A revision of the minor species group in the millipede genus Nannaria Chamberlin, 1918 (Diplopoda, Polydesmida, Xystodesmidae) Author Means, Jackson C. https://orcid.org/0000-0001-7377-0696 Virginia Tech, Department of Entomology, Blacksburg, Virginia 24061, USA mjacks4@vt.edu Author Hennen, Derek A. https://orcid.org/0000-0001-7005-1151 Virginia Tech, Department of Entomology, Blacksburg, Virginia 24061, USA Author Marek, Paul E. https://orcid.org/0000-0002-7048-2514 Virginia Tech, Department of Entomology, Blacksburg, Virginia 24061, USA text ZooKeys 2021 2021-04-13 1030 1 180 http://dx.doi.org/10.3897/zookeys.1030.62544 journal article http://dx.doi.org/10.3897/zookeys.1030.62544 1313-2970-1030-1 875199397EEE5F7898EA1DB25DA62D25 Nannaria monsdomia sp. nov. Figs 57 , 58 Vernacular name: "The House Mountain Twisted-Claw Millipede" Material examined. Holotype : United States - Tennessee • ♂ ; Knox County , Mascot , House Mountain State Natural Area , along dried up stream beside Hogskin Rd. ; 36.1032°N , - 83.7642°W ; elev. 357 m ; 8 Oct. 2016 ; hand collected; J. Means , D. Hennen leg. VTEC MPE02188 . Paratypes : United States - Tennessee • 2 ♂♂ ; same collection data as holotype; VTEC MPE02186 , 2199 • 2 ♂ ; same collection data as holotype; VMNH MPE02201 , 3712 • 2 ♀♀ ; same collection data as holotype; VTEC MPE02187 , 2189 • 2 ♀♀ ; same collection data as holotype; VMNH MPE02196 , 2200 • 1 ♂ ; Knox County , Mascot , House Mountain State Natural Area , under large strips of oak bark on top of soil at top of hill; 36.1043°N , - 83.7633°W ; elev. 360 m ; 8 Oct. 2016 ; hand collected; J. Means , D. Hennen leg.; VMNH MPE03677 • 2 ♀♀ ; same collection data as preceding; VMNH MPE02180 , 2192 For detailed collection data see Suppl. material 7 . Diagnosis. Adult males of Nannaria monsdomia sp. nov. are distinct from other Nannaria and the nearby N. scutellaria , based on the following combination of characters. Gonopods . Gonopodal acropodite slightly curving medially basal to apex, not straight basal to apex as in N. scutellaria . Distal zone much reduced, rounded, with small, lobed lateral flange (Fig. 57A , red triangle)-not simple as in N. hardeni sp. nov., or bent at 90° with pronounced medial flange as in N. scutellaria . Telopodite basal zone height> 2/3 length of acropodite, not <1/3 length as in N. scutellaria . Prefemur with large, laminate prefemoral process, curving medially, crossing acropodite and expanding before tip, not straight, acicular as in N. hardeni sp. nov., or curving laterally as in N. scutellaria . Prefemoral process length greater than height of telopodite basal zone, not subequal as in N. hardeni sp. nov. Prefemoral spine widely separated from prefemoral process (Fig. 57A , red arrow) and rounded, not sharp or tooth-like as in N. hardeni sp. nov., or lacking as in N. scutellaria . Color . Tergites with bright orange paranotal spots and faint orange stripes (Fig. 58 ). Dark brown background. Dorsum of collum smooth with orange margin. Figure 57. Nannaria monsdomia sp. nov. holotype ♂ (VTEC, MPE02188) left gonopod A anterior view; red triangle indicates small lateral flange on tip; red arrow indicates wide separation between prefemoral process and rounded prefemoral spine B medial view C posterior view. Scale bar: 0.5 mm. Figure 58. Nannaria monsdomia sp. nov. holotype ♂ (VTEC, MPE02188) coloration. Scale bar: 4.0 mm. Measurements. ♂ holotype (VTEC, MPE02188): BL = 30.7, CW = 4.2, IW = 2.2, ISW = 0.9, B11W = 4.2, B11H = 3.1; ♀ paratype (VTEC, MPE02187): BL = 33.5, CW = 4.1, IW = 2.5, ISW = 1.1, B11W = 5.3, B11H = 3.9. Variation. No known variation. Distribution. Known only from the type locality, Suppl. material 7; Fig. 126 . Distribution area: N/A; status: MRE. Ecology. Individuals of N. monsdomia sp. nov. were collected from a mesic hardwood forest dominated by beech, maple, magnolia, pawpaw, and poison ivy. All specimens were found under 1-4 cm of hardpacked soil at the edge of boulders near a dried up, rocky stream. Etymology. The specific epithet is an arbitrary combination of letters from the Latin mons , meaning mountain, and domus , meaning house, which refers to the type locality House Mountain State Natural Area. It is to be treated as a noun in apposition. Type locality. United States, Tennessee, Knox County, Mascot, House Mountain State Natural Area, along dried up stream beside Hogskin Rd., 36.1032°N , - 83.7642°W .