Nannaria monsdomia, Means & Hennen & Marek, 2021

Means, Jackson C., Hennen, Derek A. & Marek, Paul E., 2021, A revision of the minor species group in the millipede genus Nannaria Chamberlin, 1918 (Diplopoda, Polydesmida, Xystodesmidae), ZooKeys 1030, pp. 1-180 : 1

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.

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.

Figures

Figure 57. Nannaria monsdomia sp. nov. holotype ♂ (VTEC, MPE 02188) 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, MPE 02188) coloration. Scale bar: 4.0 mm.

Figure 126. Distribution map of Nannaria minor species group collection localities in the central Appalachians.