Nannaria tsuga, 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/67371BE7-4D3A-5673-B12B-63684DB966D9
treatment provided by	ZooKeys by Pensoft
scientific name	Nannaria tsuga
status	sp. nov.

Treatment

Nannaria tsuga View in CoL sp. nov. Figs 94 View Figure 94 , 95 Vernacular name: "The Hemlock Grove Twisted-Claw Millipede" View Figure 95

Material examined.

Holotype: United States - Tennessee • ♂; Sullivan County, Bristol, Steele Creek Park , along Hemlock Hollow Trail ; 36.5703°N, - 82.2356°W; elev. 506 m; 11 June 2018; hand collected; D. Hennen leg.; VTEC MPE04047 View Materials . GoogleMaps

Paratypes: United States - Tennessee • 2 ♂♂; same collection data as holotype; VTEC MPE04048 View Materials GoogleMaps , 4049 • 1 ♂; same collection data as holotype; VMNH MPE04311 View Materials GoogleMaps • 1 ♀; same collection data as holotype; VTEC MPE04043 View Materials GoogleMaps • 1 ♀; same collection data as holotype; VMNH MPE04050 View Materials GoogleMaps . For detailed collection data see Suppl. material 7.

Diagnosis.

Adult males of Nannaria tsuga sp. nov. are distinct from other Nannaria and the nearby N. aenigma , based on the following combination of characters: Gonopods. Gonopodal acropodite gently curving medially before apex, not nearly straight as in N. ambulatrix sp. nov. Distal zone short, directed dorsomedially, with large, lobed lateral flange (Fig. 94A View Figure 94 , red arrow), not with triangular lateral flange as in N. ambulatrix sp. nov., or without flange and serpentine as in N. aenigma . Telopodite basal zone height <1/2 length of acropodite, not enlarged, ca. 1/2 length as in N. ambulatrix sp. nov., or reduced, ca. 1/6 length as in N. aenigma . Prefemur with straight, laminate prefemoral process, separated widely from projected, with blunt prefemoral spine (Fig. 94A View Figure 94 , red triangle), prefemoral process not arising dorsomedially from small, sharp prefemoral spine as in N. ambulatrix sp. nov. Color. Tergites with orange paranotal spots (Fig. 95 View Figure 95 ). Black background. Dorsum of collum smooth with orange caudal margin.

Measurements.

♂ holotype (VTEC, MPE04047): BL = 33.9, CW = 4.3, IW = 2.0, ISW = 1.0, B11W = 5.2, B11H = 3.0; ♀ paratype (VTEC, MPE04043): BL = 31.1, CW = 3.8, IW = 2.6, ISW - 1.1, B11W = 4.9, B11H = 3.8.

Variation.

No known variation.

Distribution.

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

Ecology.

Individuals of Nannaria tsuga sp. nov. were collected from a mesic mixed hardwood and hemlock forest, composed of, in addition to hemlock, oak, beech, and buckeye. Individuals were found under moist litter on a hillside.

Etymology.

This species is named for the habitat in which it was discovered, a hemlock grove. The specific name is derived from the name Tsuga Carrière, the genus containing hemlock trees, and is a noun in apposition.

Type locality.

United States, Tennessee, Sullivan County, Bristol, Steele Creek Park, along Hemlock Hollow Trail, 36.5703°N, - 82.2356°W.