A new Aceria species (Acari: Eriophyoidea) on Echinops ritro L. subsp. ruthenicus (M. Bieb.) Nyman (Asteraceae) from Serbia and a supplement to the original description of Aceria brevicincta (Nalepa 1898)
Author
Vidović, Biljana
text
Zootaxa
2011
2796
56
66
journal article
10.5281/zenodo.205738
650f702e-3c1c-4961-abfd-88275f9828b6
1175-5326
205738
Aceria brevicincta
(
Nalepa, 1898
)
(
Figs. 3
&
4
)
Eriophyes brevicinctus
Nalepa, 1898
: 35
(22):234
Female: (n=10).
Body wormlike 147–155, 43-53 wide, white in colour.
Gnathosoma
16–22, downcurved. Dorsal genual setae (
d
) 4–5 long, cheliceral stylets 16–19 long.
Prodorsal shield
23–25 long, 23–26 wide; anterior half triangular, posterior part semielliptical, with a short lobe over gnathosoma. Prodorsal shield tubercles on rear margin of the shield 16–18 apart, scapular setae (
sc
) 47–54 projecting posteriorly. Prodorsal shield design consisting of one complete median line; two complete admedian lines; I submedian lines on anterior half, parallel to admedian; II submedian lines slightly mesally curved, approaching to admedian line on rear ¼ of shield; there are numerous dashes between II submedian line and lateral margin of shield. Legs with all usual segments and setae.
Leg
I
27–31 femur 7, femoral setae (
bv
) 8–10; genu 5–6, genual setae (
l"
) 25–29; tibia 5–7, tibial setae (
l’
) 6–8; tarsus 6–7, inner fastigial setae (
ft’
) 10–13, outer fastigial setae (
ft"
) 21–26; solenidion (ω) 8–9, slightly knobbed; empodium 5–6 and 6 rayed.
Leg
II
23–27; femur 6–7, femoral setae (
bv
) 9–11; genu 4–5, genual setae (
l"
) 9–11; tibia 4–5; tarsus 5–6, inner fastigial setae (
ft'
) 6, outer fastigial setae (
ft"
) 23–26; solenidion (ω) 9–10, slight knobbed; empodium 5–6 and 6 rayed.
Coxigenital area.
Coxal setae (
1b
) 9–11, 9–11 apart; coxal setae (
1a
) 17–22, 6–8 apart; coxal setae (
2a
) 40–42, 18–19 apart. Sternal line 4–6.
Genitalia
10–12, 18–20 wide, with 14–17 longitudinal striae in a single row. Coxal setae (3a) 14–17, 14–15 apart.
Opisthosoma
with subequal annuli, 71–81 dorsal annuli, 71– 80 ventral annuli, 8–9 coxogenital annuli. Annuli with rounded microtubercles, posterior ventral annuli with elongated microtubercles. Setae
c
2
27–32, 41–50 apart, on annulus 12–14; setae
d
55–58, 36–44 apart, on annulus 24– 29; setae
e
23–27, 19–23 apart, on annulus 40–45; setae
f
18–22, 16–17 apart, on annulus 64–73; setae
h2
69–79, 11 apart; setae
h1
6–7, 6–8 apart.
FIGURE 3.
Aceria brevicincta
(Nalepa, 1898)
: CG. coxigenital region of female; CS. lateral view of caudal region; DA. dorsal view of prodorsal shield; em. empodium; ES. lateral view of annuli; GM. genital region of male; IG. internal female genitalia; L1. leg I of female; SA. lateral view of anterior region.
FIGURE 4.
SEM photographs of
Aceria brevicincta
female: A. dorsal view of anterior region; B. ventral view of anterior region.
|
TABLE 2.
Comparison of measurements
|
of
Aceria brevicincta
(Nalepa, 1898)
|
females collected in Hungary and |
Serbia. |
| Morphometric Characters |
Hungary |
Serbia |
| Length of body |
200–230 |
147–155 |
| Width of body |
46 |
43–53 |
| Length of gnathosoma |
18 |
16–22 |
| Length of prodorsal shield |
34 |
23–25 |
|
Tubercles of
sc
apart
|
27 |
16–18 |
|
Length of setae
sc
|
36–40 |
47–54 |
| Length of leg I |
42 |
27–31 |
| Length of tibia |
7 |
5–7 |
| Length of tarsus |
8.5 |
6–7 |
| Length of empodium I |
7 |
5–6 |
| Number of rays on tarsal empodium |
5 |
6 |
| Length of leg II |
38 |
23–27 |
| Length of tibia |
6.5 |
4–5 |
| Length of tarsus |
8 |
5–6 |
| Length of empodium II |
7 |
5–6 |
| Number of opisthosomal annuli |
88 |
71–81 |
|
Length of seta
c2
|
30 |
27–32 |
|
Length of setae
d
|
50 |
55–58 |
|
Length of setae
e
|
30 |
23–27 |
|
Length of setae
f
|
25 |
18–22 |
|
Length of setae
h1
|
7 |
6–7 |
|
Length of setae
h2
|
70 |
69–79 |
| Width of female genitalia |
30–34 |
18–20 |
|
Length of setae
3a
|
17 |
14–17 |
Male (n=3).
Body wormlike 148–155, 43–45 wide.
Gnathosoma
18, dorsal genual setae (
d
) 4–5 long, cheliceral stylets 15–17.
Prodorsal shield
shape and design similar to female, 22–23, 23–25 wide. Tubercles of scapular setae (
sc
) located on rear margin of shield, 16–17 apart,
sc
39–45 long, projecting posteriorly.
Leg
I
28; femur 6–7, femoral setae (
bv
) 7–8; genu 4–5, genual setae (
l"
) 25–27; tibia 6–7, tibial setae (
l'
) 6–7; tarsus 5–6, inner fastigial setae (
ft'
) 12–14, outer fastigial setae (
ft"
) 21–23; solenidion (ω) 8–9, slightly knob; empodium 5 and 6 rayed.
Leg
II
22–24; femur 6–7, femoral setae (
bv
) 7–8; genu 4, genual setae (
l"
) 11–12; tibia 4–5; tarsus 5–6, inner fastigial setae (
ft'
) 5, outer fastigial setae
(ft"
) 24–25; solenidion (ω) 8–9, slightly knob; empodium 5 and 6 rayed.
Coxigenital area.
Coxal setae (
1b
) 8–10, 8–9 apart; coxal setae (
1a
) 12–15, 7 apart; coxal setae (
2a
) 31–33, 15–16 apart. Sternal line 5.
Genitalia
16–19 wide, coxal setae (
3a
) 11–12, 13–14 apart.
Opisthosoma
with subequal annuli: 72– 77 dorsal annuli, 69–72 ventral annuli, 8–9 coxogenital annuli. Annuli with microtubercles similar to that of females. Setae
c
2
23–25, 34–42 apart on annulus 12– 13; setae
d
45–53, 33–35 apart on annulus 24; setae
e
16–18, 18–19 apart on annulus 40–45; setae
f
17–19, 12–13 apart on annulus 65–67; setae
h2
60–66, 10–11 apart; setae
h1
6–7, 6 apart.
Nymph and larva.
Not found
Material examined.
10 females
(slides ## 157/1,157/4, 157/5, 157/6, 157/9, 157/13, 157/14, 157/16, 157/56 and157/57),
3 males
(slides ## 157/51, 157/52 and 157/54) collected from
Jurinea mollis
(L.)Rchb. (
Asteraceae
),
Serbia
, Deliblato Sands (Deliblatska peščara, Široka torina,
44o51.179’N
,
21o06.119’E
),
10 June 2007
coll. R. Petanoviċ;
40 females
(slides ## 157/2, 3, 7, 8, 10, 11, 12, 15, 17–38, 50,59–66),
2 males
(slides ## 157/53 and 157/55), the same collection details as previous;
26 females
(slides ## 291/1–26),
5 males
(slides ## 291/27–31) the same host, locality and collector on
22 June 2008
.
Host plant.
Jurinea mollis
(L.)Rchb. (
Asteraceae
)
Relation to host.
Vagrant on the lower leaf surfaces causing no visible damage.
Remarks.
A comparison of
A. brevicincta
from
Serbia
with the original description by
Nalepa (1898
,
1900
), is difficult because only 4 meristic and 2 morphometric characters of the female were presented. Females of
A. brevicincta
from
Serbia
are shorter and slightly wider than those from
Austria
. They also have 6-rayed empodia (5- rayed in the Austrian population), with
sc
setae that are twice as long. The female coverflap is not as wide and the annuli are slightly less numerous. There is a more detailed description of
A. brevicincta
from
Hungary
by
Farkas (1965
,
1966
). Females of
A. brevicincta
from
Serbia
are significantly smaller than specimens from
Hungary
. They also have a shorter prodorsal shield and the distance between the
sc
tubercles is less along with having shorter
sc
setae. The empodia in the population from
Serbia
are 6-rayed (5-rayed in the Hungarian population), with shorter legs and a narrower female coverflap. The annuli are also slightly fewer (Table 2).