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ACAROLOGIA
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TWO NEW SPECIES OF THE GENUS ACERIA
(ACARINA : ERIOPHYOIDEA)
IN THE PEOPLE'S REPUBLIC OF CHINA
BY
ERIOPHYIDAE
FROI'vl
JIE-LIU XIN
AND
HUI-QUI DONG
*
Two new species of eriophyid mites, transmitting a serious plant viruse
didease on wheat and prosomillet when planted together, are described here.
SUMMARY :
CHINA
ERIOPHYIDAE
DE LA
CHINE
RÉSUM~ : Deux espèces nouvelles d'eriophyides, transmettant une grave maladie à
virus au blé et au millet des Oiseaux quand ils sont plantés ensembles, sont
décrites.
In the north-west districts of our country there
is a serious plant virus disease which occurs when
wheat and prosomillet are planted ~9gether. Formerly we always misunderstand that the virus of
this disease was transmitted by Aceria tulipae keifeir (Acarina : Eriophyidae), just the same as
wheat virus diseases in other countries. Recently
we have observed that there are two kinds of
symptom of this disease, one causing stems to
curve, and the other, leaves to roll. The studies
on its !ife history and its damage to the host
plants caused by virus will be reported elsewhere.
Throught this work two new species of
eriophyid mite, which transmit these diseases, are
described and discussed. The observations seem
to be the first record of eriophyid mites in the
People's Republic of China.
Aceria milli sp. n.
(Fig. 1)
•
m
body elongated, wormlike, whitish
average measurements in microus
FEMALE :
colour,
• Department of Biology, Fudan University , Shanghai, PRC.
Acarologia,
l.
XXIll, fasc. 2, 1982.
(n = 10) : body length 297 (247-313), (the following measurements use micron unit as before),
thickness 72 (61-79) narrowing posteriorly.
Rostrum length 27, gent! y curved down. Shield
subtriangular, length 41 (39-43), width 36 ;
median situated on the rear 1/3 ; admedian !ines
wavelike and bent three time ; lateral of proximal
part of admedian line there are three irregular
!ines ; submedian line located near base of dorsal
tubercle and inclined laterally ; area between submedian !ines filled with seven short !ines, arranging from front to back as 2, 2, 3.
Dorsal tubercles moderate in size located before
rear margin, 23 apart ; dorsal setae projecting
posteriorly, length 46 (43-61).
Leg moderately long. Forelegs exceed 43 long,
patella 10 (7-14) long, tibia 10 (7-10) long, patellar se ta 10 long, solenidion 14 (1 1-1 8) long,
feather-claw 7-rayed. Hindlegs 60 (43-89) long,
pate lia 10 long, tibia 8 long, patellar se ta 14
long, solenidion 16 long. Base of coxa without
distinct granulation ; seta of second coxa 22 long.
Abdominal rings from immediately behind
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shield to anal lobes number 88 (84-90) dorsally
12 long, patellar seta Il long, solenidion 17 (15and 84 (83-86) ventrally, with ring about 3.9 wide.
18) long, slightly bent, feather-claw 7-rayed.
Microtubercles of thanosome triangular, distally
Hindlegs 65 (43-84) long, patella 10 long ; base of
somewath pointed and slightly curved ; these are
coxa smooth.
weil shawn by scanning electron microscope.
Abdominal rings number 94 (84-95) dorsally
Severa! longitudinal fine striae on telosome venand 86 (81-92) ventrally. Microtubercles of thautrally. Su blaterai seta on about lOth ring above
sorne seem · un der scanning electron microscope
genital coverflap anterolaterally, and 42 long.
subtriangular, 3.6 wide.
First ventral seta on 25th ring, 57 long. Second
Sublateral seta on 12th ring and 25 long. First
ventral seta 33 long and on 44th ring. Third venventral seta 44 long, on 27th ring. Second ventral seta also 33 longand on 6th ring from rear.
tral seta 26 (24-32) long, on 44th ring. Third
Caudal seta about 78 long. Genital coverflap
ventral seta about 28 -~ long and situated on 6-7th
21 long, 25 wide, with genital setae 17.9 apart,
ring from rear.
and with 10-11 longitudinal ribs.
Caudal seta 70 long. Genital coverflap 24
long,
31-32 wide, and with Il · longitudial ribs.
• MALE : nuknown.
Genital
setae 24 long, 23-24 apart.
Specimens examined : Specimens were collected
on wheat and prosomillet, in Qing-yang, Gan-su,
in Nov. 1978.
Relation to host : The mite transmits a wheat
virus diseases and causes stems to curve.
Type material : The holotype specimen and
severa! paratypes mounted each on one slide,
deposited in Seminary of Agricultural Acarology,
Department of Biology, Fudan University, Shangai.
Aceria paratulipae sp. n.
(Fig. 2)
• MALE : unknown.
Specimens examined : Specimens were collected
on wheat and prosomillet in Pu-cheng in Shanxi
and Long-don in Gan-su, in January, 1979.
Relation to host : the mite transmits a wheat
virus disease and causes leaves to roll.
Type material : Holotype specimen and severa!
paratypes mounted each on one slide, deposited in
Seminary of Agricultural Acarology, Department
of Biology, Fudan University, Shanghai.
•
• FEMALE : body elongated, wormlike, whitish
in color, 300 (268-338) long, 76 (71-79) thick, narrowed posteriorly. Rostium 31 (29-36) long.
Shield subtrianglar, 45 (43-46) long, 46 wide,
median line situated on posterior half of shield
·Iength ; admedian lines abruptly bent medially
near apex of median line, and extending anteriorly, and not wavelike as in A. milli ; submedian lines weil removed from dorsal tubercles and
inclined laterally at leval of abrupt bend of admedian linea area between submedian lines filled
with 10 irregular short lines. Dorsal tubercle
moderate in size, situated ·before rear mar gin, 24
(21-25) apart ; dorsal setae projecting. posteriorly,
55 (48-61) long.
Forelegs exceed 46 long, patella 12 long, tibia
'
.
REMARKS:
So far as the writers are aware, three species of
eriophyid with causing serious damage on wheat
have hitherto been known from the world, that
is : A. tulipae (k.) in North America, A . Tenuis
(Na!.) in Eur,ope and . A. tritici Shevtchenko in
Soviet Union. The two new species in our
country are also serious pests, and resemble the
3 species mentioned above, but can be distinguished by the following characters :
1. The striation and length of shield, the number
of dorsal and ventral ring and length of genital
coverflap are different.
· 2. The rostrum resembles that of A. tulipae and
A. tenuis, but differs from that of A. tritici.
3. Length of dorsal setae shorter than in A. tulipae and tritici, but similar to A. tenuis.
-
FIG. 2.
Acena
. parat l'
162-
dorsal
e) legs
venter
; f)offemale
female ,. ~) feather-claw .
c) microtuberdes '. d)
u !pae
sp. shield
now ,. a)
gem tal coverflap. ,
163
4. Number of feather-claw rays is seven, but in
A. tenuis is 5 and in A. tritici is 7-8.
TABLE
5. The measurements of these five species are
given in tables 1 and 2.
Measurements of females of five Aceria species which attack wheat.
1.
Species
A. tu/ipae
(Keifcr)
M±m
Characters
A. te11uis
(Nat.)
M±m
A. tritici
Shevtchen~o
M±m
A. mi/li
sp . n.
M±m
A. paratulipae
sp. n.
M±m
number of dorsal rings
80
0.8
82
0.5
74
0.9
88
1.7
9~
1.1
number of ventral rings
76
1.0
76
0.5
66
0.9
84
0.5
86
0.9
length of shield
37.5 0.3
35
0.8
32
0.6
41
0.2
45
0.5
length of rostrum
27
0.16
26
0.6
23
0.5
27
1.2
33
1.2
length of dorsal seta
64
0.9
47
1.7
66
0.9
46
0.7
55
0.2
space between dorsal setae
27
0.6
22
0.8
24
0.6
25
1.7
24
0.2
spaœ between genital setae
2.0
0.33
14.5
1.5
16.7
0.4
27
1.1
23
0.3
width of coverllap
24
0.5
19
0.9
18.7
0.5
25
0.6
31
2
length of coverllap
15
0.3
95
1.6
1.0
0.3
21
0.9
24
0.2
number of feather-claw rays
7-8
7
TABLE
2.
7
Differences bctween the two new species.
A. mi/li
A . paratu/ipae
t-test
M± rn
M±m
M±m
number of dorsal rings
88
1.7
94
1.1
5.5
number of ventral rings
84
0.5
86
0.9
1.7
length of shield
41
0.2
45
0.5
8.0
length of rostrum
27
1.2
33
1.2
0.6
Species
Characters
length of dorsal seta
46
0.7
55
0.2
8.1
space between dorsal setae
25
1.7
24
0.2
0
space between genital setae
22
1.1
23
0.3
1.4
width of coverllap
25
0.6
31
2
7.5
length of coverllap
21
0.9
24
0.2
1.6
number of feather-claw rays
7
REFERENCES CITED
KEIFER (H. H.), 1938. - Eriophyid studies . Calif. Dept. Ag rie., 27 : 18 1-206.
-, 1952. - Ibid., 42 (2) : 65-79.
Bull.
7
SHEVTCHENKO (V. G.), DE-MILLOT (A. P.), RAZVYAZKINA (G. M.), and KEPKOVA (E. A.), 1970. - Taxonomie bordering of closely related mites Aceria tulipae Keif. and A. tritic sp. n. (Acarina, Eriophyidae) - vectors of the onion and wheat viruses. Zoologischesky Zhurnal, 49, 224-235 (in Russian with
English summary).
Paru en juillet 1982.