A new genus and species of the family Microdispidae (Acari: Heterostigmata) associated with Trinervitermes trinervoides (Sjöstedt) (Isoptera: Termitidae) from South Africa
Author
Khaustov, Alexander A.
Author
Hugo-Coetzee, Elizabeth A.
Author
Ermilov, Sergey G.
Author
Theron, Pieter D.
text
Zootaxa
2019
2019-07-26
4647
1
104
114
journal article
25556
10.11646/zootaxa.4647.1.10
133114e1-dc8b-49d9-8437-ad32020adbea
1175-5326
3352845
005ACBF9-7A5E-4C1B-A12D-68BB48393097
Sidorchukdispus ekaterinae
sp. nov.
(
Figs 1–8
)
Description.
FEMALE (
Figs 1–8
). Length of idiosoma 150 (140–160), width 80 (80–85).
Gnathosoma
(
Figs 2
,
5
,
6E, F
,
7C
). Length of gnathosoma 16 (16–18), width 15 (14–15). Dorsal median apodeme absent. Length of cheliceral stylets: 12 (11–13). All gnathosomal setae needle-like and smooth. Lengths of gnathosomal setae
cha
5 (5),
chb
5 (5),
pp
3 (3),
m
6 (5–6),
dFe
4 (4),
dGe
5 (4–5). Pharyngeal pumps as in figure 2.
Idiosomal dorsum
(
Figs 1A
,
6
A–D). Stigmata elongate, located dorsolaterally and covered by lateral flanges of prodorsum. Tergites C, D, EF and lateral plates with distinct scale-like sculpture (
Figs 6
A–C). All dorsal setae slightly thickened, weakly blunt-ended. Setae
sc
2
and
c
1
smooth, setae
d
and
f
with two minute barbs near the base, other setae distinctly barbed. Trichobothria with long stem, clavate, sparsely barbed, with rounded apex. Tiny round pits (probably remnants of alveoli of setae
v
2
) located anterolaterally to bases of setae
sc
2
. Lengths of dorsal setae:
sc
2
25 (24–27),
c
1
29 (27–29),
c
2
17 (16–23),
d
29 (27–29),
e
25 (23–25),
f
29 (28–31),
h
1
28 (28–30),
h
2
34 (33–34). Distances between setae:
sc
2
–sc
2
19 (19–20),
c
1
–
c
1
32 (29–32),
c
1
–
c
2
12 (12–13),
d–d
21 (18–23),
e–f
16 (14–17),
f–f
20 (20–24),
h
1
–
h
1
9 (8–9),
h
1
–
h
2
10 (10–11).
FIGURE 3
.
Sidorchukdispus ekaterinae
gen., sp. nov.
, female: A—left leg I in dorsal view, B—Left leg II in dorsal view.
Idiosomal venter
(
Figs 1B
,
7A, B
). Aggenital and posterior part of posterior sternal plates with scale-like microsculpture. All ventral setae pointed. Setae 1
b
,
ps
1
, and
ps
3
distinctly barbed, other ventral setae smooth. Lateral plates with several oblique sclerotized lines laterally to legs III–IV. Posterior margin of aggenital plate evenly rounded. Lengths of ventral setae: 1
a
17 (17–19), 1
b
17 (17–20), 2
a
25 (24–27), 2
b
22 (21–23), 3
a
19 (18–21), 3
b
23 (21–23), 3
c
18 (17–18), 4
a
25 (24–26), 4
b
30 (28–31), 4
c
25 (24–26),
ps
1
22 (21–23),
ps
3
19 (19–20).
Legs
(
Figs 3
,
4
,
7
D-F). Leg I (
Fig. 3A
). Lengths of solenidia
ω
1
8 (8–9),
φ
1
5 (5),
φ
2
7 (7–8);
ω
1
large, fingershaped,
φ
1
clavate,
φ
2
baculiform. Setae
v’
of trochanter,
v”
of femur,
l”
of genu,
k
,
pl”
and (
pv
) of tibiotarsus smooth; other setae (except eupathidia) barbed. Setae
l’
of femur and (
l
) of genu blunt-ended; other setae (except eupathidia) pointed. Leg II (
Figs 3B
,
7E
). Solenidion
ω
5 (5) prominent, finger-shaped, solenidion
φ
3 (3) (
Fig. 7E
) weakly clavate, located in depression. Setae
d
of femur and tibia weakly blunt-ended, other setae pointed. Setae
v’
of trochanter,
l’
,
v”
of femur,
v’
of genu,
l’
of tibia,
pl”
,
tc”
and
pv”
of tarsus smooth; other setae barbed. Seta
v”
of femur very small, 1–2 long. Leg III (
Figs 4A
,
7F
). Solenidion
ω
5 (5) prominent, finger-shaped, solenidion
φ
2 (2) weakly clavate, located in depression (
Fig. 7F
). Seta
d
of femur weakly blunt-ended, other setae pointed. Setae
tc’
and
pv”
of tarsus smooth; other setae barbed. Leg IV (
Fig. 4B
). Setae
v”
of tibia and
tc’
of tarsus smooth, other setae barbed. Seta
v’
of trochanter,
d
of femur and tibia blunt-ended, other setae pointed. Tibia IV without solenidia, but with pore-like structure visible on its typical insertion point.
FIGURE 4
.
Sidorchukdispus ekaterinae
gen., sp. nov.
, female: A—left leg III in dorsal view, B—Left leg IV in dorsal view.
Type material.
Female
holotype
, slide VK
161018
,
South Africa
,
North West Province
, near
Potchefstroom
,
Faan Meintjes Nature Reserve
,
26°42’S
26°42’E
, on termites
Trinervitermes trinervoides
(Sjöstedt)
,
16 October 2018
, collected by
V.A. Khaustov
, S.G. Ermilov
;
paratypes
:
36 females
, same data
.
FIGURE 5
. DIC micrographs of
Sidorchukdispus ekaterinae
gen., sp. nov.
, female: A—gnathosoma in dorsal view, B—gna-thosoma in ventral view. St—cheliceral stylets, lev—levers of cheliceral stylets.
Type deposition.
The
holotype
and
10 paratypes
are deposited in the acarological collection of the National Museum, Bloemfontein,
South Africa
(
NMBS
), other
paratypes
are deposited in the mite collection of the Tyumen State University Museum of Zoology,
Tyumen
,
Russia
(
TSUMZ
)—
Zhang (2018)
.
Etymology.
The new species is named after the late Dr Ekaterina Sidorchuk.