A new species and a new record of Caligonellidae (Acari: Raphignathoidea) from Russia
Author
Khaustov, Alexander A.
text
Persian Journal of Acarology
2024
2024-01-15
13
1
1
11
https://www.mendeley.com/catalogue/b71d5021-0b82-3489-970e-a1498cb1bdc2/
journal article
10.22073/pja.v13i1.83381
2251-8169
10943383
urn:lsid:zoobank.org:pub:687DA78A-3B5B-4E5D-8329-6488FA67AC7B
Neognathus beshtauiensis
sp. nov.
(
Figs. 1–3
)
http://zoobank.org/
urn:lsid:zoobank.org: act:
DE51827D-445C-4A7F-B904-F4A95241DDFF
Diagnosis
Female
– Cupuli
ia
well developed, tarsi III and IV with eight setae each (
vs
present), genua III and IV with two setae each, tarsus IV without solenidion, tibia IV without solenidion, palpgenu with one seta, stylophore without lateral projections, peritremes with 5–6 pairs of segments, two pairs of pseudanal setae.
Description
Female (
Figs. 1‒3
)
– Length of idiosoma 265 (240‒250), width 160 (135‒140).
Idiosomal dorsum
(
Fig. 1A
)
‒ Ovate. Dorsal idiosomal striae thin. Dorsal setae smooth, pointed. Cupules
ia
,
im
and
ip
large, almost round;
ia
located posterolaterad
c1
,
im
posterolaterad
d
, and
ip
anterolaterad
f
. Lengths of dorsal setae:
vi
8 (8–9),
ve
12 (12),
sci
13 (13–14),
sce
12 (12–13),
c1
12 (12),
c2
12 (11–12),
d
14 (13–14),
e
13 (12–13),
f
13 (11–12),
h1
11 (10–11),
h2
13 (11–12).
Figure 1.
Neognathus beshtauiensis
sp. nov.
(female) –
A.
Idiosomal dorsum;
B.
Idiosomal venter.
Idiosomal venter
(
Fig. 1B
)
‒ All ventral setae smooth and pointed. Four pairs of aggenital and two pair of genital setae; cupuli
ih
located anterolaterad
ag4
. Anal valves with two pairs of pseudanal setae. Two longitudinal groups of tiny sclerites situated between setae
4a
and
ag1
. Lengths of ventral setae:
1a
20 (20‒22),
1b
15 (15‒18),
1c
16 (16‒18),
2c
19 (19‒20),
3a
20 (20‒23),
3c
16 (16‒20),
4a
19 (19‒20),
4c
16 (14‒16),
ag1
16 (16‒18),
ag2
15 (15‒18),
ag3
13 (13‒18),
ag4
11 (11‒13),
g1
15 (15‒17),
g2
15 (15‒16),
ps1
11 (11),
ps2
11 (11‒13).
Gnathosoma
(
Fig. 2
)
‒ Stylophore width 38 (38‒40); peritremes with 5–6 pairs of segments; cheliceral stylets 30 (30‒31), slightly curved; cheliceral levers poorly visible, about three times shorter than cheliceral stylets. Palpal supracoxal setae (
ep
) short, peg-like; palpal chaetotaxy: Tr 0, Fe 1 (
d
), Ge 1 (
d
), Ti 3 (
d
,
l’
,
l”
), Ta 8(1) (
ba
,
bp
,
lp
,
va
,
acmϛ
,
ul’ϛ
,
ul”ϛ
,
sulϛ
,
ω
); tibial claw well developed, slightly hooked; all palpal setae smooth, eupathidia
acmϛ
,
ul’ϛ
,
ul”ϛ
,
sulϛ
blunt-tipped, other palpal setae pointed. Subcapitulum with delicate striae in basal part; all subcapitular setae smooth and pointed; lengths of subcapitular setae:
m
16 (16‒18),
n
37 (37‒38),
or1
11 (11‒12),
or2
11 (11‒12), length of palptarsal solenidion
ω
4 (4).
Figure 2.
Neognathus beshtauiensis
sp. nov.
, female –
A.
Gnathosoma
, dorsal aspect;
B.
Subcapitulum.
Legs
(
Fig. 3
)
‒ Lengths of legs: I 165 (170‒180), II 125 (125‒130), III 125 (125‒130), IV 155 (155‒160). Leg I (
Fig. 3A
). Leg setation: Tr 1 (
v’
), Fe 3 (
d
,
l’
,
bv”
), Ge 6 (
d
,
l’
,
l”
,
v’
,
v”
,
k
), Ti 5(2) (
dϛ
,
l’
,
l”
,
v’
,
v”
,
φ
,
φp
), Ta 14(2) (
ft’ϛ
,
ft”ϛ
,
tc’ϛ
,
tc”ϛ
,
p’ϛ
,
p”ϛ
,
a’
,
a”
,
u’
,
u”
,
vsϛ
,
pv’
,
pl’
,
pl”
,
ω1, ω2
). Supracoxal seta of leg I (
el
) peg-like; all leg setae smooth; setae
d
of tibia, (
ft
), (
tc
), (
p
) and
vs
of tarsus eupathid-like, blunt-tipped; other leg setae pointed; solenidion
ω1
8 (8) digitiform, solenidion
ω2
11 (11) baculiform and curved, solenidion
φ
4 (4) digitiform, solenidion
φp
8 (8‒9) baculiform and curved, seta
k
3 (3). Leg II (
Fig. 3B
). Leg setation: Tr 1 (
v’
), Fe 3 (
d
,
l’
,
bv”
), Ge 6 (
d
,
l’
,
l”
,
v’
,
v”
,
k
), Ti 5(1) (
dϛ
,
l’
,
l”
,
v’
,
v”
,
φp
), Ta 9(2) (
ft’
,
tc’ϛ
,
tc”ϛ
,
a’
,
a”
,
u’
,
u”
,
pv
,
vs
,
ω1, ω2
). All leg setae smooth; setae
d
of tibia and (
tc
) of tarsus eupathid-like, blunt-tipped; other leg setae pointed; solenidion
ω1
7 (6‒7) digitiform, solenidion
ω2
8 (8) baculiform and curved, solenidion
φp
9 (7) baculiform, seta
k
3 (3). Leg III (
Fig. 3C
). Leg setation: Tr 2 (
l’
,
v’
), Fe 2 (
d
,
ev’
), Ge 2 (
d
,
v’
), Ti 4(1) (
d
,
l”
,
v’
,
v”
,
φp
), Ta 8(1) (
tc’
,
tc”
,
a’
,
a”
,
u’
,
u”
,
pv
,
vs
,
ω
). Solenidion
ω
10 (9) digitiform, solenidion
φp
9 (8) baculiform. All leg setae smooth and pointed. Seta
l”
of genu absent. Leg IV (
Fig. 3D
). Leg setation: Tr 1 (
v’
), Fe 2 (
d
,
ev’
), Ge 3 (
d
,
v’
), Ti 4 (
d
,
l”
,
v’
,
v”
), Ta 8 (
tc’
,
tc”
,
a’
,
a”
,
u’
,
u”
,
pv
,
vs
). Solenidia
ω
and
φp
absent. All leg setae smooth and pointed.
Figure 3.
Neognathus beshtauiensis
sp. nov.
(female) –
A–D.
Right legs I-IV respectively, dorsal aspect.
Male and immatures unknown
Type material
Female
holotype
, slide
ZISP
T-Cal-05,
Russia
,
Stavropol Krai
,
Beshtau mountain
,
44° 06' 13.1" N
,
43° 01' 13.0" E
,
30 July 2023
, in soil on the meadow,
1180 m
a.s.l.
, coll.
A.A. Khaustov.
Paratypes
:
2 females
, same data
.
Type deposition
The
holotype
and
one female
paratype
of the new species are deposited in the acarological collection of the
Zoological Institute
of RAS,
St. Petersburg
,
Russia
;
one paratype
is deposited in the mite collection of the
Tyumen State
University Museum of Zoology
,
Tyumen
,
Russia
.
Etymology
The name of the new species refers to its distribution in Beshtau mountain.
Differential diagnosis
The female of the new species is very similar to
Neognathus sibiriensis
in having large palptibial claw, absence of solenidion
ω
on tarsus IV, absence of lateral projections on stylophore, presence of two pairs of pseudanal setae, presence of well-developed cupuli
ia
, presence of three setae on femur I, presence of seta
k
on genu II, presence of two setae on genu III, presence of only one seta on palpgenu, and presence of seta
vs
on tarsi III and IV. The new species differs from
N
.
sibiriensis
by the absence of solenidion on tibia IV (solenidion on tibia IV present in
N. sibiriensis
), presence of two setae on genu IV (three setae in
N. sibiriensis
), and in having 5–6 pairs of segments in peritremes (four pairs in
N. sibiriensis
).