Six new species of Rhyncaphytoptinae from northwestern China (Acari: Eriophyoidea: Diptilomiopidae)
Author
Xue, Xiao-Feng
Author
Song, Zi-Wei
Author
Hong, Xiao-Yue
text
Zootaxa
2006
1225
1
19
journal article
50714
10.5281/zenodo.172663
587b8197-11da-45f2-978e-b9cbdba93261
11755326
172663
Rhyncaphytoptus abiesis
sp. nov.
(
Fig. 4
)
Description
FEMALE (n = 9). Body fusiform, 282 (270–290) long, 103 (98–106) wide, 108 (103–112) thick; light yellow in color. Gnathosoma 72 (70–75), projecting downwards.
Prodorsal shield
60 (58–62) long, 80 (78–82) wide, semicircular, entire surface with many dashes. Dorsal tubercles ahead of rear margin, 55 (53–56) apart, scapular setae (
sc
) 210 (196–220), very long, projecting forwards.
Coxal area
with granules; anterolateral setae on coxisternum I (
1b
) 13 (12–15), proximal setae on coxisternum I (
1a
) 32 (30–35), proximal setae on coxisternum II (
2a
) 52 (50–55). Sternal line present.
Legs
with usual series of setae. Leg
I 50
(48–51) long, femur 16 (15–17), basiventral femoral setae (
bv
) 20 (18–22); genu 6 (6–7) long, antaxial genual setae (
l’’
) 42 (37–43) long; tibia 20 (19–20), with 3 to 4 rows of spines; paraxial tibial setae (
l’
) 12 (11–12), setae located 2/3 from dorsal base; tarsus 6 (5–6) long, tarsal empodium simple, 7rayed, tarsal solenidion knobbed. Leg
II 43
(41–45) long, femur 12 (11–13), basiventral femoral setae (
bv
) 18 (18–19); genu 5 (5–6) long, antaxial genual setae (
l’’
) 13 (12–13) long; tibia 16 (15–17) with 3 to 4 rows of spines; tarsus 6 (5–6) long; tarsal empodium simple, 7rayed, tarsal solenidion knobbed.
Opisthosoma:
dorsal opisthosoma with 32 (30–33) annuli, with filament microtubercles on rear annular margins, ventrally with 69 (65–72) microtuberculate annuli. Setae
c2
82 (80–85) on ventral annulus 7 (7–8); setae
d
35 (32–37) on ventral annulus 36(34–37); setae
e
27 (26–28) on ventral annulus 48 (46–50); setae
f
31 (30–33) on 6th ventral annulus from rear. Setae
h1
6 (6–7) long.
Female genitalia
27 (25–28) long, 31 (30–33) wide, coverflap smooth, proximal setae on coxisternum III (
3a
) 35 (32–36) long.
MALE. Not seen.
Types
Holotype
, female,
China
: Shaanxi Province, Yang County, Huayang,
33°25.23’N
,
107°32.26’E
.
August 10, 2004
, from
Abies fabri
(Mast.) Craib (Pinaceae)
, coll. Xue, Xiao Feng & Song, ZiWei.
Paratypes
,
8 females
, with the same data as
holotype
.
Relation to host
Vagrant on leaf surface. No damage to the host was observed.
Etymology
Derived from the generic name of the
type
host plant,
Abies
.
Remarks
This species is similar to
Rhyncaphytoptus atlanticus
Keifer, 1959
, on
Ulmus americana
L. (
Ulmaceae
), but can be differentiated by coxal area with granules (smooth in
R. atlanticus
), prodorsal shield with many dashes, scapular setae (
sc
) much longer (9 long in
R. atlanticus
) and empodium 7rayed, solenidion knobbed (empodium 8rayed and solenidion tapered in
R. atlanticus
).
FIGURE 4.
Rhyncaphytoptus abiesis
sp. nov.
A, dorsal view of female; B, coxae and female genitalia; C, legs I and II; D, lateral microtubercles; E, empodium.
Rhyncaphytoptus fabris
sp. nov.
(
Fig. 5
)
Description
FEMALE (n = 10). Body fusiform, 340 (280–360) long, 110 (97–115) wide, 98 (95–100) thick; light yellow in color. Gnathosoma 50 (45–52), projecting downwards.
Prodorsal shield
71 (64–75) long, 96 (82–103) wide, sub quadrangular; median line present 1/3 at base, admedian lines concaved at center, median and admedian lines connected at basal 1/3 and base and forming a network, with short dashes covering entire shield. Dorsal tubercles on rear margin, 56 (52–60) apart, scapular setae (
sc
) 75 (65–78) projecting forwards, more robust than usual.
Coxal area
I with short lines, coxal area II smooth; anterolateral setae on coxisternum I (
1b
) 10 (10–11), proximal setae on coxisternum I (
1a
) 38 (35–41), proximal setae on coxisternum II (
2a
) 70 (65–73). Sternal line absent.
Legs
with usual series of setae. Leg
I 64
(62–67) long, femur 26 (25–27), basiventral femoral setae (
bv
) 20 (18–21); genu 7 (6–7) long, antaxial genual setae (
l’’
) 30 (28–33) long; tibia 18 (17–19), paraxial tibial setae (
l’
) 10 (9–10), setae located at 2/3 from dorsal base; tarsus 9 (9–10) long; tarsal empodium simple, 7rayed, tarsal solenidion tapered. Leg
II 60
(58–63) long, femur 23 (22–23), basiventral femoral setae (
bv
) 17 (16–18); genu 6 (5–6) long, antaxial genual setae (
l’’
) 9 (8–10) long; tibia 18 (17–18); tarsus 9 (8–9) long; tarsal empodium simple, 7rayed, tarsal solenidion tapered.
Opisthosoma
: dorsal opisthosoma with 51 (49–53) annuli, smooth, with five longitudinal ridges, middorsal ridge ends in a furrow before subdorsal ridges end, submedial ridges extend from posterior shield margin and fade on dorsal annulus 9, ventrally with 98 (93–102) annuli, with spiny microtubercles. Setae
c2
60 (55–63) on ventral annulus 13 (12–14); setae
d
105 (101–109) on ventral annulus 35 (32–35); setae
e
71 (65–73) on ventral annulus 55 (52–57); setae
f
48 (45–52) on 8th ventral annulus from rear. Setae
h1
7 (6–8).
Female genitalia
22 (21–23) long, 30 (26–34) wide, coverflap smooth, proximal setae on coxisternum III (
3a
) 55 (51–58) long.
MALE (n = 3). 241 (220–250) long, 94 (93–95) wide, male genitalia 5 (4–5) long, 30 (29–31) wide, proximal setae on coxisternum III (
3a
) 30 (25–35) long.
Types
Holotype
, female,
China
: Gansu Province, Dangchang County, Daheba,
33°52.52’N
,
104°22.15’E
.
September 13, 2005
, from
Abies fabri
(Mast.) Craib (Pinaceae)
, coll. Xue, XiaoFeng & Song, ZiWei.
Paratypes
,
9 females
and
3 males
, with the same data as
holotype
.
Relation to host
Vagrant on leaf surface. No damage to the host was observed.
FIGURE 5.
Rhyncaphytoptus fabris
sp. nov.
A, dorsal view of female; B, coxae and female genitalia; C, legs I and II; D, lateral microtubercles; E, empodium; F, male genitalia.
Etymology
Derived from the specific epithet of the
type
host plant,
fabri
.
Remarks
This species is similar to
Rhyncaphytoptus taihangensis
Xue & Hong, 2005
, on
Morus alba
L. (
Moraceae
), but can be differentiated by the prodorsal shield having many uniform dashes which cover the entire shield (dashes absent on prodorsal shield in
R. taihangensis
), empodium 7rayed (5rayed in
R. taihangensis
), dorsal annuli smooth (with spiny microtubercles in
R. taihangensis
) and setae
h1
present (absent in
R. taihangensis
). Although this species was also found on
A. fabri
, we do not consider it a deutogyne or protogyne of the other species because it is highly unlikely, perhaps impossible, to find these stages together on this host in
China
, especially in summer.