New taxa of pygmephoroid mites (Acari: Pygmephoroidea: Pygmephoridae, Neopygmephoridae) phoretic on Enoplotrupes sharpi (Coleoptera: Geotrupidae) from Thailand
Author
Khaustov, Alexander A.
Author
Frolov, Andrey V.
text
Zootaxa
2018
2018-07-02
4442
2
277
292
journal article
29764
10.11646/zootaxa.4442.2.5
0fea0081-d093-4611-89c2-316f9baf6ca4
1175-5326
1303125
8EB2105E-3EAA-444A-A20E-819AD215B3C3
Spatulaphorus enoplotruporum
sp. nov.
(
Figs 1–5
)
Description
. FEMALE (
Figs 1–5
). Body well sclerotized. Length of idiosoma 205 (175–240), width 120 (100–140).
Gnathosoma
(
Fig. 2
). Gnathosomal capsule, excluding palps, subrectangular, length 22 (19–24), width 22 (19–24). Dorsum with one pair of needle-like cheliceral setae (
сha
) 7 (5–7). Dorsal median apodeme absent. Postpalpal setae (
pp
) spine-like, situated laterally to setae
сha
. Ventral gnathosoma with one pair of smooth, pointed subcapitular setae
m
6 (5–7) and round pits situated posteriad to
m
. Palps with smooth setae
dFe
and
dGe
dorsolaterally, setae
dGe
pointed, about twice longer than needle-like
dFe
. Palps ventrally each with mushroomlike accessory setigenous structure (
ass
) and tiny solenidion. Palps terminated with small tibial claw and tiny eupathidium-like seta. Pharyngeal pump 2 with weak transverse striation; pharyngeal pump 1 small, butterfly-like; pharyngeal pump 3 oval, slightly smaller than oval pump 2 (
Fig. 2C
).
Idiosomal dorsum
(
Figs 1A
,
5A, C, E, G
). All dorsal shields with numerous tiny, barely discernable dimples (
Figs 5A, C, E, G
). Prodorsal shield with three pairs of setae (
v
1
,
v
2
,
sс
2), one pair of weakly barbed capitate trichobothria and one pair of round stigmata (
Fig. 5 C
). Stigmata associated with well developed tracheal trunks. All dorsal idiosomal setae blunt-ended and barbed. Cupules
ia
on tergite D,
im
on tergite EF and
ih
on tergite H large, round. Tergites D, EF and H each with one pair of oval porous areas. Lengths of dorsal setae:
v
1 23
(21–23),
v
2 13
(10–13),
sс
2 49 (45–54),
с
1 37 (30–38),
с
2 49 (44–54),
d
42 (39–48),
e
25 (23–31),
f
54 (44–58),
h
1 51 (45–57),
h
2 16 (16–21). Distances between setae:
v
1–
v
1 22
(20–23),
v
2
–v
2 39
(34–42),
sс
2
–sс
2 47 (39–49),
с
1–
с
1 46 (39–47),
с
1–
с
2 27 (23–29),
d–d
68 (55–74),
e–f
17 (14–17),
f–f
40 (31–46),
h
1–
h
1 26 (22–32),
h
1–
h
2 18 (14–20).
FIGURE 1
.
Spatulaphorus enoplotruporum
sp. nov.
, female: A—dorsum of the body, B—venter of the body. Legs omitted.
Idiosomal venter
(
Figs 1B
,
5B, D, F, H, I
). All ventral plates with numerous tiny dimples. Setae 1
b
and 2
с
pointed; other ventral setae with slightly rounded tips. Setae 1
b
and
ps
3 with a few barbs; setae
ps
1, 2 strongly barbed; other ventral setae smooth. Bases of setae
ps
3 situated distinctly anteriad bases of setae
ps
1-2. Apodemes 1 (ap1) and apodemes 2 (ap2) well developed and joined with thick prosternal apodeme (appr); sejugal apodeme (apsej) developed only laterally; apodemes 3 (ap3) weak, not reaching to poststernal apodeme (appo); apodemes 4 (ap4) well developed, exceeding beyond bases of setae 3
b
. Apodemes 5 (ap5) well developed, joined with appo and reaching beyond setae 4
a
. Anterior genital sclerite (ags) small, cup-like; posterior genital sclerite (pgs) small, oval, with lateral processes (
Figure
5I
). Posterior margins of posterior sternal plate weakly concave in middle part. Posterior margin of aggenital plate rounded. Lengths of ventral setae: 1
a
9 (9–10), 1
b
17 (15–21), 1
с
11 (10–12), 2
a
10 (10–11), 2
с
23 (18–23), 3
a
14 (12–16), 3
b
10 (9–11), 3
с
12 (11–14), 4
a
11 (10–13), 4
b
15 (14–17), 4
с
12 (12–14),
ps
1 22 (21–25),
ps
2 23 (21–25),
ps
3 18 (17–20).
Legs
(
Figs 3
,
4
). Leg I (
Fig. 3A
) slightly thicker than leg II. Setal formula:
1–4–2–17
(4). Tibiotarsus enlarged, with large claw. Setae (
u
) consolidated into a horn-like structure opposing to claw. Tarsal claw blunt-tipped. Seta
s
distinctly foliate distally; seta
pv”
slightly foliate distally. Seta
d
of femur spatulate, with short subterminal projection. Setae
l’
of femur
pl’
and
k
of tibiotarsus smooth; other leg setae (except eupathidia) sparsely barbed. Setae
l’
of femur, (
l
) of genu and
k
of tibiotarsus blunt-ended; other leg setae (except eupathidia) pointed. Lengths of solenidia
ω
1 8 (7–9),
ω
2 6 (5–7),
φ
1 8 (8–9),
φ
2 6 (5–6); Solenidion
φ
1 thick, clavate, other solenidia weakly clavate. Leg II (
Fig. 3B
). Setal formula: 1–3–1–4–6(1). Tarsus with padded claws and empodium with three lobes, one distal and two lateral. Solenidion
ω
6 (5–7), weakly clavate, solenidion
φ
absent. Setae (
pv)
of tarsus distinctly foliate distally; setae
d
and
l’
of femur blunt-ended; other leg setae pointed. Seta
u’
of tarsus smooth and thin; other leg setae barbed. Leg III (
Fig. 4A
). Femur divided into basi- and telofemur. Setal formula: 1–2–1–4–6. Claws and empodium of same shape as on tarsus II. Setae (
pv)
of tarsus distinctly foliate distally; setae
v’
of trochanter,
d
,
v’
of femur and
l‘
of genu blunt-ended; other leg setae pointed. Seta
u’
of tarsus smooth; other leg setae barbed. Leg IV (
Fig 4B
). Femur divided into basi- and telofemur. Setal formula: 1–2–0–4–6. Claws simple, empodium round, stalked. Setae
tс”
,
u’
, and (
pv
) slightly foliate distally (flattened tips difficult to discern in some specimens); setae
l’
,
v’
of tibia and t
с’
of tarsus pointed; other leg setae blunt-ended. Seta
pl”
of tarsus smooth, spiniform; other leg setae barbed.
MALE unknown.
FIGURE 2
.
Spatulaphorus enoplotruporum
sp. nov.
, female: A—gnathosoma in dorsal view, B—gnathosoma in ventral view, C—pharyngeal pumps.
FIGURE 3
.
Spatulaphorus enoplotruporum
sp. nov.
, female: A—right leg I in dorsal view, B—right leg II in dorsal view.
Type
material
. Female
holotype
, slide
ZISP
T-Pygm-001,
Thailand
,
Chiang Mai
,
X.1986
;
paratypes
:
19 females
, same data
,
4 females
,
Thailand
,
Chiang Mai
,
Mae Ai
,
VII.1992
,
N.Kagana.
Type
deposition
. The
holotype
and four
paratypes
are deposited in the collection of Zoological Institute of
RAS
,
Saint Petersburg
,
Russia
;
19 paratypes
are deposited in the collection of the
Tyumen State University Museum of Zoology
,
Tyumen
,
Russia
.
Differential diagnosis
. The new species is most similar to
S
.
сamerikae
Dastych and Rack, 1993
, described from
Botswana
(
Dastych & Rack 1993
), by the similar modifications of setae on tibiotarsus I and tarsus II, presence of apodemes 5, and characteristic position of setae
ps
3 anteriorly to
ps
1, 2. The new species differs from
S
.
сamerikae
by distinctly barbed setae
ps
1, 2 (vs. smooth in
S
.
сamerikae
), foliate setae on tarsi III and IV (vs. nonmodified in
S. сamerikae
) and by distinctly longer dorsal setae
d
39–48,
f
44–58,
h
1 45–57 (vs.
d
25–30,
f
24–31,
h
1
24–31
in
S
.
сamerikae
). The new species also similar to S.
langi
Dastych and Rack, 1993
, described from
Vietnam
(
Dastych & Rack 1993
), by the similar relative lengths of dorsal idiosomal setae and by the same number of modified foliate setae on tibiotarsus I and tarsi I and II. The new species differs from
S. langi
by non-modified setae
tс’
on tarsi II and III (vs. spiniform in
S. langi
), by setae
ps
1, 2 distinctly barbed and subequal to
ps
3 (vs.
ps
1, 2 smooth and distinctly shorter than
ps
3 in
S. langi
), and by setae 2
a
distinctly shorter than 2
с
(vs. 2
a
distinctly longer than 2
с
in
S
.
langi
).
Etymology
. The name of the new species refers to its association with beetles of the genus
Enoplotrupes
.