A new species of Lyriothemis Brauer, 1868 from Vietnam and Thailand (Odonata Libellulidae) Author Kompier, Tom Schoutenstraat 69, 2596 SK Den Haag, the Netherlands. Author Holden, James Forest Floor Lodge, Cat Tien National Park, Vietnam. Author Makbun, Noppadon 211 / 5 Moo 4, Takhli, Nakhon Sawan, 60140, Thailand. text Zootaxa 2021 2021-02-23 4933 4 586 594 journal article 7743 10.11646/zootaxa.4933.4.9 7076f014-afc2-452a-9929-90e36f8d5b22 1175-5326 4556807 F9BC8BB0-18BB-44D9-AF33-862CAC25278F Lyriothemis pallidistigma sp. nov. ( Figs 1B , 2 , 3 , 4 , 5 B–D) Type specimens . Holotype : ³, 11.4416 N , 107.4291 E , Cat Tien NP , Dong Nai Prov. , southern Vietnam , 5.VIII.2014 , TK leg . Paratypes : 1 ♀ , same locality, date and collector as holotype (used for description); 2 ³³ 1 ♀ , 11.4418 N , 107.4289 E , Cat Tien NP , Dong Nai Prov. , southern Vietnam , 4.VIII.2018 , JH leg.; 2 ³³ 1 ♀ , 12.7525 N , 102.2368 E , Makham , Chantaburi Prov. , Thailand ( 19 m alt.), 14.VII.2018 , NM leg.; 2 ³³ 1 ♀ , same locality and collector, 30. VI .2019 . Additional observations : 1 ♀ , Cat Tien NP , Dong Nai Prov. , southern Vietnam , 19.VII.2014 , JH; 1 ³, Cat Tien NP , Dong Nai Prov. , southern Vietnam , 24.VII.2014 , JH; 3 ³³ 1 ♀ , 11.4416 N , 107.4291 E , Cat Tien NP, Dong Nai Prov. , southern Vietnam , 5.VIII.2014 , TK ; 1 immature ³, Cat Tien NP, Dong Nai Prov. , southern Vietnam, 14. VI .2017 , JH; 1 ³, same date and location as previous, 9.VII.2017 , JH; 1 ³ 1 ♀ , Makham , Chantaburi Prov. , Thailand , 15.VII.2018 , NM ; 10 ♀♀ , 12.4556 N , 102.4199 E , Khao Saming , Trat Prov. , Thailand ( 12 m alt.), 18.VII.2020 , Udomsak Sribal . Etymology. The species epithet pallidistigma refers to the cream-white pterostigmata of the male, rare amongst Lyriothemis . From Latin, meaning “pale mark”.