in Brachoria and Appalachioria . Color . Tergites with 2 red paranotal spots. Nucleotide site substitutions . 12S: C (94); 16S: T (146, 451); G (934, 1239); T (1017, 1322); C (1043, 1348); COI: T (265, 2541); 28S: T (1293, 5644). Distribution: Idaloria profuga is known from a population in the Ouachita Mountains of Montgomery County, Arkansas and a second disjunct population in Ouachita Parish, Louisiana . Etymology: This genus is named after where the type was discovered on Mount Ida, Arkansas . The name is a combination of ‘Ida’ and the Latin - orium , ‘place for’. The ending ‘- oria ’ is commonly used for genera in the family.