Metahelotella immaculata ( Ritsema, 1891 )

Huang, Yu-Zhou & Gu, Tian-Xuan, 2025, Taxonomic notes on the little-known genus Metahelotella Kirejtshuk (Coleoptera, Cucujoidea, Helotidae) from southwestern China, with description of a new species and two new records, ZooKeys 1258, pp. 189-198 : 189-198

Metahelotella immaculata ( Ritsema, 1891)

Fig. 3 D, E

Helota immaculata Ritsema, 1891: 895 ( type locality: Myanmar); Wegrzynowicz 2000: 399.

Metahelotella immaculata : Kirejtshuk 2000: 30; Lee 2009 b: 790.

Material examined.

China • 1 ♂; Yunnan, Dehong Prefecture, Yingjiang County, Mangyun Village ; 2025. V; Gui-Chang Liu leg.; CYZH . • 2 ♀♀; Yunnan, Dehong Prefecture, Yingjiang County, Nongzhang Town , 890 m; 2025. VII. 19; Gui-Chang Liu leg.; CYZH . India • 1 ♂, 1 ♀; Pedong; 1934; collector unknown; CYZH .

Diagnosis.

Body (Fig. 3 D, E ) slender and elongate, sides nearly parallel. Head brownish green; pronotum yellowish brown; elytra brownish bronze with greenish sheen; tibiae and apices of femora greenish bronze. Protibia curved in male. Pronotum broad, subrectangular, lateral margins straight, with weak crenulations near anterior angles; elytra oblong, widest at middle.

Distribution.

China (new country record): Yunnan (Fig. 5 ); India; Myanmar; Thailand.

Remarks.

The specimens from Yunnan appear morphologically consistent with those from India.

Figures

Figure 3. Habitus of Metahelotella spp. A. M. semifulva from Guangxi, ♀, dorsal view; B. Ditto, ventral view; C. M. semifulva from Yunnan, ♂, dorsal view; D. M. immaculata from Yunnan, ♂, dorsal view; E. Ditto, ventral view. Scale bars: 2 mm.

Figure 5. Distribution map of Metahelotella spp. in Indochina and southwestern China.