Drepanosticta emtrai Dow, Kompier & Phan, 2018

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 : 198-199

Drepanosticta emtrai Dow, Kompier & Phan, 2018

( Figure 5a–d)

Drepanosticta emtrai: Dow et al. (2018) : Original description, Figs 1 –16, 21, holotype from Huong Son of Ha Tinh Province, Vietnam, paratypes from Nghe An and Hanoi Provinces , Vietnam and Bolikhamsai, Laos .

Drepanosticta sp.1 : Yokoi & Souphanthong (2014): Plate 2, p. 25 (habitus photo male); Fig. 9, p. 53 (appendages in lateral view).

Specimens examined. 2 ♂♂, Khe Kem (18.9729 N, 104.8168 E, altitude 273 m), Pu Mat National Park , Nghe An Province, Vietnam, 14.v.2019, Q. T . Phan leg. (ZCDTU); 1 ♀, Khe O (18.9118 N, 104.9242 E, altitude 66 m), Pu Mat National Park , Nghe An Province, Vietnam 12.v.2019, Q. T . Phan leg. (ZCDTU); 2♂, Son Kim 2 Commune (18.4387 N, 105.2146 E, altitude 127 m), Huong Son District , Ha Tinh Province, Vietnam, 09.v.2015, Q. T . Phan leg. (ZCDTU); 3 ♀♀, same location, 05.vii.2018, Q. T . Phan leg. (ZCDTU); 4 ♂♂, Ta Thom Village (19.0329 N, 103.5950 E, altitude 355 m), Muangngan District, Xieng Khuoang Province, Laos, 27.v.2017, Naoto Yokoi leg. ( ZCDTU) .

Notes. The Laotian D. emtrai differs from the type series (from Dow et al. 2018) by the pale yellow lateral stripe on the male synthorax ( Fig. 5a) and the apices of the arms of the genital ligula more expanded ( Fig. 5c) compared to a bluish lateral stripe and less expanded in the D. emtrai description. Although not noted in Dow et al. (2018) at least one of the paratypes of D. emtrai has more expanded apices of the arms of the genital ligula. It is noted in Dow et al. (2018) that some of the paratypes have the metepisternum completely dark. Although there is clearly considerable variation in the presence, color and extent of the marking on the metepisternum in this species, as well as the extent of pale color on S8, the abdominal pattern and structure of appendages of specimens from Laos ( Fig. 5b) agree well with D. emtrai .

Distribution. Vietnam (Hanoi City, Nghe An & Ha Tinh Provinces); Laos (Bolikhamsai & Xieng Khuoang Provinces) ( Fig. 13).