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
Genus
Nasutidania
gen. nov.
Type species:
Nasutidania orientalis
sp. nov.
Diagnosis
. FEMALE. Body oval. Gnathosomal capsule elongate, beak-like, its length almost three times longer than width, dorsally with two pairs of cheliceral setae (
сha
,
сhb
); postpalpal setae (
pp
) present; palps very long, with two pairs of dorsal setae (
dFe
,
dGe
). Palpal tibiotarsus without tibial claw and seta. Subcapitulum with one pair of setae
m
and round pits in posterior part; palps ventrally without accessory setigenous structure and solenidion; ventrolaterally with unusual oval depressions (dep). Rostrum of subcapitulum with several lateral short spiniform projections in distal half. Pharyngeal pumps tripartite, striated, situated closely to each other; pharyngeal pump 1 small, butterfly-like, pharyngeal pump 2 large, subrectangular and about three times longer than oval pump 3. Posterior margin of prodorsum slightly covered by anterior part of tergite C. Prodorsum with two pairs of simple setae (
v
2
,
sс
2), pair of clavate trichobothria (
sс
1) and small, round stigmata located just anteriorly to setae
v
2.
Dorsal idiosomal setae not modified. Tergite C with two pairs of setae (
с
1,
с
2); tergite D with one pair of setae (
d
) and round cupules
ia
; tergite EF with two pairs of setae (
e
,
f
); tergite H with two pairs of setae (
h
1,
h
2) and round cupules
ih
. Coxal fields I with two pairs of setae (1
a
, 1
b
); coxal fields II with two pairs of setae (2
a
, 2
b
); coxal fields III with three pairs of setae (3
a
, 3
b
, 3
с
); coxal fields IV with three pairs of setae (4
a
, 4
b
, 4
с
). Pseudanal segment with three pairs of setae (
ps
1-3). Ap1 and ap2 well developed and joined together and with appr, apsej well developed and joined with appr; ap3 very weak, linear, ap4 long, reaching distinctly beyond bases of setae 3
b
. Apodemes 5 vestigial, located near the bases of trochanters IV. Secondary transverse apodeme absent. Posterior margin of posterior sternal plate tripartite. Ags bell-like, pgs triangular, median genital sclerite (mgs) present. Ventral idiosomal setae not modified. Legs I and II subequal in length. Tibiotarsus I slightly thickened, with distinct claw directed laterally, situated on pretarsus; ventrodistal part of pretarsus with short and thick projection (fused unguinal setae); seta
d
of femur I hook-like, seta
k
long, pointed, seta-like. Claws on tarsus IV simple, distinctly thinner than padded claws on tarsi II and III. Tarsus IV not strongly elongate. Femora III–IV divided into basi- and telofemur. Leg setation: leg I; Tr 1 (
v’
), Fe 3 (
d
,
l’
,
v”
), Ge 4 (
l’
,
l”
,
v’
,
v”
), TiTa 16(4) (
d
,
l’
,
l”
,
v’
,
v”
,
k
,,
tс’
,
tс”
,
p”
,
ft’
,
ft”
,
pv’
,
pv”
,
pl’
,
pl”
,
s
,
ω
1,
ω
2,
φ
1,
φ
2); leg II: Tr 1 (
v’
), Fe 3 (
d, l’
,
v”
), Ge 3 (
l’
,
l”
,
v’
), Ti 4(1) (
d
,
l’
,
v’
,
v”
,
φ
), ta 6(1) (
tс’
,
tс”
,
pl”
,
pv’
,
pv”
,
u’
,
ω
); leg III: Tr 1 (
v’
), Fe 2 (
d
,
v’
), Ge 2 (
l’
,
v’
), Ti 4(1) (
d
,
l’
,
v’
,
v”
,
φ
), Ta 6 (
tс’
,
tс”
,
pl”
,
pv’
,
pv”
,
u’
); leg IV: Tr 1 (
v’
), F 2 (
d
,
v’
), Ge 1 (
v’
), Ti 4(1) (
d
,
l’
,
v’
,
v”
,
φ
), Ta 6 (
tс’
,
tс”
,
pl”
,
u’
,
pv’
,
pv”
).
Differential diagnosis
. The new genus is most similar to
Xystrorostrum
Mahunka
, 19681 by the presence of extremely long palps. The new genus differs from
Xystrorostrum
by the tripartite posterior margin of posterior sternal plate (vs. entire in
Xystrorostrum
), presence of a well developed median genital sclerite (vs. absent in
Xystrorostrum
), absence of the secondary transverse apodeme (vs. present in
Xystrorostrum
), presence of lateral cuticular projections on the rostrum of the subcapitulum (vs. absent in
Xystrorostrum
), and absence of an accessory setigenous structure and palpal solenidion (vs. present in
Xystrorostrum
).
FIGURE 5
. DIC micrographs of
Spatulaphorus enoplotruporum
sp. nov.
, female: A—general view dorsally, B—general view ventrally, C—prosoma in dorsal view, D—prosoma in ventral view, E—metapodosoma in dorsal view, F—metapodosoma in ventral view, G—opisthosoma in dorsal view, H—opisthosoma in ventral view, I—genital sclerites.
Species included
. The genus
Nasutidania
includes one species
N
.
orientalis
sp. nov
.
Distribution and habitats
.
Nasutidania orientalis
known only from the scarab beetles of the genus
Enoplotrupes
in
Thailand
.
Etymology
. The generic name is a combination of two words: Latin
nasutus
meaning
nosed
and
dania,
the second part of the generic name
Bakerdania
, the most abundant neopygmephorid genus.