A new species of the genus Agetocera hope (Coleoptera: Chrysomelidae: Galerucinae) from China

2005·1.6 MB·

by  Li-Jie Zhang

PROC. ENTOMOL. SOC. WASH.
107(1), 2005. pp. 119-122
A NEW SPECIES OF THE GENUS AGETOCERA HOPE (COLEOPTERA:
CHRYSOMELIDAE: GALERUCINAE) FROM CHINA
Li-JiE Zhang and Xing-ke Yang
Institute of Zoology, Chinese Academy of Sciences, Beijing, 100080, P. R. China (e-
mail: [email protected])
—
Abstract. Agetocera biclava, n. sp., is described from Guangxi Autonomous Region,
P. R. China. The adult male, antennae and abdominal sternites of the male and female,
male aedeagus, and female spermatheca are illustrated.
Key Words: Coleoptera, Chrysomelidae, Galerucinae,Agetocera, taxonomy, new species
The genus Agetocera Hope (1840) was darkish blue. Length 10.5-12.0 mm; width
established as a monotypic genus contain- 4.8-5.0 mm.
ing A. mirabilis Hope from India. The ge- Male: Head exerted, narrower than pro-
nus currently includes 23 world species and thorax, with vertex convex, smooth and im-
is mainly distributed in the Oriental Region. punctate; postantennal tubercles strong;
Sixteen species are known from China, ten clypeus raised, with concavity in middle of
of which are endemic. frontal margin. Maxillary palpus large,
With the studies on Agetocera by Chen third segment longer than fourth, fourth mi-
(1942, 1964), Chujo (1962), Gressitt and nute and pointed at apex. Eyes strongly
Kimoto (1963), Kimoto (1989), Jiang convex; interspace between eyes nearly 2
(1992), and Yang et al. (1997, 2001), the times as wide as diameter of eye. Antenna
taxonomy of this genus is well known. Us- (Fig. 2) extending behind to middle of el-
ing the paper by Yang et al. (2001), we dis- ytra; first segment robust; second shortest;
covered another new species of Agetocera third 2 times as long as second and slightly
while identifying specimens from Guangxi longer than fourth; fourth to fifth equal in
Autonomous Region. This paper is a sup- length; sixth longer than fourth and sube-
plement to Yang et al. (2001). qual to seventh, each broadened at apices;
eighth to tenth longer than preceding seg-
Agetocera biclava Zhang and Yang, ments and subequal in length; eighth and
new species ninth very strongly swollen, eighth with an
oval concavity on dorsum near apex; elev-
(Fig. 1-8)
— enth 1.6 times as long as tenth. Pronotum
Description. Head, pronotum, and scu- 1.3 times as broad as long, narrow poste-
tellum reddish brown; antenna covered with riorly, broadened anteriorly; lateral margins
long hairs, yellowish brown to brown, last and basal margin bordered, front margin not
two segments dark brown; ventral surface bordered; disc sparsely punctuate and with
of thorax yellowish brown or lighter; ab- one transverse concavity on each side, with
domen and femora yellowish brown, apices punctures on each of four corners. Scutel-
of femora, tibiae, and tarsi black; elytron lum cuneiform and impunctate, concave at
120 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Figs. 1-8. Agetocera biclava. 1, Dorsal habitus, male. 2, Male antenna. 3, Female antenna. 4, Last visible
sternite of female. 5, Last visible sternite of male. 6, Lateral view of male aedeagus. 7, Dorsal view ofmale
aedeagus. 8, Spermatheca.
base. Elytron 3.6 times longer than broad; toward outer side, sparsely and finely punc-
disc convex, more broadly rounded apically tate. Meson of last visible sternite deeply
than basally; humerus raised; aridge behind concave; pygidium rounded apically (Fig.
humerus, parallel with lateral margin; disc 5). Aedeagus in Figs. 6—7; in dorsal view
covered with dense punctures, interspaces lateral margins sinuate, broadened in mid-
larger than diameter of a puncture; epipleu- dle, then narrowed basally and apically,
ron reaching apex of elytra, slightly bend broadened at apex and base; in lateral view
VOLUME NUMBER
107, 1 121
apex of aedeagus bent ventrally at nearly a and the apical projecting portion of the last
right angle. visible sternite of the female is broad. This
Female: Antennal segment three 2 times new species is also similar to A. taiwana
as long as second, third to seventh subequal Chujo, as in the following key:
in length, eighth to tenth subequal to each This new species may be placed in the
other in length, eleventh 1.5 times as long previous key to species (Yang et al. 2001)
as tenth (Fig. 3). Pronotum 1.5 times as as follows:
broad as long. Last visible sternite with
long apical projection in middle (Fig. 4). 14. Male with antennal segment 8 shorter than 5
Spermatheca (Fig. 8) with apex invaginated - Mtoal7ecowimtbhinaendtennal segment 8 longer than 5 \5
toward base ofcapsule, C-shaped, walls ob- to 7 combined 16
viously thicker than that of ductus and sur- 15. In male, third antennal segment 2 times lon-
face apparently smooth at lower magnifi- ger than second; eighth with an oval concav-
cation. — ity on dorsum near apex; ninth elongate, sub-
Types. Holotype S, P. R. China: Gu- equaltoeighth in length; tibiaeandtarsiblack
A. biclava. n. sp.
angxi Auto. Reg.: Tianlin, 1,600 m, 5-VI- - In male, third antennal segment 1.5 times lon-
2002, Coll. Jiang Guo-fang. Paratypes: 1 d, ger than second; eighth with a rectangular
1 9, same locality as holotype, 1,300- convexity apically; ninthdeplanate andbroad,
1,400 m, 28-VI-2002, Coll. Liu Jian-wen; almost triangular, shorter than eighth; tibiae
2 9, 1,600 m, 5-VI-2002, Coll. Jiang Guo- and tarsi yellowish brown, lasttwo tarsal seg-
ments brown A. taiwana Chujo
fang. All deposited in the Zoological Mu- 16. In male, ninth antennal segment U-shaped,
seum, Institute of Zoology, Chinese Acad- halfas long as tenth; female with last visible
emy of Scienc—es, Beijing, P. R. China. sternite concave mesally A. similes Chen
Etymology. The specie epithet is based - In male, ninthantennal segmentnotU-shaped
and more than half as long as tenth; female
on the enlarged eighth and ninth antennal
with last visible stemites convex mesally .... 17
segments of the male.
—
Remarks. All species of Agetocera Acknowledgments
have the eighth and ninth segments of the
We thank Wen-zhu Li and Si-qin Ge for
male antennae modified except Agetocera
drawing part of the figures. This research
filicornis Laboissiere. This is an important
was supported by the Chinese Academy of
and easy character to identify different spe-
Sciences Innovation Program.
cies. Also, the shape of last female sternite,
aedeagus, and spermatheca are very differ-
Literature Cited
ent among species. This new species can be
separated from other known species by the Chen, S. H. 1942. Galerucinae nou\eaux dc la Fauna
enlarged eighth and ninth segments of the Chinoise. Notes d'Entomologie Chinoisc l.\ (3):
male antennae, the long apical projection of 1-67.
the last sternite of the female, the apex of . 1964. New genera and species ofGalerucinae
from China. Acta Entomologica Sinica 13(2):
aedeagus bent ventrally in lateral view, and
201-211.
the C-shaped spermatheca. Chujo, M. 1962. A taxonomic study on the Chryso-
Agetocera biclava is similar toAgetocera melidae (Insecta: Coieoptera) from Formosa. Part
filicornis, but differs in the shape of the XI. Galerucinae. Philippine Journal oi Science
male antennae and the last visible sternite 91(1-2): 1-239.
of the female, the former with the eighth Gressitt, J. L. and S. Kinioto. 1963. The Chrysomeli-
and ninth segments of the male antenna dae (Coieoptera) o'i China and Korea. Pacific In-
sects Monograph IB: 30i-102(i.
swollen and the last visible sternite with a Hope. F W. 1S40. Tiic Colcoincrist Manual. Pari III.
long apical projection in the middle, with London. 1')I pp.
the projecting portion thin. In A. filicornis, -liang. S. Q. 1992. Coleplera: Chrysomelidae: Galeru-
the male antennae are normal, not swollen. cinae, pp. 646-674. In Chen, S. H., ed. Insects of
PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
122
Hengduanshan Mountains Region I. Science ince (Coleoptera: Chrysomelidae). Acta Zootax-
Press, Beijing. onomica Sinica 22(4): 384-391.
Kimoto, S. 1989. Chrysomelidae (Coleoptera)ofThai- Yang, X. K., S. Q. Ge, and W. Z. Li. 2001. Revision
land. Cambodia. Laos and Vietnam. IV. Galeru- ofthe Genus Agetocera Hope (Coleoptera: Chry-
cinae. Esakia No. 27. 241 pp. somelidae: Galerucinae). Oriental Insects 35:105-
Yang, X. K., W. Z. Li, and J. Yao. 1997. The Galer- 154.
ucinae beetles of Xishuangbanna. Yunnan Prov-