Nannaria laminata Hoffman, 1949

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 laminata Hoffman, 1949 Figs 48 , 49 Vernacular name: "The Laminate Twisted-Claw Millipede"

Nannaria laminata Hoffman, 1949: 383, figs 11, 12. Chamberlin and Hoffman 1958: 41. Hoffman 1999: 367. Marek et al. 2014: 37. Means et al. 2021: S70.

Material examined.

Holotype: United States - West Virginia • ♂; Mercer County, ravine beside U.S. Route 460, ca. 2 miles south of Glen Lyn, Virginia; [37.3550°N, - 80.8982°W]; 12 July 1947; H. H. Hobbs, C. M. Wilson leg.; NMNH Type #1806.

Other material.

United States - Virginia • 1 ♂; Amherst County, Tarjacket Ridge FS 1167, 3500'; 37.7665°N, - 79.1863°W; 13 Nov. 1999; VMNH Survey leg.; VMNH NAN0332 • 1 ♂; Augusta County, across creek from Barnwood Cabin , where old road flattens out by small stream; 37.89643°N, - 79.0007°W; elev. 828 m; 18 Mar. 2017; J. Means leg.; VTEC MPE02401 • 1 ♀; same collection data as preceding; VTEC MPE03679 • 1 ♂; Augusta County, far corner of upper Sherando Lake , bank side by marsh; 37.9139°N, - 79.0207°W; elev. 607 m; 19 Mar. 2017; J. Means leg.; VTEC MPE02392 • 1 ♂; Bedford County, Flattop Mtn., Peaks of Otter nr MP 82.8; 37.4498°N, - 79.5834°W; 27 Oct. 1986; J. Mitchell leg.; VMNH NAN0330 • 3 ♂♂; Bland County, Hamilton's Cave , ca. 6 km ENE of Mechanicsville, rich wooded hillside; 37.7032°N, - 78.1627°W; 16 May 1980; R. Hoffman leg.; VMNH NAN0150 • 2 ♂♂; Botetourt County, Harkening Hill, Blue Ridge Parkway ; 37.4577°N, - 79.6175°W; 21 Oct. 1989; J. Mitchell leg.; VMNH NAN0333 • 1 ♂; Botetourt County, North Creek, 1-3 mi. east of Arcadia ; 37.5411°N, - 79.5866°W; 13 Oct. 1973; R. Hoffman leg.; VMNH NAN0334 • 1 ♂; Campbell County, 4 miles NW of Rustburg ; 37.3176°N, - 79.1526°W; 14 Oct. 1950; L. Hubricht leg.; VMNH NAN0331 • 1 ♂; Cumberland County, clearcut north DF site 2 ca 2 km SSW of Columbia ; 37.7361°N, - 78.1714°W; 17 May 1990; J. Mitchell leg.; VMNH NAN0253 • 3 ♂♂; same collection data as preceding; Nov. 1989; VMNH NAN0259 • 1 ♂; same collection data as preceding; 2 Apr. 1990; VMNH NAN0261 • 1 ♂; same collection data as preceding; 3 Dec. 1989; VMNH NAN0263 • 1 ♂; same collection data as preceding; 15 Feb. 1990; VMNH NAN0264 • 19 ♂♂; same collection data as preceding; 19 Oct. 1989 VMNH NAN0266 • 7 ♂♂; same collection data as preceding; 16 Nov. 1989; VMNH NAN0267 • 11 ♂ ♀; same collection data as preceding; Nov. 1989; VMNH NAN0361 • 6 ♂♂; same collection data as preceding; 1 May 1990; VMNH NAN0255 • 1 ♂; Cumberland County, hardwood site 1 (north), 2 km SSW of Columbia ; 37.7361°N, - 78.1715°W; 1 May 1990; J. Mitchell leg.; VMNH NAN0254 • 24 ♂♂; same collection data as preceding; 17 Mar. 1990; VMNH NAN0268 • 1 ♂; Cumberland County, hardwood site 4 (south), 7 km SSW of Columbia ; 37.6953°N, - 78,1959°W; 5 Oct. 1989; J. Mitchell; VMNH NAN0257 • 3 ♂♂; Cumberland County, hardwood site 2 - N 2 km SSW Columbia ; 37.7361°N, - 78.1714°W; VMNH NAN0258 • 2 ♂♂; Cumberland County, pinewoods DF site 5, ca. 5.5 km SSW of Columbia ; 37.7048°N, - 78.1889°W; 17 May 1990; J. Mitchell leg.; VMNH NAN0532 • 1 ♂; Giles County, Jefferson National Forest, Cascades Day Use Area , within a few hundred meters of the start of the Cascades Trail , near parking lot; 37.3500°N, - 80.5835°W; elev. 544 m; 21 Oct. 2015; hand collected; D. Hennen leg.; VTEC MPE00891 • 1 ♂; Giles County, side of Upper Trail on way to Cascades ; 37.3613°N, - 80.5875°W; elev. 799 m; 18 Feb. 2018; hand collected; J. Means leg.; VTEC MPE03807 • 1 ♂; Giles County, Jefferson National Forest past Mountain Lake Biological Station , past Mini Ball Hill on Rt 613; 37.4209°N, - 80.5093°W; elev. 1062 m; 3 Oct. 2016; hand collected; J. Means, D. Hennen, V. Wong leg.; VTEC MPE02124 • 2 ♀♀; same collection data as preceding; VTEC MPE02136 , 2142 • 1 ♂; Prince Edward County, Farmville, Price Drive ; 37.3019°N, - 78.3922°W; 28 June 1988; W. Shear leg.; VMNH NAN0256 • 1 ♂; Prince Edward County, 13 mi S Farmville , dug up 12 cm under surface of clay; 37.1134°N, - 78.3922°W; 22 Feb. 1975; W. Shear leg.; VMNH NAN0260 • 1 ♂; Prince Edward County, pitfall trap, old field at Rice ; 37.2750°N, - 78.2916°W; 17 June 1981; R. Bellinger leg.; VMNH NAN0265; SCAU - West Virginia • 1 ♀; Mercer County, just over the WV state line on 460, ca. 2 miles SW of Glen Lyn on 219/8; 37.3452°N, - 80.9105°W; elev. 507 m; 12 Nov. 2017; hand collected; J. Means leg.; VTEC MPE03474 • 1 ♂; Monroe County, 5.8 air miles east of Linside , up logging road; 37.4749°N, - 80.5673°W; elev. 934 m; 27 Apr. 2017; hand collected; J. Means, D. Hennen, P. Marek, P. Shorter, V. Wong leg.; VTEC MPE02520 • 3 ♀♀; same collection data as preceding; VTEC, MPE02578 , 2579, 3675 • 2 ♂♂; Monroe County, along logging road off VA rt 613, down in bowl and on each side of dirt and gravel road; 37.4717°N, - 80.5620°W; elev. 1107 m; 27 Apr. 2016; hand collected; J. Means, D. Hennen, P. Marek, P. Shorter, V. Wong leg.; VTEC MPE02528 , 2561. For detailed collection data see Suppl. material 7 .

Diagnosis.

Adult males of N. laminata are distinct from other Nannaria and the nearby N. solenas sp. nov. and N. wilsoni , based on the following combination of characters: Gonopods. Gonopodal acropodite semi-circular, curving dorsomedially with abrupt 90° curve after apex, not straight before abrupt 90° curve as in N. solenas sp. nov. or with laminate corkscrew before apex as in N. wilsoni . Acropodite tip simple, directed posteriorly, not directed anteriorly as in N. solenas sp. nov. and not with triangular lateral flange as in N. wilsoni . Tip terminating in sharp claw-like point, not blunt point as in N. solenas sp. nov. and N. wilsoni . Height of telopodite basal zone> 1/3 length of acropodite, not ca. 1/2 length as in N. solenas sp. nov., or ca. 1/5 as in N. wilsoni . Prefemoral process large, laminate and serpentine, with prefemoral spine reduced to small, acuminate projection (Fig. 48C , red arrow), not lacking as in N. wilsoni . Color. Tergites with red paranotal spots (Fig. 49 ). Black background. Dorsum of collum smooth with red margin.

Measurements.

♂ holotype (NMNH, Type #1806): BL = 30.5, CW = 4.0, IW = 2.2, ISW = 0.9, B11W = 4.9, B11H = 3.4.

Variation.

Nannaria laminata occupies a relatively large geographic area,> 10,000 km2, and displays a fair amount of morphological variation; however, the general shape of the acropodite and laminate prefemoral process remain constant throughout. Variation is seen in the sharpness and curve of the acropodite tip; some individuals display a more medially directed, blunt tip than the holotype. Additionally, the width of the prefemoral process (when viewed anteriorly or posteriorly) varies widely between individuals.

Distribution.

Known from a horizontal strip from central Virginia to just north of the border into West Virginia (Virginia: Amherst, Augusta, Bedford, Botetourt, Campbell, Cumberland, Giles, and Prince Edward counties; West Virginia: Mercer and Monroe counties, Suppl. material 7; Fig. 126 ). Distribution area: 9,297 km2; status: SRE.

Ecology.

Individuals of N. laminata have been collected from mesic deciduous forests dominated by maple, oak, rhododendron, and some pine, often under 1-2 cm soil and/or leaf litter.

Etymology.

Hoffman (1949) gives no explanation for the name Nannaria laminata in his description of the species, however it is reasonable to assume that the name refers to the laminate prefemoral process, the major distinguishing morphological character.

Type locality.

United States, West Virginia, Mercer County, ravine beside U.S. Route 460, ca. 2 miles south of Glen Lyn, Virginia; [37.3550°N, - 80.8982°W].

Notes.

In the original publication, Hoffman (1949: 384) designates a male holotype (NMNH Type #1806) collected by H. Hobbs and C. Wilson on July 12, 1947.

Figures

Figure 48. Nannaria laminata holotype ♂ (NMNH, Type 1806) left gonopod A anterior view B medial view C posterior view; red arrow indicates reduced, acuminated prefemoral spine. Scale bar: 0.5 mm.

Figure 49. Nannaria laminata non-type ♂ (VTEC, MPE 02392) coloration. Scale bar: 4.0 mm.

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