A revision of the minor species group in the millipede genus Nannaria Chamberlin, 1918 (Diplopoda, Polydesmida, Xystodesmidae)
Author
Means, Jackson C.
https://orcid.org/0000-0001-7377-0696
Virginia Tech, Department of Entomology, Blacksburg, Virginia 24061, USA
mjacks4@vt.edu
Author
Hennen, Derek A.
https://orcid.org/0000-0001-7005-1151
Virginia Tech, Department of Entomology, Blacksburg, Virginia 24061, USA
Author
Marek, Paul E.
https://orcid.org/0000-0002-7048-2514
Virginia Tech, Department of Entomology, Blacksburg, Virginia 24061, USA
text
ZooKeys
2021
2021-04-13
1030
1
180
http://dx.doi.org/10.3897/zookeys.1030.62544
journal article
http://dx.doi.org/10.3897/zookeys.1030.62544
1313-2970-1030-1
875199397EEE5F7898EA1DB25DA62D25
Nannaria fracta
sp. nov.
Figs 80
, 81 Vernacular name: "The Breaks Interstate Park Twisted-Claw Millipede"
Material examined.
Holotype
:
United States
-
Virginia
•
♂
;
Dickenson County
,
Haysi
,
Breaks Interstate Park
,
Laurel Branch Trail
at intersection with
Cold Spring Trail
;
37.2897°N
, -
82.2999°W
; elev.
565 m
;
28 Sep. 2017
; hand collected;
J. Means
,
D. Hennen
leg.; VTEC MPE031781.
Paratypes
:
United States
-
Virginia
•
♂
; same collection data as holotype; VTEC,
MPE03179
•
1 ♂
; same collection data as holotype; VMNH
MPE03756
•
2 ♂♂
; same collection data as holotype; VTEC
MPE03183
, 84;
1 ♂
;
Dickenson County
,
Breaks Interstate Park
, in camping area;
37.2936°N
, -
82.3005°W
;
16 Apr. 1983
;
D. Ogle
leg.; VMNH NAN0156 • SCAU
-
Kentucky
•
2 ♀♀
;
Pike County
,
Pikeville
,
Bob Amos Park
, 424
Bob Amos Dr.
WW
Gearheart Hiking Trail
;
37.4690°N
, -
82.5462°W
; elev.
359 m
;
28 Sep. 2017
; hand collected;
J. Means
,
D. Hennen
leg.; VTEC
MPE03185
, 86.
Other material.
United States
-
Virginia
•
1 ♂
;
Dickenson County
,
Breaks Interstate Park
;
37.2936°N
, -
82.3005°W
;
7 Sep. 1967
;
Neff, R.
Hoffman
leg.; VMNH NAN0154 •
1 ♂
;
Russell County
,
1 mile
NW of Lynn Spring
;
37.1153°N
, -
81.9411°W
;
20 Apr. 1962
; R. Hoffman leg.; VMNH NAN0155 •
1 ♂
;
Washington
County
,
Clinch Mountain Wildlife Management Area
, deciduous forest above
Big Tumbling Creek
;
36.9931°N
, -
81.7368°W
;
21 Sep. 2011
;
S. Roble
leg.; VMNH NAN0157.
For
detailed collection data see
Suppl.
material 7
.
Diagnosis.
Adult males of
Nannaria fracta
sp. nov. are distinct from other
Nannaria
and the nearby
N. aenigma
, based on the following combination of characters:
Gonopods
.
Gonopodal acropodite acicular, slightly curving medially before tip, not bending abruptly medially at 90° at tip as in
N. bobmareki
sp. nov. or gently curving medially as in
N. aenigma
. Distal zone short, rounded-not quadrate as in
N. bobmareki
sp. nov., or long and serpentine as in
N. aenigma
. Acropodite with small, shelf-like medial flange just before tip (Fig.
80C
, red arrow). Prefemur with long, acicular prefemoral process with a pronounced, sharp prefemoral spine (Fig.
80C
, red triangle), not fused with prefemoral process as in
N. bobmareki
sp. nov. or lacking as in
N. aenigma
. Telopodite basal zone>
1/2
length of acropodite, not ca. 1/2 length of acropodite as in
N. bobmareki
sp. nov. or ca. 1/6 length of acropodite as in
N. aenigma
. Telopodite basal zone basal zone with pronounced medial swelling (Fig.
80A
, red circle), not with slight medial swelling as in
N. bobmareki
sp. nov., or lacking as in
N. aenigma
.
Color
: Tergites with red paranotal spots (Fig.
81
). Dark brown background. Dorsum of collum smooth with red margin.
Figure 80.
Nannaria fracta
sp. nov. paratype ♂ (VMNH, NAN0156) left gonopod
A
anterior view; red circle indicates pronounced basal swelling
B
medial view
C
posterior view; red arrow indicates shelf-like medial flange; red triangle indicates sharp, pronounced prefemoral spine. Scale bar: 0.5 mm.
Figure 81.
Nannaria fracta
sp. nov. paratype ♂ (VTEC, MPE03185) coloration. Scale bar: 4.0 mm.
Measurements.
♂ holotype (VTEC, MPE03178): BL = 28.9, CW = 3.7, IW = 1.8, ISW = 0.85, B11W = 4.4, B11H = 2.5; ♀ paratype (VTEC, MPE03185): BL = 35.0, CW = 4.5, IW = 2.7, ISW = 1.2, B11W = 5.6, B11H = 4.2.
Variation.
No known variation.
Distribution.
Nannaria fracta
sp. nov. has a linear distribution extending from eastern Kentucky into western Virginia (Kentucky: Pike County; Virginia: Dickenson, Russell, and Tazewell counties; Suppl. material 7, Fig.
126
). Distribution area: 98 km2; status: MRE.
Ecology.
Individuals of
N. fracta
sp. nov. have been collected from mesic hardwood forests composed of beech, maple, tuliptree, hemlock, and rhododendron. Specimens taken from Bob Amos Park in Kentucky were found under 1-2 cm of hardpacked, dark soil on the side of a hiking path, while specimens collected from Breaks Interstate Park in Virginia were found in a very moist rhododendron cove along the bank of Laurel Branch Creek, under 1-2 cm of sandy, dark soil.
Etymology.
This species is named for Breaks Interstate Park, where it was originally collected by R. L. Hoffman in 1962. The specific name is an adjective derived from the Latin
fractura
, meaning break or fracture.
Type locality.
United States, Virginia, Dickenson County, Haysi, Breaks Interstate Park, Laurel Branch Trail at intersection with Cold Spring Trail,
37.2897°N
, -
82.2999°W
.