Lilioceris gressitti Medvedev, 1958

Figs 1, 12, 18, 24, 30, 42, 43-44

Lilioceris gressitti Medvedev 1958: 111 (China, Prov. Yunnan, holotype, gender?).

Type material examined.

1 holotype (NHMB, photo), China, Prov. Yunnan, Vallis flumin Soling-ho / Lilioceris gressitti m, L. N. Medvedev det. 1957, holotype / Type.

Other material examined.

Total 24 specimens. China: Yunnan: 1♂, Kunming, 1941.V.23 / Lilioceris gressitti Medvedev, Peiyu Yu Det .; 1♂, Kunming, 1942.VI.27 ; 1♂ 1♀, Kunming, Zhujie Temple / 1958.IX.10 ; 1♂ 1♀, Yongsheng, Liude, 2400 m / 1984.VII.18, Shuyong Wang coll. ; 1♂, Tengchong, Dahaoping, Hao Huang, 2005.VI ; 1♂, Xishuangbanna, Mengzhe, 1750 m / 1958.VI.25, Fuji Pu coll. ; 1♂, Xishuangbanna, Menghai, 1200-1600 m / 1958.VII.22, Fuji Pu coll. ; 1♀, Kunming, Anning / 1980.VIII.6, 1900 m / Lilioceris gressitti Medvedev, Peiyu Yu Det .; 2♀, Xishuangbanna, Mengsong, 1600 m / 1958.VII.25, Leyi Zheng coll. ; 1♀, Xishuangbanna, Menghai, 1200-1600 m / 1958.VII.22, Shuyong Wang coll. ; 1♀, Lancang, 1100 m / 1957.VIII.8, Shuyong Wang coll. ; Kunming, suburb, 1900 m, 1956.II.16, Panfilov coll. ; 3♂ 5♀, Wuding, Chadian, Changji Road, 25.74144°N, 102.30336°E / 2296 m, 2020.VII.11 D1, Yuan Xu & Neng Zhang coll. ; 1♂ 2♀ (MHU), Puer, Laiyang River, 2007.VII.28, Guodong Ren, Wenjun Hou & Yachai Li coll. ; 1♂ (MHU), Lvchun, 2004.VII.27, Jing Li & Caixia Yuan coll. ; 1♂ (MCAU), Kunming, 1946.V ; 1♂ (MCAU), Kunming, Xi Shan, V. 16 ; 1♂ (MCAU), Kunming, 1947; Sichuan : 1♀, Xiangcheng, 2900-3200 m / 1982.VI.28, Shuyong Wang coll. ; Guizhou: 1♂ (MHU), Yinjiang, Fanjing Shan, 2010.VIII.19-21, Yiping Niu & Yong Zhou coll.

Diagnosis.

Femora bicolored, black with brownish red middle; pronotum disc with fine punctures; elytral punctures large on basal half, diminishing posteriorly; lateral side of metasternite with a narrow strip of pubescence; abdominal sternites with a row pubescence, interrupted in the middle, lateral transverse impressions present on sternites 2-5, with sparse pubescence outside the impressions.

Redescription.

BL = 6.0-7.0 mm, BW = 3.0-3.5 mm. The front part of the head, antennae, ventral surface black; occiput, pronotum, scutellum and elytra brownish red, femora bicolored, brownish red with apex black.

Head (Fig. 1). HL/HW = 1.2-1.5; vertex with a shallow groove in the middle, punctate and setose laterally; frontoclypeal area triangular, disc with fine punctures and sparse setae; labrum transverse, with sparse setae; antennomeres 5-10 slightly longer than wide (Fig. 30).

Pronotum (Figs 1, 12A). PW / HW = 1.1-1.3, PL / PW = 1.1-1.2; anterior angle slightly protruding; posterior angle not protruding; sides distinctly constricted in the middle; middle of disc with fine and scattered punctures; anterior and posterior transverse impression indistinct, basal transverse groove shallow.

Elytra (Figs 1, 12D). EL/EW = 1.2-1.4; sutural angle rounded; humeri protruding, humeral groove distinct, basal transverse impression indistinct; scutellary striole composed of 3-5 punctures; strial punctures large at base, diminishing posteriorly; intervals flat, at most convex at extremity of intervals 9 and 10; epipleura raised, with a row of fine punctures.

Mesosternite pubescent. Lateral side of metasternite with narrow strip of pubescence, extending from anterior margin to lateroposterior corner (Fig. 12B); metepisternum densely pubescent.

Abdominal sternites with a row of pubescence, interrupted in the middle; lateral transverse impressions present on sternites 2-5, area outside the impression densely pubescent (Fig. 12C).

Legs slender; tibiae with dense punctures and pubescence; femora with dense pubescence on dorsal surface, with sparse pubescence on ventral surface.

Male genitalia (Fig. 18A-D). Median foramen occupying 1/5 length of median lobe (Fig. 18A); apex rounded (Fig. 18B); basal piece of the tegmen triangular, lateral lobes strongly sclerotized; posterior part of dorsal sclerite in dorsal view more or less parallel-sided, slightly narrowed at apex (Fig. 18C, D).

Female reproductive organs (Fig. 24A-C). Spiculum gastrale short, X-shaped, distal part strongly widened, apical margin straight; ovipositor with dense setae, distal part of the ovipositor cylindrical, short, with a small protuberance; spermatheca greatly convoluted.

Distribution.

China (Yunnan, Sichuan, Guizhou).

Host plant and habitat.

(Figs 43, 44) One collecting locality of L. gressitti in Wuding county of Yunnan province is situated in subtropical area. This species fed on Dioscorea sp. ( Dioscoreaceae) according to observations of the first author (XY) in Yunnan (Fig. 44). The vegetation is subtropical evergreen forest. The climate is characterized by distinct rainy summer and dry winter, annual temperature generally ranges from 6 °C to 22 °C. The forests are composed of tall trees, woody vines, and epiphytes. The host plant Dioscorea sp. shares its habitat with other plants such as Pinus yunnanensis ( Pinaceae), Alnus sp. ( Betulaceae), Eucalyptus sp. ( Myrtaceae), Adiantum sp. ( Pteridaceae), Abelia sp. ( Caprifoliaceae), Ageratina sp. ( Asteraceae), Artemisia sp. ( Asteraceae), and Ficus sp. ( Moraceae). Lilioceris fouana are collected together with this species.

Remarks.

Medvedev (1958) indicated that L. gressitti was similar to L. rugata (Baly, 1865), especially to L. rugata sparsipunctata Medvedev, 1958 (synonymized with L. sinica by Gressitt and Kimoto 1961), but differed by the smaller and narrower body, finer punctures on the pronotum, and less strong punctures on the elytra. In addition, it differs from L. sinica in the abdominal sternites having less pubescence.