A new species, new genus and new records of heterostigmatic mites (Acari: Heterostigmata) phoretic on scarab beetles of the subfamily Orphninae (Coleoptera: Scarabaeidae)
Author
Khaustov, Alexander A.
Author
Frolov, Andrey V.
text
Zootaxa
2018
2018-11-07
4514
2
181
201
journal article
28019
10.11646/zootaxa.4514.2.3
7e11cb7b-ab7c-4a1d-9e86-e00521d205b9
1175-5326
2607894
06EF10B9-0C0A-4850-8CF6-2F69B07BB642
Premicrodispus
(
Premicrodispus
)
hajiqanbari
sp. nov.
(
Figs 1–5
)
Description
. FEMALE (
Figs 1–5
). Length of idiosoma 135 (135–165), width 92 (88–98).
Gnathosoma
(
Fig. 2
). Gnathosomal capsule elongate, length 18 (19–20), width 12 (12–13). Dorsum with one pair of smooth and pointed cheliceral setae (
cha
) 9 (9–11). Dorsal median apodeme present in posterior part. Postpalpal setae (
pp
) stiff, setalike and weakly blunt-ended, situated anterolaterally to setae
cha
. Ventral gnathosoma with one pair of smooth, pointed subcapitular setae
m
(9). Palps with smooth, pointed and subequal setae
dFe
7 (7–8) and
dGe
8 (7–8) dorsolaterally. Palpi ventrally each with tube-like accessory setigenous structure (
ass
). Palps terminated with small tibial claw and tiny eupathidium-like seta. Pharyngeal pumps grouped together. Pharyngeal pump 1 very small, with few transverse stria; pharyngeal pump 2 large, subrectangular, distinctly transversely striated; pharyngeal pump 3 oval, smooth, about two times shorter than pump 2.
FIGURE 1
.
Premicrodispus
(
Premicrodispus
)
hajiqanbari
sp. nov.
, female: A—dorsum of the body, B—venter of the body. Legs omitted.
FIGURE 2
.
Premicrodispus
(
Premicrodispus
)
hajiqanbari
sp. nov.
, female: A—gnathosoma in dorsal view, B—gnathosoma in ventral view.
Idiosomal dorsum
(
Figs 1A
,
5A
). Only posterior part of prodorsum covered by anterior part of tergite C. All dorsal shields with numerous tiny, barely discernable dimples (
Fig. 5A
). Prodorsal shield with one pair of setae (
sc
2
), one pair of weakly barbed capitate trichobothria and one pair of oval stigmata. Stigmata associated with well developed tracheal trunks. Setae
c
1
and
h
2
smooth, other setae weakly barbed, setae
d
sometimes with only one subapical barb. Setae
d
and
f
blunt-ended, other dorsal setae pointed. Cupules
ia
on tergite D not evident in all specimens,
ih
on tergite H large, rhombic. Posterior part of tergite C and central parts of tergites D and EF with few short sclerotized lines; bases of setae
e
associated with linear, oblique sclerotized ridge. Lateral plates with well developed oblique sclerotized lines. Lengths of dorsal setae:
sc
2
31 (31–33),
c
1
30 (29–32),
c
2
37 (39–40),
d
21 (19– 20),
e
26 (26),
f
23 (21–22),
h
1
26 (26–28),
h
2
16 (15–16). Distances between setae:
sc
2
–sc
2
33 (33–35),
c
1
–
c
1
31 (31–32),
c
1
–
c
2
19 (20),
d–d
32 (31–32),
e–f
9 (9–10),
f–f
43 (43–44),
h
1
–
h
1
18 (15–17),
h
1
–
h
2
16 (18–20).
Idiosomal venter
(
Figs 1B
,
5B, C
). All ventral plates with numerous tiny dimples (
Fig. 5C
). All ventral setae smooth and pointed. Setae 1
a
, 3
b
, 3
c
, 4
b
and 4c distinctly thickened basally (
Figs 1B
,
5B, C
). Apodemes 1 (ap1) not visible, apodemes 2 (ap2) well developed and joined with prosternal apodeme (appr); sejugal apodeme (apsej) well developed, thick; apodemes 3 (ap3) very weak, linear, joined with poststernal apodeme (appo); apodemes 4 (ap4) well developed, exceeding beyond bases of setae 3
b
. Apodemes 5 absent. Anterior genital sclerite (ags) small, cup-like; posterior genital sclerite (pgs) small, oval. Anterior margin of posterior sternal plate with large median lobe. Posterior margin of aggenital plate rounded. Setae 4
a
and
ps
2
absent. Lengths of ventral setae: 1
a
8 (12), 1
b
16 (17–18), 2
a
22 (21–23), 2
b
29 (28–30), 3
a
15 (16–17), 3
b
11 (10–12), 3
c
11 (10–11), 4
b
15 (13–16), 4
c
11 (9–14),
ps
1
16 (15–16),
ps
3
26 (27–28).
FIGURE 3
.
Premicrodispus
(
Premicrodispus
)
hajiqanbari
sp. nov.
, female: A—left leg I in dorsal view, B—left leg II in dorsal view.
FIGURE 4
.
Premicrodispus
(
Premicrodispus
)
hajiqanbari
sp. nov.
, female: A—left leg III in dorsal view, B—left leg IV in dorsal view.
Legs
(
Figs 3
,
4
). Leg I (
Fig. 3A
). Setal formula:
1–3–4–15
(3). Solenidion
ω
2
absent. All solenidia fingershaped. Lengths of solenidia
ω
1
7 (7),
φ
1
8 (8–9) and
φ
2
6 (7). All setae (except eupathidia) pointed. Setae
d
,
v”
of femur,
l’
of genu and (
pv
) of tibiotarsus weakly barbed, other setae smooth. Leg II (
Fig. 3B
). Setal formula: 1–3–3– 4(1)–6(1). Tarsus with simple hooked claws and flipper-like empodium. Solenidia
ω
4 (4) and
φ
5 (5) weakly clavate. All setae pointed. Setae
v’
of trochanter,
pl”
and
tc’
of tarsus weakly barbed; other setae smooth. Leg III (
Fig. 4A
). Femur divided into basi- and telofemur. Setal formula: 1–2–2–4(1)–6. Claws and empodium of same shape as on tarsus II. Solenidion
φ
3 (3) short, weakly clavate. All setae pointed. Setae
v’
,
l’
of genu and
l’
of tibia weakly barbed; other setae smooth. Leg IV (
Fig 4B
). Femur divided into basi- and telofemur. Setal formula: 1–2– 1–4–6. Solenidion
φ
absent. Claws and empodium as on tarsus III, but smaller. All setae pointed. Setae
d
of femur,
d
,
v’
of tibia, and
tc’
of tarsus weakly barbed; other setae smooth.
MALE and LARVA unknown.
Type material
. Female
holotype
, slide
ZISP
T-Mcd-001,
on
Orphnus luminosus
Benderitter
,
Central African Republic
, Haute-Sangha [
Mambéré-Kadéï
],
P.A. Ferreire
leg.
;
paratypes
:
3 females
, same data
.
Type deposition
. The
holotype
and one
paratype
are deposited in the collection of Zoological Institute of RAS,
Saint Petersburg
,
Russia
; two
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
P
.
akermanae
(Sevastianov and Zahida Al Douri, 1988)
by the presence of only three solenidia on tibiotarsus I. The new species differs from
P
.
akermanae
by the absence of setae
ps
2
(vs. present in
P
.
akermanae
). The new species differs from all the described species of the genus
Premicrodispus
by its modified, thickened basally setae 1
a
, 3
b
, 3
c
, 4
b
, and 4
c
(vs. simple in other
Premicrodispus
species).
Etymology
. The new species is named after Iranian acarologist Hamidreza Hajiqanbar for his contribution to study of insect-associated heterostigmatic mites.