Plant mites of the Dominican Republic, with a description of a new species of Petrobia (Tetranychina) Wainstein, 1960 (Acari, Prostigmata, Tetranychidae) and a key to the species of this subgenus
Author
Martínez, Leocadia Sánchez
Author
Flechtmann, Carlos H. W.
Author
De Moraes, Gilberto J.
text
Zootaxa
2014
3846
4
547
560
journal article
45045
10.11646/zootaxa.3846.4.3
60a0cc08-2ae7-428f-a300-d39b9a13f50e
1175-5326
226073
12F1BF5E-F6C0-44CB-8712-7ED7677A4DC9
Petrobia
(
Tetranychina
)
hispaniola
n. sp.
Sánchez & Flechtmann (Figs 1–8)
DIAGNOSIS
. A
Petrobia
(
Tetranychina
)
with long body setae; legs I twice as long as idiosomal length (not including gnathosoma); peritreme ending in anastomosing chambers forming a globular structure; tibia of leg I in males with seta
b
trichobothrium-like and with 41 solenidia.
FEMALE
(
holotype
+ 8
paratypes
). Idiosoma (Fig. 1A) broadly oval 638 (638–820); 545 (358–600) wide. All dorsal setae robust, finely pilose and set on strong tubercles (Fig. 1B). Dorsopropodosomal setae:
v2
100 (85–110), 85 (78–85) apart;
sc1
145 (120–153), 125 (118–130) apart;
sc2
88 (73–88). Hysterosomal setae:
c1
190 (188–200), 163 (175–188) apart;
c2
183 (163–188);
c3
88 (65–83);
d1
208 (190–213), 83 (50–75) apart;
d2
193 (165–190);
e1
195 (173–200), 58 (50–88) apart;
e2
185 (163–188);
f1
195 (175–203), 30 (25–50) apart;
f2
153 (125–163);
h1
115 (85–113), 90 (75–112) apart. Integumental striae irregularly transverse, tending to longitudinal between bases of setae
e1
; striae granulated (Fig. 1C). Prodorsum punctated centrally and outlined by striae. Gnathosoma: stylophore rounded anteriorly (Fig. 1D). Peritreme ending in anastomosing chambers forming a globular structure (Fig. 1E). Palp robust (
Fig. 4
A); trochanter and femur indistinctly separated; genu with one posterolateral seta, tibia with a dorsal “claw” and three setae; tarsus with seven setiform structures.
Venter
: integument transversally striated to setae
3a
(intercoxal 3); posterior striae irregularly longitudinal with a small transversely striate rhomboid area posterior to setae
4a
(intercoxal 4) (
Fig. 4
B). Pseudanal setae:
h2
11 (9–14),
h3
10 (11–13).
Legs
: legs I approximately twice as long as idiosoma not including gnathosoma. Legs
I 1327
(
1042–1340
), II 570 (518–595), III 645 (577–677),
IV 1017
(767–1055).
Leg chaetotaxy, from coxae to tarsi (solenidia shown in parentheses, eupathidia shown in square brackets):
I: 2 –
1 – 9 – 4 – 15
(+11) – 16(+7)[+3] + 2 duplexes (
Figs 2
B, C)
II: 2 –
1 – 7 – 5 – 11
– 11(+1)[+3] + 2 duplexes (
Figs 2
D, E)
III: 1 –
1 – 5 – 5 – 10
– 14(+1) (
Figs 3
A, B)
IV: 1 –
1 – 5 – 5 – 10
– 14 (+1) (
Figs 3
C, D)
Variation in leg I chaetotaxy: tibia I: three specimens with 15(9); one specimen with 15(13) and one specimen with 14(12); tarsus I: four specimens with 18(8) + 2 duplexes.
Empodia I–IV clawlike, distally recurved, with two rows of 12 tenent hairs directed ventrally; claws (true claws) padlike, about one third length of uncinate empodium, with tenet hairs (
Fig. 2
A).
MALE
(n = 1
paratype
) Much smaller than female, 325 long not including gnathosoma, 365 long including gnathosoma, 175 wide (
Fig. 5
).
Most dorsal idiosomal setae much shorter and broader than those of female (
Fig. 5
):
v
2
31, 35
apart;
sc1
61, 77 apart;
sc2
40;
c1
38, 58 apart;
c2
37;
c3
27;
d
1
25, 36
apart;
d2
33;
e
1
20
, 28 apart;
e2
20
;
f
1
22, 10
apart;
f2
25;
h
1
39, 30
apart. Palp robust (
Fig. 8
A); trochanter and femur indistinctly separated; genu and tibia also indistinctly separated, with four setae; tarsus with seven setiform structures.
FIGURE 1.
Petrobia
(
Tetranychina
)
hispaniola
Sánchez & Flechtmann n. sp., female. A. Dorsal idiosoma dorsal; B. Seta
sc1
; C. Detail of integument; D. Dorsal outline of stylophore; E. Peritreme.
FIGURE 2.
Petrobia
(
Tetranychina
)
hispaniola
Sánchez & Flechtmann n. sp., female, legs. A. Empodium; B. Tarsus I; C. Tibia I; D. Tarsus II; E. Tibia II. Tactile setae unmarked; solenidia, eupathidia and duplex setae indicated by ω, ξ and Δ.
Legs
: relative lengths similar to female. Leg
I 1235
, II 532, III 585, IV 863. Leg chaetotaxy, from coxae to tarsi, solenidia in parentheses:
I: 2 – 1 – 9 – 4 – 3(+41) + 5 duplexes +
b
(a trichobothrium-like seta) – 10(+15)[+2] + 5 duplexes (
Figs 6
A, B, C)
II: 2 –
1 – 8 – 5 – 11
– 13(+2)[+2] + 1 duplex (
Figs 6
D, E)
III: 1 –
1 – 5 – 5 – 10
(+1) – 14(+1) (
Figs 7
A, B)
IV: 1 –
1 – 5 – 5 – 11
– 14(+1) (
Figs 7
C, D)
On tibia of leg I seta
d
has the typical aspect of a trichobothrium. Tarsus I with four duplex setae.
Venter
: setae
h2
13,
h3
14 (
Fig. 8
B).
Aedeagus similar to those of other species for which the male is known: lanceolate, narrowing gradually and apically rounded; with two lateral acicular appendices.
ETYMOLOGY:
The name
hispaniola
refers to the island shared by
Haiti
and
Dominican Republic
.
FIGURE 3.
Petrobia
(
Tetranychina
)
hispaniola
Sánchez & Flechtmann n. sp., female, legs. A. Tarsus III; B. Tibia III; C. Tarsus IV; D. Tibia IV. Tactile setae unmarked; solenidia indicated by ω.
FIGURE 4.
Petrobia
(
Tetranychina
)
hispaniola
Sánchez & Flechtmann n. sp., female. A. Palpus; B. Genito-anal region.
TYPE
MATERIAL
: Female
holotype
and five female
paratypes
from orange (
Citrus sinensis
Osbeck
;
Rutaceae
) leaves, and three female and one male
paratypes
from rose (
Rosa
sp.;
Rosaceae
) leaves, all from Río Seco, La Vega,
Dominican Republic
(Caribbean), collected by a group of undergraduate students in
Nov. 2010
; all deposited at Departamento de Entomologia e Acarologia (ESALQ-USP), Piracicaba-SP,
Brasil
.
REMARKS:
Petrobia
(
T.
)
hispaniola
n.sp.
resembles
P
. (
T
.)
harti
Ewing, 1909
sensu
Pritchard &
Baker
(1955)
and
Baker
& Tuttle (1994)
, in the aspect of the dorsal body setae and length of female leg I, but it is distinguished by the different peritreme (straight, ending in a simple chamber in
P.
(
T
.)
harti
). It also resembles
P.
(
T.
)
kleptes
Kamran & Afzal, 2004
by having dorsal setae long and inserted on tubercles; however, it is distinguished by the different peritreme (distally hooked and ending in a simple chamber in
P.
(
T.
)
kleptes
).
In this new species, tibial seta
d
has a trichobothridial aspect, which is found only in some
Bryobiinae
; in those cases, that seta is denoted by
db
(
Grandjean, 1943
;
Lindquist, 1985
). In the new species here described, that
type
of seta is only found in the male. This is the first species of
Petrobia
(
Tetranychina
)
reported from roses and the third from
Citrus
[together with
P
. (
T
.)
harti
and
P
. (
T
.)
kleptes
]. Although
Lindquist (1985)
had mentioned the number of solenidia on tibia I of male to be up to 30, in the species here described the number is much higher (41).