Nannaria breweri, 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 breweri sp. nov. Figs 52 , 53 Vernacular name: "Michael Brewer’s Twisted-Claw Millipede"

Material examined.

Holotype: United States - Tennessee • ♂; Hamblen County, Morristown, Panther Creek State Park , in gully below parking lot at Spoone Recreation Area , near Ore Mine Trail ; 36.2167°N, - 83.4055°W; elev. 373 m; 9 Oct. 2016; hand collected; J. Means and D. Hennen leg.; VTEC MPE02191 .

Paratypes: United States - Tennessee • 1 ♂; same collection data as for holotype; VTEC MPE02198 • 2 ♂♂; same collection data as for holotype; VMNH MPE02205 , 3730 • 5 ♀♀; same collection data as for holotype; VTEC MPE02197 , 2202-4, 3719 • 4 ♀♀; same collection data as for holotype; VMNH MPE03720 , 3731-3.

Other material.

United States - Tennessee • 1 ♂; Grainger County, 6.8 miles S of Rutledge ; 36.1822°N, - 83.5150°W; 18 May 1956; Lund, Keeton, R. Hoffman leg.; VMNH NAN0324 • 2 ♀♀; Hamblen County, Panther Creek State Park, Seven Sinkholes Trail ; 36.2160°N, - 83.4057°W; elev. 343 m; 14 Oct. 2007; hand collected; P. Marek, L. Swafford, M. Brewer, C. Hall, K. Bader leg; VTEC SPC001167, 1179 • 5 ♂♂; Hamblen County, Cherokee Lake Bluff , 3.5 miles N of Morristown; 36.2646°N, - 83.2950°W; 19 May 1961; L. Hubricht leg.; VMNH NAN0309; SCAU - Virginia • 1 ♂; Tazewell County, Burkes Garden, on Garden Mountain ; 37.0809°N, - 81.4145°W; elev. 1158 m; 27 Oct. 1970; R. Hoffman leg.; VMNH NAN0001 • 1 ♂; same collection data as preceding; 16 Oct. 1966; A. Q. Field Trip leg; VMNH NAN0004 • 1 ♂; same collection data as preceding; 14 Apr. 1965; Herp Class leg.; VMNH NAN0008 • Tazewell County, Burkes Garden, Station Spring Creek; 37.0809°N, - 81.4145°W; elev. 1219 m; 23 Aug. 1981; R. Hoffman leg.; VMNH NAN0006 • 1 ♂; Tazewell County, Burkes Garden, NW slope Beartown Mountain ; 36.9361°N, - 81.8861°W; elev. 1341 m; 12 July 1971; R. Hoffman leg.; VMNH NAN0007 • Tazewell County , Burkes Garden ; 37.0980°N, - 81.3411°W; 20 March 1954; R. Hoffman leg.; VMNH, NAN0009 • 2 ♂♂; same collection data as preceding; 30 March 1954; VMNH NAN0070 • 2 ♂♂; Tazewell County, Burkes Garden, Cassell Farm ; 37.0980°N, - 81.3411°W; 26 April 1981; R. Hoffman leg.; VMNH NAN0142 • SCAU - West Virginia • 1 ♂; Mercer County, Concord College campus; 37.4245°N, - 81.0060°W; 14 Nov. 1966; W. Shear leg.; VMNH NAN0036. For detailed collection data see Suppl. material 7 .

Diagnosis.

Adult males of Nannaria breweri sp. nov. are distinct from other Nannaria and the nearby N. scutellaria Causey, 1942, based on the following combination of characters: Gonopods. Acropodite curving medially throughout, not sinuous, only curving slightly medially as in N. tennesseensis and not straight, with 90° medial bend at apex as in N. scutellaria . Distal zone with large, lobed lateral flange (Fig. 52A , red arrow), not with small, triangular lateral flange as in N. tennesseensis , or medial flange as in N. scutellaria . Tip directed medially, not cephalically as in N. tennesseensis . Telopodite basal zone height <1/2 length of acropodite, not> 1/2 as in N. tennesseensis or ca. 1/4 length as in N. scutellaria . Prefemur with medially curving prefemoral process, not straight as in N. tennesseensis . Prefemoral tip bent dorsally (Fig. 52B ). Prefemoral spine fused to prefemoral process throughout length, forming ridge along base of prefemoral process (Fig. 52C , red triangle). Color. Tergites with orange paranotal spots (Fig. 53 ). Brown background. Collum smooth with orange margin.

Measurements.

♂ holotype (VTEC, MPE02191): BL = 29.9, CW = 4.8, IW = 2.3, ISW = 0.9, B11W = 5.4, B11H = 3.6; ♀ paratype (VTEC, MPE02203): BL = 35.9, CW = 4.5, IW = 2.5, ISW = 1.0, B11W = 5.8, B11H = 4.4.

Variation.

No known variation.

Distribution.

Known from a linear area from southern West Virginia to northeastern Tennessee (Tennessee: Grainger and Hamblen counties; West Virginia: Mercer County; Virginia: Russell and Tazewell counties, Suppl. material 7; Fig. 126 ). Distribution area: 635 km2; status: MRE.

Ecology.

Individuals of N. breweri sp. nov. have been collected from mesic, broadleaved forests composed of pawpaw, maple, spicebush, oak, and elm, often under deciduous leaf litter and/or beneath 1-2 cm dark soil.

Etymology.

This species is named for its co-collector and West Virginian, Dr. Michael Brewer (Suppl. material 7). The specific name is a genitive noun derived as a patronym.

Type locality.

United States, Tennessee, Hamblen County, Morristown, Panther Creek State Park, in gully below parking lot at Spoone Recreation Area, near Ore Mine Trail, 36.2167°N, - 83.4055°W.

Figures

Figure 52. Nannaria breweri sp. nov. holotype ♂ (VTEC, MPE 02191) left gonopod A anterior view; red arrow indicates lateral flange B medial view C posterior view; red triangle indicates prefemoral spine fused to the prefemoral process. Scale bar: 0.5 mm.

Figure 53. Nannaria breweri sp. nov. holotype ♂ (VTEC, MPE 02191) coloration. Scale bar: 4.0 mm.

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