A new eriophyoid mite genus and species, Gymnaceria cupuassu (Acari: Eriophyidae), described from the cupuaçu tree in Brazil
Author
Oliveira, Anibal R.
Author
Rodrigues, Daniela F. S.
Author
Flechtmann, Carlos H. W.
text
Zootaxa
2012
3559
53
57
journal article
10.5281/zenodo.282937
2b806b58-a3c1-4931-959d-5cef4e03fc4e
1175-5326
282937
Gymnaceria cupuassu
n. sp.
(
Figs. 1–2
)
Diagnosis.
As
for the new genus above.
FEMALE
(n=6). Body elongated, vermiform, 199 (137–205), from anterior end of shield to anal lobes, 43 (35–46) wide.
Gnathosoma
projecting obliquely downwards; basal seta (
ep
) 3 (2–3); antapical seta (
d
) 5 (4–5), simple and slightly geniculate; chelicera 13 (12–17).
Prodorsal shield
subtriangular, 23 (20–26) long, 34 (27–34) wide; median line (
m
) incomplete, prominent in posterior 2/3 of shield, frequently interrupted in middle; admedian lines (
ad
) complete, slightly diverging towards rear and somewhat recurved inward posteriorly; first and second submedian lines (
sm1
and
sm2
) incomplete, converging posteriorly, running from anterior margin to middle of shield. Lateral side of shield with short lines and granules. Scapular tubercles near posterior margin of shield, 13 (8–14) apart; scapular seta (
sc
) 19 (18–21), directed posteriorly and divergent.
Coxisternal region.
Internal coxisternal apodeme conspicuous, 6 (6–8). Coxal seta I (
1b
) 7 (6–7), 8 (7–9) apart; coxal seta II (
1a
) 17 (13–18), 8 (6–8) apart; coxal seta III (
2a
) 36 (20–39), 18 (14–18) apart; coxisternal area with 5 (4–7) annuli separating coxae from genital coverflap, microtuberculate.
Legs
with all segments and usual setae present. Leg
I
26
(24–29); femur 9 (9–10), femoral seta (
bv
) 9 (7–9); genu 4 (3–4), genual seta (
l"
) 18 (16–20); tibia 5 (4–6), tibial seta (
l'
) 6 (4–6); tarsus 6 (5–8), lateral seta (
ft"
) 18 (18–20), dorsal seta (
ft'
) 13 (9–15), unguinal seta (
u'
) 2 (2–4), solenidion (ω) 8 (7–9); empodium 6 (4–6), 6-rayed, each ray (except first) further divided into two branches each. Leg
II
22
(20–26); femur 9 (7–9),
bv
8 (6–8); genu 3 (3–5),
l"
5 (4–7); tibia 3 (3–4); tarsus 5 (5–6),
ft"
17 (16–20),
ft'
4 (3–5),
u'
4 (2–4), ω 10 (9–11); empodium 5 (4–7), 6 (5–6) rayed.
External genitalia
9 (9–13) long, 18 (16–19) wide, with 15 (10–15) longitudinal ribs; genital seta (
3a
) 9 (7–10).
Opisthosoma
with 72 (71–82) dorsal annuli and 65 (61–70) ventral annuli. Annuli mostly continuous dorsoventrally, microtuberculated and subequal in most of opisthosoma, except in 12–15 posterior annuli which are smooth and broader dorsally. Lateral seta (
c2
) 17 (14–20), on annulus 4 (3–5); ventral seta I (
d
) 45 (30–50), on annulus 16 (12–17), 34 (29–36) apart; ventral seta III (
f
) 17 (14–17), on annulus 6 (5–6), 13 (11–13) apart; caudal seta (
h2
) 50 (48–54); accessory seta (
h1
) 3 (3–4). Dorsal seta (
c1)
and ventral seta II
(e)
absent.
FIGURE 1.
Gymnaceria cupuassu
n. gen.
et n. sp.
, female.
D.
Dorsal habitus;
V.
Ventral habitus.
FIGURE 2.
Gymnaceria cupuassu
n. gen.
et n. sp. L.
Lateral habitus, female;
OL.
Opisthosoma lateral, female;
E.
Ven t ral view of empodium, Leg I, female;
IGF.
Internal genitalia, female;
GM.
External genitalia, male;
L1.
Leg I, antiaxial view, female;
L2.
Leg II, antiaxial view, female.
MALE
(n=3). Generally smaller than female, body 104–144 long, 33–48 wide.
Gnathosoma
ep
2,
d
4, chelicera 8–12.
Prodorsal shield
19–31 long, 26–33 wide;
sc
13–18, 10–12 apart.
Coxisternal region.
Internal coxisternal apodeme 6–7;
1b
5–6, 7–8 apart;
1a
10–13, 6–7 apart;
2a
20–28, 13–17 apart; 5–7 coxisternal annuli.
Legs.
Leg
I
20–25
; femur 7–11,
bv
6–10; genu 4,
l"
13–19; tibia 4–5,
l'
3–5; tarsus 5–6,
ft"
11–14,
ft'
10–13,
u'
2, ω 6–7; empodium 4–5, 6-rayed. Legs
II
18–22
; femur 6–8,
bv
5–6; genu 2–3,
l"
4–5; tibia 3; tarsus 4–5,
ft"
12–17,
ft'
3–4,
u'
2–3, ω 7–10; empodium 4–5, 6-rayed.
External genitalia
8–10 long, 12–15 wide;
3a
4–9.
Opisthosoma
with 64–72 dorsal annuli and 55–61 ventral annuli.
c
2
14–17, on annulus 1;
d
31–37, on annulus 13, 25–27 apart;
f
14–15, on annulus 6, 10–11 apart.
h2
40–65;
h1
4.
c1
and
e
absent.
NYMPH
(n=4). Body 101–112 long, 36–39 wide.
Gnathosoma
ep
2,
d
3–4, chelicera 10–14.
Prodorsal shield
21–23 long, 29–36 wide;
sc
12–14, 11–12 apart.
Coxisternal region.
Internal coxisternal apodeme 4–5;
1b
4–7, 3–6 apart;
1a
5–9, 4–6 apart;
2a
12–19, 10–12 apart.
Legs.
Leg
I
15–17
; femur 4–7,
bv
3–4; genu 3–4,
l"
11–13; tibia 3–4,
l'
3–5; tarsus 3–5,
ft"
11,
ft'
5–10,
u'
1–2, ω 5–6; empodium 3, 5-rayed. Legs
II
12–15
; femur 4–5,
bv
3–4; genu 2–3,
l" 3
–4; tibia 2–3; tarsus 3–4,
ft"
13–14,
ft'
2–3,
u'
1, ω 7–8; empodium 3, 5-rayed.
Genitalia
absent.
Opisthosoma
with 74–78 dorsal annuli and 46–53 ventral annuli posterior to seta
3a
; 11 annuli anterior to seta
3a
;
3a
3–4, on annulus 12;
c
2
7–11, on annulus 12–14;
d
20–29, on annulus 24–28, 24–25 apart;
f
10–12, on annulus 5–6, 9–11 apart.
h
2
25–29;
h1
2–3.
c1
and
e
absent.
LARVA
(n=2). Body 80–82 long, 23–32 wide.
Gnathosoma
ep
1,
d
2–3, chelicera 13–14.
Prodorsal shield
15–16 long, 20–22 wide;
sc
13.
Coxisternal region
1a
5–9;
2a
8–10.
Legs.
Leg
I
11
; femur 4,
bv
3–4; genu 2,
l"
11; tibia 2,
l'
2; tarsus 3,
ft"
9,
ft'
7–8,
u'
1, ω 5–6; empodium 3, 5-rayed. Leg
II
9–10
; femur 4–5,
bv
3; genu 1–2,
l"
4; tibia 1–2; tarsus 2–3,
ft"
7–10,
ft'
2,
u'
1, ω 5–8; empodium 2–3, 5-rayed.
Genitalia
absent.
Opisthosoma
with 74–76 dorsal annuli and 46 ventral annuli posterior to seta
3a
; 10 annuli anterior to seta
3a
;
3a
2, on annulus 11;
c2
3–4, on annulus 12–13;
d
7–8, on annulus 22, 16 apart;
f
9–10, on annulus 4, 6–8 apart.
h
2
16–17;
h1
2;
c1
and
e
absent.
Type
material.
Female
holotype
and about 700
paratypes
, including females, males, nymphs and larvae collected from immature fruits, buds, flowers, young leaves and branches of
Theobroma grandiflorum
, Ilhéus
, Bahia,
Brazil
. Six microscopic slides with specimens collected from the campus of the
UESC
,
14o47'S
,
39o16'W
on
8 December 2011
and
28 September 2012
, coll. A.R. Oliveira, and four microscopic slides with specimens collected from the campus of the CEPLAC,
14o45'S
,
39o13'W
on
19 December 2011
, coll. A.R. Oliveira.
Holotype
and 6 slides with about 400
paratypes
deposited in the collection of the
Acari
at
UESC
. Four slides with about 300
paratypes
deposited in the collection of Departamento de Entomologia e Acarologia, Universidade de São Paulo,
ESALQ
, Piracicaba, São Paulo,
Brazil
.
Host plant.
Theobroma grandiflorum
(Willd. Ex Spreng.) K. Schum. (
Sterculiaceae
).
Relation to host.
A vagrant species found mainly on immature fruit. It also occurs on buds, flowers, young leaves and branches with abundant trichomes. No mites were found on older fruits, leaves or branches.
Etymology.
The epithet
cupuassu
is derived from ‘cupuaçu’. This is the local common name of the fruit of the host plant,
T. grandiflorum
, which has been latinized.