A review of the Drepanosticta carmichaeli-group, with the description of D. wildermuthi sp. nov. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platystictidae) Author Phan, Quoc Toan 0000-0002-3154-6546 The Center for Entomology & Parasitology Research, College of Medicine and Pharmacy, Duy Tan University, 3 Quang Trung, Da Nang, Vietnam. & pqtoan 84 @ gmail. com; https: // orcid. org / 0000 - 0002 - 3154 - 6546 pqtoan84@gmail.com Author Yokoi, Naoto 0000-0002-6829-3220 2 - 37 - 11, Kaisei, Koriyama, Fukushima, 963 - 8851, Japan. yokoi @ orange. plala. or. jp; https: // orcid. org / 0000 - 0002 - 6829 - 3220 211 / 5 Moo 4, Takhli, Nakhon Sawan, 60140, Thailand. yokoi@orange.plala.or.jp Author Makbun, Noppadon Author Joshi, Shantanu 0000-0002-4552-5746 Biodiversity Lab, National Centre for Biological Sciences, Bengaluru 560065, Karnataka, India. shantanu @ ifoundbutterflies. org; http: // orcid. org / 0000 - 0002 - 4552 - 5746 & Zoological Survey of India, Southern Regional Centre, 130, Santhome High Road, Chennai- 600 0028. shantanu@ifoundbutterflies.org Author Subramanian, K. A. Zoological Survey of India, Southern Regional Centre, 130, Santhome High Road, Chennai- 600 0028. Author Ngo, Quoc Phu 0000-0002-2533-2111 The Center for Entomology & Parasitology Research, College of Medicine and Pharmacy, Duy Tan University, 3 Quang Trung, Da Nang, Vietnam. & ngoquocphu @ gmail. com; https: // orcid. org / 0000 - 0002 - 2533 - 2111 ngoquocphu@gmail.com Author Dow, Rory A. Institute of Biodiversity and Environmental Conservation, University Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia. & Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, The Netherlands. text Zootaxa 2021 2021-11-10 5067 2 187 210 journal article 3605 10.11646/zootaxa.5067.2.2 488821ce-fa5c-478e-8804-6de7c27530c4 1175-5326 5677825 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). FIGURE 5. Drepanosticta emtrai ♂, Ta Thom , Laos (ZCDTU). (a), head and thorax in lateral view; (b), tip of abdomen; (c), genital ligula; (d), pterostigma. 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 ).