Two new species of the pseudoscorpion subfamily Lamprochernetinae Beier, 1932 from Guizhou, China (Pseudoscorpiones: Chernetidae)
Author
Xu, Hongru
0000-0002-1762-216X
The Key Laboratory of Zoological Systematics and Application, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, P. R. China & 3028383706 @ qq. com; https: // orcid. org / 0000 - 0002 - 1762 - 216 X
3028383706@qq.com
Author
Gao, Zhizhong
Department of Biology, Xinzhou Teachers University, Xinzhou, Shanxi 034000, P. R. China.
Author
Zhang, Feng
0000-0002-3347-1031
The Key Laboratory of Zoological Systematics and Application, Institute of Life Science and Green Development, Hebei University, Baoding, Hebei 071002, P. R. China & dudu 06042001 @ 163. com; https: // orcid. org / 0000 - 0002 - 3347 - 1031
text
Zootaxa
2022
2022-03-07
5105
4
581
592
journal article
20315
10.11646/zootaxa.5105.4.7
5f3a2448-b34b-44eb-b743-b506eb384dab
1175-5326
6333898
ED0AB69E-2A5C-43A2-A419-5372C24151CE
Nudochernes pseudotroglobius
sp. nov.
(
Figs 1–4
)
http://zoobank.org/NomenclaturalActs/
20C7BD03-E125-4379-8D91-A3111A273DDF
Type material.
Holotype
♀
(Ps.-
MHBU-GZXS202401
):
China
,
Guizhou Province
,
Xishui County
,
Daozuo Cave
[
28.511389°N
,
107.153333°E
], elev.
1601m
a.s.l.
,
31 August 2020
,
Zegang Feng
&
Yanmeng Hou
leg.
Paratypes
:
1♀
(Ps.-
SWUC-GZXS202402
)
,
1♂
(Ps.-
MHBU-GZXS202403
), same data as holotype
.
Etymology.
The name refers to its similar habitat with
Nudochernes troglobius
Mahnert, 2009
.
Diagnosis.
This species can be distinguished from other
Nudochernes
species
by the presence of dentate setae on carapace and pedipalp, spermathecae with a long unpaired tube and two short apical tubules,
st
situated midway between
sb
and
t
, the presence of elongate setae on the posterior corners of coxae IV, and the tarsus IV with a tactile seta in middle of tarsus (TS=0.55 (
♂
) 0.57 (
♀
)).
Description.
(
Fig. 2
). Males smaller than females with 2.77 (
♂
) 3.11–3.16 (
♀
), carapace and pedipalps reddish brown, chelicera, sternites, tergites and legs yellowish brown.
Carapace (
Fig. 3A
): evenly granulate; 1.12 (
♂
) 0.97–0.98 (
♀
) times longer than broad; eyes or eye-spots absent; with two distinct deep transverse furrows; subbasal transverse furrow situated closer to the posterior margin than to the median furrow; posterior area with a small longitudinal furrow; including 16 (
♂
) 10 (
♀
) setae on anterior margin and 15 (
♂
) 16 (
♀
) setae on posterior margin.
Abdomen: all tergites and sternites narrowly divided (except the last one). Tergal chaetotaxy (I–XI):
♂
, 7–7: 10–8: 8–7: 9–9: 8–8: 9–8: 9–9: 9–7: 7–7: 6–9: 11(2T);
♀
, 7–7: 9–10: 9–8: 11–10: 10–10: 9–10: 9–10: 8–9: 7–8: 7–7: 10(2T); all setae clavate. Sternal chaetotaxy (IV–XI):
♂
, 7–9: 11–11: 11–10: 9–10: 9–8: 8–8: 8–7: 10;
♀
, 4–4: 6–6: 12–13: 13–12: 12–13: 13–13: 9–8: 11; all setae acuminate. Sternite II of
♀
with 18 setae arranged as an inverted “U” pattern (
Figs 3E
,
4E
).
Chelicerae (
Figs 3D
,
4D
): 5 setae on hand and 1 subdistal seta on movable finger;
sbs
,
bs
,
es
dentate apically,
ls
,
is
,
gs
acuminate; fixed finger with 6 proximad-directed teeth, movable finger with broad tooth-like subapical lobe; galea with 6 long branchlets in distal part; rallum with 3 dentate blades (
Fig. 4C
); serrula exterior with 20 (
♂
,
♀
) blades.
Pedipalp (
Figs 3B
,
4A
): pedipalp robust; trochanter, femur, patella and chelal hand coarsely granulate, with dentate setae; chelal fingers with short setae; trochanter 2.24 (
♂
) 1.50–1.62 (
♀
), femur 2.24 (
♂
) 2.33–2.61 (
♀
), patella 2.30 (
♂
) 2.12–2.38 (
♀
), chela (without pedicel) 2.71 (
♂
) 2.33–2.47 (
♀
), hand (without pedicel) 1.29 (
♂
) 1.21–1.26 (
♀
) times longer than broad, movable finger 1.27 (
♂
) 1.12–1.28 (
♀
) times as long as hand (without pedicel). Fixed chelal finger with 8 trichobothria, movable chelal finger with 4 trichobothria (
Figs 3C
,
4F
):
eb
situated basally;
est
situated midway between
esb
and
et
;
ib
and
esb
situated sub-basally,
it
situated closer to tip of finger than to
ib
; s
t
situated midway between
sb
and
t
,
sb
situated closer to
b
than to s
t,
and
t
situated midway between tip of finger and
st
; fixed finger with 49 teeth, plus 5 prolateral accessory teeth and 5 retrolateral accessory teeth; movable finger with 47 teeth, plus 6 prolateral accessory teeth and 5 retrolateral accessory teeth. Venom apparatus only present in movable chelal finger, venom duct slender, nodus ramosus closer to
t
than to
st
.
Coxae: with numerous short setae over entire ventral surface, with longer setae on posterior margin of coxae IV.
Genitalia (
Fig. 4B
):
♂
: typical of
Chernetidae
;
♀
: spermathecae with a long unpaired tube and two short apical tubules.
Legs I (
Figs 3F
,
4G
): trochanter, femur, patella, tibia with numerous clavate setae; tarsus with numerous acuminate setae; proportions: trochanter 1.09 (
♂
) 1.20–1.31 (
♀
), femur 1.46 (
♂
) 1.51–1.84 (
♀
), patella 2.07 (
♂
) 2.09– 2.41 (
♀
), tibia 3.86 (
♂
) 3.33–3.70 (
♀
), tarsus 3.98 (
♂
) 4.30–5.01 (
♀
) times longer than wide; claws simple, arolium shorter than claws.
Legs IV (
Figs 3H
,
4H
): femur, patella, tibia with numerous clavate setae; trochanter and tarsus with numerous acuminate setae; proportions: trochanter 1.69 (
♂
) 1.65–1.77 (
♀
), femur + patella 5.50 (
♂
) 5.46–5.50 (
♀
), tibia 4.24 (
♂
) 4.58–5.10 (
♀
), tarsus 4.32 (
♂
) 4.20–4.87 (
♀
) times longer than deep, a tactile seta near middle of tarsus (
Figs 3I
,
4I
) (TS=0.55 (
♂
) 0.57 (
♀
)); claws simple, arolium shorter than claws.
Dimensions (length/breadth or depth, in mm).
♀
: Total length 3.11–3.16. Carapace 0.70–0.76/0.71–0.78. Pedipalps: trochanter 0.41–0.42/0.25–0.31, femur 0.64–0.68/0.25–0.27, patella 0.64–0.68/0.25–0.29, chela (with pedicel) 1.14–1.31/0.36–0.42, chela (without pedicel) length 1.02–1.18, hand (without pedicel) length 0.48–0.53, movable finger length 0.54–0.68. Leg I: trochanter 0.17–0.18/0.13–0.15, femur 0.21–0.24/0.13–0.14, patella 0.23– 0.29/0.11–0.12, tibia 0.30–0.37/0.09–0.10, tarsus 0.30–0.35/0.07. Leg IV: trochanter 0.28–0.32/0.17–0.18, femur + patella 0.71/0.13–0.15, tibia 0.51–0.55/0.10–0.12, tarsus 0.39–0.42/0.08–0.10, TS=0.57.
♂
: Total length 2.77. Carapace 0.72/0.64. Pedipalps: trochanter 0.40/0.22, femur 0.63/0.28, patella 0.65/0.28, chela (with pedicel) 1.15/0.37, chela (without pedicel) length 1.01, hand (without pedicel) length 0.48, movable finger length 0.61. Leg I: trochanter 0.15/0.14, femur 0.21/0.14, patella 0.25/0.12, tibia 0.33/0.09, tarsus 0.30/0.08. Leg IV: trochanter 0.26/0.15, femur + patella 0.59/0.11, tibia 0.42/0.10, tarsus 0.38/0.09, TS=0.55.
Remarks.
This new species is close related to
N
.
troglobius
Mahnert, 2009
(
Hubei
,
China
), but can be distinguished by the stouter pedipalp (chela (with pedicel) 3.10 (
♂
) 2.62–2.68 (
♀
) times longer than board versus 3.40–3.80 (
♂
,
♀
) in
N
.
troglobius
) and the position of trichobothrium (s
t
situated midway between
sb
and
t
in
N
.
pseudotroglobius
sp. nov.
;
st
closer to
t
than to
sb
in
N
.
troglobius
) (
Mahnert 2009
).
This new species can be distinguished from
N
.
lipsae
Mahnert, 2003
(
Yunnan
,
China
) by the stouter legs I (patella 2.07 (
♂
) 2.09–2.41 (
♀
) times longer than deep
vs
3.50 (
♀
) in
N
.
lipsae
; tibia 3.86 (
♂
) 3.33–3.70 (
♀
) times longer than deep
vs
5.00 (
♀
) in
N
.
lipsae
), and by the position of trichobothrium (s
t
situated midway between
sb
and
t
in
N
.
pseudotroglobius
sp. nov.
, whereas s
t
closer to
t
than to
sb
in
N
.
lipsae
) (
Mahnert 2003
).
Geographically, only one species,
N
.
spalacis
Beier, 1955
, is described in Asia (
Israel
). The new species can be distinguished from
N
.
spalacis
by having slender legs IV (femur + patella 5.50 (
♂
) 5.46–5.50 (
♀
) times longer than deep versus 3.70 (
♂
) in
N
.
spalacis
) and the different position of trichobothrium (
est
situated midway between
et
and
esb
in
N
.
pseudotroglobius
sp. nov.
, whereas
est
closer to
et
than to
esb
in
N
.
spalacis
) (
Beier 1955
).
Distribution.
Known only from the
type
locality in
Guizhou
,
China
.
Habitat.
All specimens were collected under a rock within the dark zone of the cave.