Two eriophyoid mites (Acari: Eriophyoidea) associated with Ilex paraguariensis from Brazil
Author
Ferla, Noeli Juarez
text
Zootaxa
2017
2017-09-27
4324
2
363
370
journal article
31974
10.11646/zootaxa.4324.2.8
422d65eb-86d6-4793-a104-27a531e300f8
1175-5326
997804
1B66E547-98A2-4660-8247-75F9Da7Daebd
Genus
Dichopelmus
Keifer, 1959
Figs. 5–7
Dichopelmus notus
Keifer, 1959
: 10
–11.
Genus diagnosis
. Body fusiform, spindle–like and flattened; prodorsal shield subrectangular with naso rounded that projects well over the rostrum and hides it in dorsal view; setae
sc
present, placed in typical position on rear shield margin, directing setae divergently to the rear; all coxal and opisthosomal ventral setae present; legs with 6 segments (genu not fused with femur); with all usual setae and empodium divided.
FIGURE 5.
Dichopelmus notus
: D—dorsal habitus, female; V—ventral habitus, female.
FEMALE
(n=8). Body fusiform, (212–219), (87–88) wide; brownish in life.
Gnathosoma.
Pedipalp coxal seta (
ep
) not seen; pedipalp genual seta (
d
) (13), chelicerae (19–21) and oral stylets (19–21). Scapular seta (7) near the rear shield margin, with small tubercles.
Prodorsal shield
(45–55), (63–72) wide, partially smooth with longitudinal lines running ahead from dorsal tubercles; Anterior prodorsal shield with a prominent lobe.
Coxal plates
. Coxae I and II without granules, with a few short lines. Coxa I (15) with anterolateral setae on coxisternum I (
1b
) (10–11) and proximal setae on coxisternum I (
1a
) (13–14); sternal line faint present. Coxa II (14–15) with proximal setae on coxisternum II (
2a
) (25–28); coxigenital area with (9–11) annuli, microtuberculate.
Legs.
Legs with all segments;
Leg I
(49–54), trochanter (5–6), femur (13–14), basiventral femoral seta (
bv
) (11–13); genu (3– 4); antaxial genual seta (
l´´
) (18–21); tibia (6–8), paraxial tibial seta (
l´
) (8–10); tarsus (5–6), seta
ft´
(19–20), seta
ft´´
(20–22), seta
u´
(3), tarsal empodium (
em
) (3–4) divided, 4–rayed at each side, tarsal solenidion (
ω
) (4–5) strongly knobbed.
Leg II
(51–53), trochanter (5), femur (14–15), basiventral femoral seta (
bv
) (17–18); genu (3–4); antaxial genual seta (
l´´
) (3–4); tibia (7); paraxial tibial seta (
l´
) absent; tarsus (5–6), paraxial fastigial tarsal seta (
ft´
) (5), antaxial fastigial tarsal seta (
ft´´
) (17–19), paraxial unguinal tarsal seta (
u´
) (3), tarsal empodium (
em
) (4– 5) divided, 4–rayed at each side, tarsal solenidion (
ω
) (5–6) strongly knobbed.
Female genitalia.
Female genitalia (19–22) long, (22–24) wide, cover flap with proximal area smooth and distal half area with 14–16 striae (longitudinal lines) extending over distal half, occupying almost entire cover flap; proximal seta on coxisternum III (
3a
) (13–14).
Opisthosoma.
Opisthosoma dorsally and ventrally each with total of (20–22) annuli, with microtubercles on rear annular margins; Lateral seta
c2
(17–19); ventral seta I (
d
) (55–66) on ventral annuli 5; ventral seta II (
e
) (15–17) on ventral annuli 10; ventral seta III (
f
) (16–18) on 17th ventral annuli from anterior to posterior; accessory seta (
h1
) absent and caudal seta (
h2
) (51–54) tapering abruptly.
FIGURE 6.
Dichopelmus notus
: L1—Leg I; L2—Leg II.
FIGURE 7.
Dichopelmus notus
: A—View of prodorsum shield; B—Genital cover flap; C—View of opisthosoma showing microtubercle pattern. Scale bars: A, B and C = 20 µm
Material examined.
One female collected from Putinga (28°57´27.69´´S, 52°09´45.84´´O), Rio Grande do Sul,
19 February 2013
, on
Ilex paraguariensis
.
Seven females collected from Arvorezinha, Rio Grande do Sul,
19 February 2013
on
Ilex paraguariensis
. Specimens collected by Catiane Dameda and Angélica Bilhar Arce. The material examined was mounted on two slides. The slides are deposited at (ZAUMCN), UNIVATES.
Male
. Not found.
Relation to host plant
. This species lives on the leaf surface and is commonly known as rust mite on yerba mate. Its presence causes blight of new leaves, delaying their growth and causing their fall, directly affecting production. It has been responsible for considerable damage (
Coll & Caceres 1995
;
Santana
et al
. 1997
;
Meneguzzi
et al
. 2002
;
Gouvea
et al
. 2006
).
Distribution.
Argentina
,
Brazil
.