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 tenella Lieftinck, 1935 Drepanosticta tenella : Lieftinck (1935) : Original description of both sexes, “Gisting and environs”, Mount Tanggamus, Lampung , Sumatra , p. 7, Fig. 1 ; Lieftinck (1954) : Distribution (western Sumatra added without details), habitat, p 37. Notes. Lieftinck (1935) described D. tenella from the south of Sumatra , giving illustrations of the male anal appendages in dorsal and lateral view. Unfortunately Lieftinck’s description is made largely by comparison to the earlier published description ( Lieftinck 1929 ) of D. gazella Lieftinck, 1929 from Java (which does not belong in the D. carmichaeli -group based on the structure of its posterior pronotal lobe, also see the discussion here). Later Lieftinck (1954) added the west of Sumatra to the distribution of D. tenella without giving any details. The illustrations of the anal appendages of D. tenella in Lieftinck (1935) show cerci conforming to our definition of the D. carmichaeli - group (in fact resembling those of D. wildermuthi sp. nov . , in lateral view) and also paraprocts conforming to the group, with a clear subbasal spur visible in both dorsal and lateral views. Although parts of the paraprocts are not visible in Lieftinck’s illustrations he states that they are “shaped much as in gazella ” and the paraprocts of D. gazella lack any character to distinguish it from the species of the D. carmichaeli -group. The prothorax of both sexes of D. tenella also conforms to the definition of the D. carmichaeli -group and we therefore include it in that group. The genital ligula of D. tenella has not been illustrated. Based on the measurements provided by Lieftinck (1935) this is the smallest member of the D. carmichaeli -group. However these measurements are from a single population and it is very likely that greater variation would be found if additional specimens were measured. Distribution. Indonesia ( Sumatra ) ( Fig. 13 )