Nannaria ignis, 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

publication ID	https://dx.doi.org/10.3897/zookeys.1030.62544
persistent identifier	https://treatment.plazi.org/id/C435A97F-2AFD-5B69-AD23-3D71411F8197
treatment provided by	ZooKeys by Pensoft
scientific name	Nannaria ignis
status	sp. nov.

Treatment

Nannaria ignis View in CoL sp. nov. Figs 61 View Figure 61 , 62 Vernacular name: "The Dragon-Headed Twisted-Claw Millipede" View Figure 62

Material examined.

Holotype: United States - Virginia • ♂; Bland County, base of Big Walker Mountain off powerline access road; 37.0383°N, - 81.1090°W; elev. 828 m; 28 Mar. 2016; hand collected; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01063 View Materials • GoogleMaps

Paratype: United States - Virginia • 1 ♀; same collection data as holotype; VMNH MPE01064 View Materials GoogleMaps .

Other material.

United States - Virginia • 1 ♀; Bland County, 0.5 mi. down road on south side of Little Walker Mtn. near powerline; 37.0273°N, - 81.0933°W; elev. 871 m; 6 Jan. 2016; hand collected; J. Means, D. Hennen, R. Jean, P. Marek leg.; VTEC MPE00917 View Materials GoogleMaps • 2 ♂♂; Bland County, uphill of road, under mixed pine and hardwood ca. 0.3 m from power line on north side of LWM; 37.0302°N, - 81.0977°W; elev. 879 m; 8 Jan. 2016; hand collected; J. Means, D. Hennen, P. Marek, R. Jean leg.; VTEC MPE00921 View Materials GoogleMaps , 922 • 1 ♂; Bland County; 37.0324°N, - 81.0947°W; elev. 827 m; 21 Nov. 2016; hand collected; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01037 View Materials GoogleMaps • 2 ♂♂; Bland County, next to rock face, outcrop going down from access road; 37.0478°N, - 81.1155°W; elev. 1184 m; 17 May 2016; hand collected; D. Hennen, P. Shorter, D. Krall, A. Prewitt leg.; VTEC MPE01198 View Materials GoogleMaps , 1202 • 1 ♂; Bland County, Big Walker Mtn. , 2 mi E of Sharon Spgs.; 37.0585°N, - 81.0988°W; 28 July 1962; R. Hoffman leg.; VMNH NAN0010 GoogleMaps • 2 ♂♂; Wythe County; 37.0257°N, - 81.0901°W; elev. 838 m; Jan. 2016; hand collected; J. Means, D. Hennen, R. Jean, P. Marek leg.; VTEC MPE00912 View Materials GoogleMaps , 918 • 1 ♂; Wythe County; 37.0315°N, - 81.0950°W; elev. 841 m; 21 Mar. 2016; hand collected; J. Means, P. Marek, A. Prewitt leg.; VTEC MPE01036 View Materials GoogleMaps . For detailed collection data see Suppl. material 7 .

Diagnosis.

Adult males of Nannaria ignis sp. nov. are distinct from other Nannaria and the sympatric N. aenigma based on the following combination of characters: Gonopods. Gonopodal acropodite gently curving medially before apex, not strongly curved as in N. ohionis Loomis & Hoffman, 1948. Distal zone curving dorsomedially (Fig. 61B View Figure 61 , red arrow), not medially as in N. ohionis or N. aenigma . Tip with small, rounded lateral flange (Fig. 61A View Figure 61 , red triangle),not simple as in N. ohionis , or serpentine as in N. aenigma . Telopodite basal zone reduced, ca. 1/4 length of acropodite, not> 1/3 length as in N. ohionis , or ca. 1/6 length as in N. aenigma . Prefemur with serpentine prefemoral process, bending ventrally before curving cephalolaterally (Fig. 61B View Figure 61 ), not straight, acicular as in N. ohionis or N. aenigma . Prefemoral process ca. 3/4 length of acropodite, not ca. 1/2 length as in N. aenigma . Prefemoral process arising dorsomedially from large, sharp prefemoral spine, not arising from top of prefemoral spine as in N. ohionis . Color. Tergites with white (Fig. 62A View Figure 62 ) or orange (Fig. 62B View Figure 62 ) paranotal spots. Dark brown background. Dorsum of collum smooth with either white or orange margin, depending on color morph.

Measurements.

♂ holotype (VTEC, MPE01063): BL = 25.3, CW = 3.2, IW = 2.3, ISW = 0.8, B11W = 3.9, B11H = 2.5; ♀ paratype (VMNH, MPE01064): BL = 27.6, CW = 3.6, IW = 1.9, ISW = 0.9, B11W = 4.6, B11H = 3.2.

Variation.

Individuals of N. ignis sp. nov. from the ridge of Big Walker Mountain have slightly wider, more laminate prefemoral processes, and a more pronounced lateral flange at the tip of the acropodite.

Distribution.

Known only from a small area on the border of Bland and Wythe counties in southwestern Virginia, and on both Big and Little Walker Mountains (Virginia: Bland and Wythe counties; Suppl. material 7; Fig. 126 View Figure 126 ). Distribution area: 3.5 km2; status: MRE.

Ecology.

Individuals of N. ignis sp. nov. were collected from mesic broadleaved forests composed of oak, maple, laurel, and some pine.

Etymology.

This species is named for the shape of its acropodite in the medial view, which resembles a dragon’s head and neck. The specific name is a noun in apposition derived from the Latin ignis meaning fire.

Type locality.

United States, Virginia, Bland County, base of Big Walker Mountain off powerline access road, 37.0383°N, - 81.1090°W.