Nannaria piccolia, 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

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scientific name

Nannaria piccolia

sp. nov.

Nannaria piccolia   sp. nov. Figs 17 View Figure 17 , 18 Vernacular name: "The Lichen-Loving Twisted-Claw Millipede" View Figure 18

Material examined.

Holotype: United States - Virginia • ♂; Rockbridge County, 1.5 air miles NW of Collierstown, Lake Robertson Recreation Area , Mountain Trail , hillside near Hawks Creek stream crossing; 37.8065°N, - 79.6152°W; elev. 457 m; 20 Feb. 2018; hand collected; J. Means, D. Hennen leg.; VTEC MPE03809 View Materials . GoogleMaps  

Paratypes: United States - Virginia • 1 ♂; same collection data as holotype; VTEC MPE03812 View Materials GoogleMaps   1 ♂; same collection data as holotype; VMNH MPE03816 View Materials GoogleMaps   2 ♀♀; same collection data as holotype; VTEC MPE03811 View Materials GoogleMaps   , 17 • 1 ♀; same collection data as holotype; VMNH MPE03818 View Materials GoogleMaps   .

Other material.

United States - Virginia • 1 ♂; Alleghany County, Longdale Mines ; 37.8083°N, - 79.6834°W; 15 Sep. 1948; R. Hoffman leg.; VMNH NAN0645 GoogleMaps   1 ♂; Rockbridge County, Rockbridge Alum Springs , 8 mi SW Goshen; 37.9086°N, - 79.6123°W; 1 June 1970; Newman leg.; VMNH NAN0647. For detailed collection data see Suppl. material 7 GoogleMaps   .


Adult males of Nannaria piccolia   sp. nov. are distinct from other Nannaria   and the sympatric N. shenandoa   , based on the following combination of characters: Gonopods. Gonopodal acropodite gradually curving medially before apex, not straight as in N. shenandoa   . Distal zone short, bent medially forming 130° angle with acropodite (Fig. 17 View Figure 17 ). Telopodite basal zone > 1/3 length of acropodite, not < 1/3 as in N. fowleri   and N. shenandoa   . Tip and distal zone simple, rectangular, blunt, < 1/8 length of acropodite, not large, curving with flange as in N. shenandoa   . Prefemoral process short, laterally curved, arising dorsomedially from prefemoral spine, not long, serpentine, paralleling curve of acropodite as in N. fowleri   , or crossing over acropodite as in N. shenandoa   . Space between prefemoral process and acropodite wider than telopodite basal zone, not thinner as in N. fowleri   . Prefemur with stout, tooth-like prefemoral spine (Fig. 17C View Figure 17 , red arrow). Color. Tergites with either orange or white paranotal spots (Fig. 18A, B View Figure 18 ) and occasionally orange paranotal spots with orange stripes (Fig. 18 C View Figure 18 ). Brown to black background. Dorsum of collum smooth with either orange or white margin, depending on color morph.


♂ holotype (VTEC, MPE03809): BL = 26.4, CW = 3.9, IW = 2.4, ISW = 0.8, B11W = 5.0, B11H = 2.9; ♀ paratype (VTEC, MPE03811): BL = 36.5, CW = 4.3, IW = 2.7, ISW = 0.9, B11W = 5.5, B11H = 4.0


No known variation.


Known from a small area in western Virginia (Virginia: Allegany and Rockbridge counties, Suppl. material 7; Fig. 126 View Figure 126 ). Distribution area: 35 km2; status: MRE.


Individuals of Nannaria piccolia   sp. nov. have been collected from mesic deciduous forests dominated by oak, maple, and hickory, typically found under leaf litter on hillsides.


Named as a gesture of goodwill to the community of lichen specialists, in honor of the lichen species Piccolia nannaria   (Tuck.) Lendemer & Beeching. The specific epithet is a noun in apposition.

Type locality.

United States, Virginia, Rockbridge County, 1.5 air miles NW of Collierstown, Lake Robertson Recreation Area, Mountain Trail, hillside near Hawks Creek stream crossing, 37.8065°N, - 79.6152°W.