The genus Argopistes Motschulsky from Japan and Taiwan, with descriptions of three new species from Taiwan (Coleoptera, Chrysomelidae, Galerucinae, Alticini)AuthorLee, Chi-Feng0000-0003-1996-0557Applied Zoology Division, Taiwan Agricultural Research Institute, Taichung 413, TaiwanAuthorChiang, Ming-Yao0000-0002-1514-7086Applied Zoology Division, Taiwan Agricultural Research Institute, Taichung 413, TaiwanAuthorSuenaga, HarukiNakashima, 108 - 11, Kurashiki-shi, Okayama, 710 - 0803 JapantextZooKeys20242024-10-151215151183journal article10.3897/zookeys.1215.134871C57CB315-F15F-4D98-868A-EFEA22BC64A3Argopistes tsekooni
Chen, 1934
Figs 8 A – C
,
9Argopistes tsekooni
Chen, 1934 b: 316 (
China
:
Shanghai
, Hangchow);
Csiki 1940: 525
(catalogue);
Chûjô and Kimoto 1961: 174
(
China
,
Japan
);
Gressitt and Kimoto 1963: 813
(
China
:
Jiangsu
);
Kimoto 1965: 437
(redescription);
Lee and An 2001: 183
(
South Korea
);
Lee and Cho 2006: 91
(host plant); Takizwa, 2012: 38 (faunistics);
Cho and An 2020: 15
(
North Korea
);
Won et al. 2023: 9
(
South Korea
: Ulleungdo).
Argopistes biplagiatus
:
Baly 1874: 202
(misidentification).
Type material examined.
One
syntype
• (sex undetermined,
IZAS
): “ 浙江 (=
Zhejiang
): 杭州 (= Hangchow) / 1934. [h] / 中国科學院 (= Chinese Academy of Sciences) [h, p] // 害水蜡樹 (attacking
Ligustrum obtusifolium
) [h, w] //
Argopistes
/
tsekooni
/ Chen [h, w] ”. Although this specimen does not bear any type label, it should be regarded as type specimen since it fit the original description.
Additional material examined.Japan
.
•
1 ♀
(
NHMUK
): “
Argopistes
/
biplagiatus
/ Motsch / Japan [h, w] // Baly Coll. [p, w] ”;
Honshu.Shizuoka
: •
1 ♂
(
SEHU
),
Tagata-gun
,
Tohi
,
4. V. 1985
, leg.
Y. Komiya
;
Tokyo
: •
1 ♂
(
HAPC
),
Komae-shi
,
Komai-machi
,
10. VI. 2021
, leg.
R. Seki
;
Yamaguchi
: •
1 ♂
(
NHMUK
);
Kyushu.Fukuoka
: •
1 ♀
(
HAPC
),
Fukuoka-shi
,
Higashi-ku
,
Shimobaru
(alt.
100–360 m
),
27. V. 2009
, leg.
S. Sejima
; •
1 ♀
(
NHMUK
),
Mt. Mikazuki
,
2. V. 1954
, leg.
K. Morimoto
;
Nagasaki
: •
1 ♂
,
2 ♀
(
SEHU
),
Sasebo-shi
,
Mt. Yahirodake
,
14. IV. 1981
, leg.
J. Okuma
; •
1 ♂
(
SEHU
), same locality but with “
21. IV. 1981
”;
Oita
: •
2 ♂
,
3 ♀
(
HAPC
),
Hita-shi
,
Miwa
,
Chikura
,
11. IV. 2016
, leg.
S. Sasaki.Diagnosis.
Adults of
A. tsekooni
are recognized easily by their small body sizes (<
3.5 mm
;>
3.5 mm
in others except
A. unicolor
), elongate ovate body shapes (elytra 1.2 × longer than wide; but 1.1 × longer than wide in others), and the combined red spots on elytra (usually separate red spots on the elytra in others); additionally, most genitalic characters are unique, such as the tube-like apex of the aedeagus (Fig.
9 C
); few setae on apical margin of abdominal ventrite VIII in females (Fig.
9 E
); and transverse gonocoxae with dense, long setae on the widely rounded apical margin (Fig.
9 G
).
Redescription.
Length
2.8–3.2 mm
, width
2.1–2.4 mm
. Color (Fig.
8 A – C
) blackish brown, elytron with one transverse orange area at basal 1 / 3, and narrowed towards suture; tarsi and front tibiae yellow; antennae dark brown but seven basal antennomeres yellow. Pronotum broad, convex, lateral margin narrowly explanate; 2.0–2.1 × wider than long, disc with dense coarse punctures; lateral margin rounded, anterior margin strongly concave, posterior margin moderately convex. Elytra elongate oval, 1.2 × longer than wide, disc with confused, dense, coarse punctures.
Habitus of
Argopistes
species
AA. tsekooni
Chen
, male, dorsal view
B
ditto, ventral view
C
ditto, lateral view
DA. unicolor
Jacoby
, female, dorsal view
E
ditto, ventral view
F
ditto, lateral view.
Argopistes tsekooni
Chen
A
antenna, male
B
antenna, female
C
aedeagus, dorsal view
D
aedeagus, lateral view
E
abdominal ventrite VIII, female
F
spermatheca
G
gonocoxae.
Male.
Antenna filiform (Fig.
9 A
), antennomere I much longer than others, approximate ratios of length of antennomeres I – XI 1.0: 0.4: 0.3: 0.5: 0.5: 0.5: 0.5: 0.5: 0.5: 0.5: 0.7; approximate ratios of length to width of antennomeres I – XI 3.1: 1.8: 2.0: 2.5: 2.3: 1.9: 1.8: 2.1: 2.1: 2.2: 2.9. Aedeagus (Fig.
9 C, D
) gradually widened from basal 1 / 9–1 / 2, then gradually narrowed to basal 1 / 2, strongly widened posterior – basal 1 / 2; anterior opening large, ~ 0.39 as long as aedeagus, from apex to apical 2 / 5; tectum composed of one pair of sclerotized processes, long, ~ 0.85 as long as anterior opening, wide and slightly curved from basal 2 / 4 to apex in lateral view, recurved near apex; endophallic sclerite laterally flattened, with base twisted.
Female.
Antenna (Fig.
9 B
) similar to males, but antennomeres VII – X wider, ratios of length of antennomeres I – XI 1.0: 0.4: 0.3: 0.4: 0.4: 0.4: 0.4: 0.4: 0.4: 0.4: 0.6; ratios of length to width of antennomeres I – XI 3.8: 1.8: 2.0: 1.8: 1.9: 1.9: 1.6: 1.5: 1.5: 1.5: 2.4. Ventrite VIII (Fig.
9 E
) weakly sclerotized, only part of apical margin well sclerotized, with several setae along apical margin, spiculum long and base wider. Spermathecal receptaculum (Fig.
9 F
) longer than pump, moderately swollen, curved in lateral view; pump emarginated at inner side of base; spermathecal duct with long basal part, ramus truncate. Gonocoxae (Fig.
9 G
) wide and separated, base membranous, each gonocoxa asymmetric, apically narrowed from near base, with sparse setae along apical areas, setae longer at apical 1 / 2.
Color variation.One male
has a black body and lacks transparent spots on elytra. Another male has an entire yellowish-brown body.
Host plants.Oleaceae
:
Ligustrum obtusifolium
(
Chûjô & Kimoto, 1961
)
;
Syringa oblata
Lindl.
,
L. japonicum
,
L. licidum
, and
L. sinense
(
Zhang et al. 2008 b
)
.
Biology.
The biology and life history of
A. tsekooni
were studied under laboratory and outdoor conditions in Huangshan City of
Anhui Province
,
China
(
Zhang et al. 2009
).
Argopistes tsekooni
overwintered as adults and had three overlapping generations in
Anhui Province
.
Distribution.China
,
Japan
(Honshu, Kyushu, the Goto Isls., Hirado-jima Is. Tsushima Is.),
North Korea
,
South Korea
.