Two new species of the genus Elattoma (Acari: Heterostigmatina: Pygmephoridae) phoretic on Morimus verecundus (Coleoptera: Cerambycidae) from Iran
Author
Rahiminejad, Vahid
Author
Hajiqanbar, Hamidreza
Author
Fathipour, Yaghoub
text
Zootaxa
2011
2903
48
56
journal article
46766
10.5281/zenodo.204757
4dcf02e4-85fc-4faf-b086-762136189154
1175-5326
204757
Elattoma abeskoun
Rahiminejad and Hajiqanbar
sp. nov.
(
Figures 8–14
)
Differential diagnosis.
The new species resembles
E
.
cerambycidum
sp. nov.
but differs from it by solenidion φ2 shorter than φ1, seta
f
less than two times longer than setae
e
and seta
h
1 bluntly ended and shorter than seta
e
(solenidion φ2 longer than φ1, seta
f
more than 3 times longer than setae
e
and seta
h
1 pointed and longer than seta
e
in
E. cerambycidum
sp. nov.
). The new species is also closely related to
E
.
kornilovi
but differs from it by solenidion φ2 shorter than φ1 (solenidion φ2 longer than φ
1 in
E
.
kornilovi
), seta
e
longer than
h
1 (seta
h
1 longer than
e
in
E
.
kornilovi
), seta
f
less than two times longer than
e
(seta
f
more than two times longer than
e
in
E
.
kornilovi
), setae
h
1 bluntly ended (setae
h
1 pointed in
E
.
kornilovi
) and setae
c
1 and
c
2 subequal (setae
c
2 longer than
c
1 in
E
.
kornilovi
).
Phoretic female.
Length of idiosoma 179 (169–182), width 91 (90–97).
Gnathosoma
(
Figs. 8, 9
). Gnathosomal capsule subquadrangular, dorsally with a small median apodeme, one pair of cheliceral setae
ch
3 (3–4) needlelike and one pair of small postpalpal setae
pp
located anterolaterally to seta
ch
; ventrally with one pair of subcapitular setae
su
3 (4–5) needlelike; each palp dorsally with two needlelike setae
dFe
3 (3–4) and
dGe
2 (2–3),
dFe
longer than
dGe
, ventrally with accessory setigenous structure (
ass
), two small solenidia and one tiny rod-shape structure; chelicerae indiscernible; pharyngeal system (
Fig. 10
) with three pumps, pump 1 smallest, pump 2 the largest and striated, pump 3 oval-shaped.
FIGURES 8–10
.
Elattoma abeskoun
Rahiminejad & Hajiqanbar
sp. nov.
(female): 8. Dorsum of the body, 9. Venter of the body, 10. Pharyngeal system. Scale bar 50 Μm.
Idiosomal dorsum
(
Fig. 8
). Rounded stigmata visible in anterior part of prodorsal shield with conspicuous atria; all dorsal setae smooth and pointed except setae
h
1 which are blunt-ended; prodorsal shield with one pair of clavate trichobothria and three pairs of setae
v
1 12
(12–13),
v
2
8 (6–8) and
sc
2 17 (16–18),
v
1
longer than
v
2
, both shorter than
sc
2; all tergites smooth, tergite C with two pairs of setae
c
1 21 (20–21) and
c
2 21 (19–21),
c
1 and
c
2 subequal, posterior margin of tergite C concave medially; tergite D with seta
d
25 (24–27) and one pair of cupuli
ia
; tergite EF with two pairs of setae
e
14 (13–14) and
f
21 (18–23) and one pair of cupuli
im
, seta
f
less than two times longer than seta
e
; tergite H with only one pair of setae
h
1 12 (10–12) blunt-ended and one pair of cupuli
ih
; Distances between dorsal idiosomal setae:
v
1–
v
1 12
(11–12),
v
2–
v
2 29
(26–29),
sc
2–
sc
2 27 (27–30),
c
1–
c
1 36 (34–38),
c
2–
c
2 57 (51–60),
d–d
40 (40–43),
e–e
40 (39–43),
f–f
27 (25–28),
h
1–
h
1 27 (26–27).
FIGURES 11–14
.
Elattoma abeskoun
Rahiminejad & Hajiqanbar
sp. nov.
(female): 11–14. Legs I–IV, respectively. Scale bar 20 Μm.
Idiosomal venter
(
Fig. 9
). Ventral plates smooth; all ventral setae smooth and pointed except setae
ps
1 and
ps
2 which are needlelike. Apodemes 1 and 2 reaching to presternal apodeme (appr), sejugal apodeme (apsej) not reaching to appr, no apodemes III and V, apodeme IV vestigial, poststernal apodeme (appo) very short; posterior border of poststernal plate bi-parties; epimeres I with three pairs of setae 1
a
9 (7–9), 1
b
9 (7–9) and 1
c
10 (10–10), all subequal; epimeres II with two pairs of setae 2
a
11 (11–12) and 2
c
12 (12–13), 2
a
and 2
c
subequal; epimeres III with three pairs of setae 3
a
8 (8–10), 3
b
9 (8–9) and 3
c
10 (8–10), all subequal; epimeres IV with only one pair of seta 4
b
12 (11–12); tergite PS with two pairs of setae
ps
1 7 (6–8) and
ps
2 4 (3–4).
Legs.
Leg I (
Fig. 11
) thicker and shorter than other legs; setal formula: Tr1-Fe4-Ge2-TiTa17(2) (number of solenidia in parenthesis). Tibiotarsus with one large claw; solenidion φ1 6 (5–6) prominent and finger shaped; solenidion φ2 3 (3–4) finger shaped, φ2 shorter than φ1, with 6 eupathidial setae (
p’
,
p”
,
ft’
,
ft”
,
tc’
and
tc”
) bluntly ended, setae
pl’
and
pl”
whip-like,
pl’
longer than
pl”
, setae
d
whip-like and longest on leg I and less than two times longer than
pl’
, seta
v”
more than two times longer than
v’
, seta
l’
longer than
l”
; genu with seta
l”
longer than
l’
, seta
l’
needlelike; femur with seta
d
hook-like, seta
l”
longer than
l’
, seta
l’
needlelike, seta
v”
sparsely barbed and longer than
l’
and
l”
; trochanter with seta
v’
sparsely barbed.
Leg II (
Fig. 12
). Setal formula: Tr1-Fe2-Ge1-Ti4(1)-Ta6(1). Solenidion ω 3 (3–4) finger shaped, anterior to modified and spatulate seta
pl”
, seta
pv”
spine like, seta
tc”
whip-like and more than two times longer than
tc’
, seta
u’
needlelike, sometimes indiscernible in some species; tibia with one small finger shaped solenidion φ 2 (2–4), setae
d
and
v”
subequal, seta
l’
needlelike and subequal to length of its segment; genu with only one seta
l’
; femur with seta
d
shorter than
v”
; trochanter with seta
v’
weakly barbed.
Leg III (
Fig. 13
). Setal formula: Tr1–Fe1–Ge1–Ti4(1)–Ta6. Tarsus with seta
pl”
spatulate, setae
pv”
spine, seta
u’
needlelike, seta
tc”
whip–like and longest one on leg III; tibia with a small solenidion φ 2 (1–2), and four setae which setae
d
,
l’
and
v’
distinctly longer than seta
v”
; genu with seta
l’
needlelike, longer than seta
d
on femur; femur divided into basifemur and telofemur, seta
d
needlelike and inserted on telofemur; seta
v’
on trochanter smooth.
Leg IV (
Fig. 14
). Ambulacrum stalked; setal formula: Tr1-Fe2-Ge0-Ti3(1)-Ta6. Tarsus with seta
pl”
short, behind wipe-like and ultralong seta
tc”
; seta
u’
blunt-ended; seta
pv”
longer than
pv’
, both shorter than
tc’
; tibia with small solenidion φ 1 (1-1), seta
d
and
v’
subequal and both longer than
v”
; genu with no seta; femur divided into basifemur and telofemur, setae
d
and
v’
inserted on telofemur, seta
v’
almost two times longer than
d
; trochanter with seta
v’
smooth.
Male and larva unknown.
Type
material.
Holotype
female (1/1) phoretic on
Morimus verecundus
(
Coleoptera
:
Cerambycidae
) clinging to ventral surface, around coxae I–III, collected from Oak trees in Nokandeh forest, Golestan province, northern
Iran
,
36.41°N
,
53.54°E
, altitude
381 m
.
, coll. V. Rahiminejad,
26 August 2009
.
Paratypes
: more than
150 females
, same collection data as
holotype
.
Etymology.
The name of new species “
abeskoun
” is derived from one of the ancient names of the Caspian Sea to the northwest of the sampling site (Golestan province).