Nannaria cryomaia, 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 cryomaia sp. nov. Figs 96 , 97 Vernacular name: "The Frozen Head Twisted-Claw Millipede"

Material examined.

Holotype: United States - Tennessee • ♂; Morgan County, campground at Frozen Head State Park ; 36.1321°N, - 84.4978°W; elev. 423 m; 12 May 2017; hand collected; J. Means, D. Hennen, V. Wong leg.; VTEC MPE02642 .

Paratypes: United States - Tennessee • 1 ♂; same collection data as holotype; VMNH MPE03765 • 2 ♀; same collection data as holotype; VTEC MPE02793 , 94 • 2 ♀; same colletion data as holotype; VMNH MPE02795 , 96.

Other material.

United States - Tennessee • 1 ♂; Morgan County, Frozen Head State Park ; 36.1321°N, - 84.4978°W; 29 May 1980; R. Shelley, MSM leg.; NCSM NAN0452. For detailed collection data see Suppl. material 7 .

Diagnosis.

Adult males of Nannaria cryomaia sp. nov. are distinct from other Nannaria and the nearby Nannaria sp. nov. ‘Cratagae’ ( Nannaria wilsoni species group) based on the following combination of characters: Gonopods. Gonopodal acropodite curving medially before apex, not straight as in Nannaria sp. nov. ‘Cratagae.’ Apex with distinct constriction (Fig. 96A , red arrow), tip expanded distally, with small lobed lateral and medial flanges, not with acuminate, triangular lateral flange as in N. kassoni sp. nov. Apex without ventrally directed bend as in Nannaria sp. nov. ‘Cratagae.’ Acropodite with expanded medial flange (Fig. 96A , red triangle). Telopodite basal zone height> 1/3 length of acropodite, not ca. 1/3 as in N. kassoni sp. nov., and not ca. 1/4 length as in Nannaria sp. nov. ‘Cratagae.’ Prefemur with medially curving prefemoral process, paralleling curve of acropodite, not straight, acicular as in Nannaria sp. nov. ‘Cratagae.’ Prefemur with short, triangular prefemoral spine, not pronounced, curving as in N. kassoni sp. nov. Color. Tergites with faint orange stripes (Fig. 97 ). Dark brown background. Dorsum of collum smooth with orange margin.

Measurements.

♂ holotype (VTEC, MPE02642): BL = 24.9, CW = 3.9, IW = 2.4, ISW = 0.9, B11W = 4.7, B11H = 3.2; ♀ paratype (VMNH, MPE02796): BL = 26.6, CW = 3.9, IW = 2.2, ISW = 1.0, B11W = 5.2, B11H = 3.7.

Variation.

No known variation.

Distribution.

Known only from the type locality (Tennessee: Morgan County; Suppl. material 7; Fig. 126 ). Distribution area: N/A; status: MRE.

Ecology.

Individuals of Nannaria cryomaia sp. nov. were collected from a mesic hardwood forest dominated by oak, ironwood, beech, and hemlock, under moist leaf litter.

Etymology.

This species is named for its type locality, Frozen Head State Park in the Crab Orchard Mountains of eastern Tennessee. The specific name is a latinized noun in apposition derived from the Greek kryos -, meaning frozen, and maia - for a kind of crab.

Type locality.

United States, Tennessee, Morgan County, campground at Frozen Head State Park; 36.1321°N, - 84.4978°W.

Figures

Figure 96. Nannaria cryomaia sp. nov. holotype ♂ (VTEC, MPE 02642) left gonopod A anterior view; red arrow indicates apical constriction; red triangle indicates medial flange B medial view C posterior view. Scale bar: 0.5 mm.

Figure 97. Nannaria cryomaia sp. nov. paratype ♀ (VTEC, MPE 02793) coloration. Scale bar: 4.0 mm.

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