Drepanosticta sumatrana Sasamoto & Karube, 2007

Phan, Quoc Toan, Yokoi, Naoto, Makbun, Noppadon, Joshi, Shantanu, Subramanian, K. A., Ngo, Quoc Phu & Dow, Rory A., 2021, A review of the Drepanosticta carmichaeli-group, with the description of D. wildermuthi sp. nov. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platystictidae), Zootaxa 5067 (2), pp. 187-210 : 201-202

Drepanosticta sumatrana Sasamoto & Karube, 2007

Drepanosticta sumatrana: Sasamoto & Karube (2007) : Original description, holotype male only, Bandar Baru , North Sumatra, Indonesia, pp. 55–57, Figs 5–8 .

Notes. Sasamoto & Karube (2007) described D. sumatrana from a single male (collected in 1992) from North Sumatra, we are not aware of any subsequent record of this species. From the description and illustrations in Sasamoto & Karube (2007) the species must at least provisionally (awaiting the discovery of the female) be included in the D. carmichaeli -group since its posterior pronotal lobe and paraprocts meet the definition, as do the cerci although they are atypical in that they run almost straight along their dorsal surface viewed laterally and possess a slight apical dorsal expansion ( Fig. 7a in Sasamoto & Karube 2007). Judging from the description and illustrations there is no subbasal spur on the paraprocts in this species. The species is also somewhat atypical in that the arms of the terminal segment of the genital ligula not expanded apically but tapered, and the dorsal surfaces of the terminal abdominal segments are apparently without pale markings: Sasamoto & Karube (2017: 57) mentioned that there was only a large “baso-ventral yellow marking” on S8, a “small comma-shaped marking baso-laterally” on S9, and S10 is entirely black.

Distribution. Indonesia (Sumatra) ( Fig. 13 )

Figures

FIGURE 5. Drepanosticta emtrai ♂, Ta Thom, Laos (ZCDTU). (a), head and thorax in lateral view; (b), tip of abdomen; (c), genital ligula; (d), pterostigma.

FIGURE 6. Features of Drepanosticta jurzitzai, ♂ [a–d] & ♀ [e–h], Chantaburi, Thailand (ZCDTU). (a, d), head and thorax in lateral view; (b, f), head in frontal view; (c, g), prothorax in lateral view; (d, h), prothorax in dorsal view.

FIGURE 7. Features of Drepanosticta jurzitzai, ♂ [a–e] & ♀ [f–h], Chantaburi, Thailand (ZCDTU). (a, f), abdominal tip in lateral view; (b, c), appendages in dorsal & lateral view; (d), paraprocts in ventral view; (e), genital ligula; (g), abdominal tip in dorsal view; (h), pterostigma.

FIGURE 8. Features of male Drepanosticta vietnamica ♂, Ta Thom, Laos (ZCDTU). (a), head & thorax, lateral view; (b), prothorax, lateral view; (c), abdominal tip, lateral view; (d), appendages, oblique dorsal view; (e), genital ligula; (f), pterostigma.

FIGURE 13. Distribution map of Drepanosticta carmichaeli group. D. vietnamica (yellow circle); D. annandalei (red circle); D. brownelli (white circle); D. carmichaeli (red square); D. emtrai (blue square); D. hongkongensis (pink square); D. jurzitzai (red triangle); D. wildermuthi sp. nov. (yellow triangle); D. sumatrana (pink triangle); D. tenella (red diamond).