Molecular Phylogeny of the Family Cordulegastridae (Odonata) Worldwide.

In this study, we present the first attempt at a molecular phylogenetic analysis of the entire family of Cordulegastridae involving 60% of its known species. Our analysis is in favor of reclassification of the members of the family into four genera: (i) the monophyletic genus Selys, 1854, with the number of known species reduced by three synonymizations; (ii) the genus Leach in Brewster, 1815 including all members of the group and, as a preliminary solution, the American species Novelo-Gutiérrez, 2018 and, very tentatively, Selys, 1868. The group forms a genus of its own, for which we restored the name Selys 1854, stat.

The genus Planaeschna McLachlan, 1895 and its subgroupings in Vietnam, with descriptions of three new species (Odonata: Aeshnidae).

Twelve Planaeschna McLachlan, 1895 species recorded in Vietnam are presented and their subgroupings based on nuclear DNA analysis are discussed. Three new species are described (Planaeschna crux sp. nov.

A new species of Lyriothemis Brauer, 1868 from Vietnam and Thailand (Odonata: Libellulidae).

Lyriothemis pallidistigma sp. nov. (holotype male: Cat Tien National Park, Dong Nai Prov.

Five new species of Coeliccia Kirby, 1890 from Vietnam (Odonata: Platycnemididae), and information on several other species of the genus.

Five new species of Coeliccia (Coeliccia caerulea sp. nov. [holotype: Bao Loc, Lam Dong Prov.

A new species of Heliogomphus from Vietnam (Odonata: Gomphidae).

Heliogomphus bidentatus sp. nov. (holotype male: Tam Dao National Park, Vinh Phuc Prov.

Taxonomic notes on Indolestes Fraser, 1922 (Lestidae, Zygoptera). 3. Male and clarified type locality of Indolestes anomalus Fraser, 1946.

The male of Indolestes anomalus Fraser, 1946 is described and the holotype female is depicted. Its occurrence in Vietnam, Thailand and Malaysia is discussed, and the type locality is clarified (South Vietnam, Đồng Nai River basin).

Euphaea cyanopogon sp. nov. from the Cardamom ecoregion in Cambodia and Vietnam (Odonata: Euphaeidae).

Euphaea cyanopogon sp. nov. is described and illustrated from specimens of both sexes collected in the Kampongsaom Peninsula in southern Cambodia and the adjacent Phú Quốc Island in Vietnam, both in the Cardamom ecoregion; the holotype ♂ (at RMNH, Leiden) is from Kbal Chhay Waterfall, Cambodia.

The genus Asiagomphus in Vietnam, with descriptions of three new species, and first descriptions of the male of Asiagomphus auricolor (Fraser, 1926) and of the female of Asiagomphus reinhardti Kosterin Yokoi, 2016 (Odonata: Gomphidae).

The occurrence in Vietnam of eight species of Asiagomphus Asahina, 1985 is discussed. Three new species are described (Asiagomphus kosterini [holotype: Da Lat, Lam Dong Prov., (appr.

Amphicnemis valentini sp. nov. from the Cardamom ecoregion in Cambodia and Vietnam (Odonata: Coenagrionidae).

Amphicnemis valentini sp. nov. is described from the Ream Peninsula of Cambodia (holotype: Cambodia, Preah Sihanouk Province, Ream Peninsula, 10.

Protosticta curiosa Fraser, 1934 and its synonyms in Vietnam and China (Odonata: Platystictidae).

Protosticta zhengi Yu Bu, 2009 and Protosticta albifrons Kompier, 2016 are shown to be synonyms of P. curiosa Fraser, 1934. The general distribution of P.

Chlorogomphus canhvang sp. nov. from Central Vietnam (Odonata: Chlorogomphidae).

Chlorogomphus canhvang sp. nov. [holotype male: Along QL15, Quang Binh Province (appr.

Drepanosticta emtrai sp. nov. from Vietnam with a discussion of Drepanosticta vietnamica Asahina, 1997 (Odonata: Zygoptera: Platystictidae).

Drepanosticta emtrai sp. nov. is described from Vietnam (holotype male Ha Tinh Province, 9 vi 2015, to be deposited in RMNH).

A synopsis of the Euphaeidae (Odonata: Zygoptera) of Vietnam, with descriptions of two new species of Euphaea.

23 species of Euphaeidae (Odonata: Zygoptera) are reported from Vietnam including two new species of Euphaea, E. saola Phan Hayashi, sp. nov.

sp. nov. from eastern Cambodia and southern Vietnam, the eastern relative of Asahina, 1984 (Odonata: Platycnemididae).

Coeliccia rolandorum sp. nov. is described from the eastern Cambodia (holotype: Cambodia, Mondulkiri Province, Buu Sraa Waterfall environs, 12°34' N 107°24' E, ~780 m a.

A new species of Rambur, 1842 from Cat Tien National Park, Vietnam (Odonata: Aeshnidae).

Gynacantha cattienensis spec. nov. is described from Cat Tien National Park, Dong Nai Province, Vietnam, on the basis of male and female specimens.

spec. nov. from Central Vietnam (Odonata: Platycnemididae).

Coeliccia mientrung spec. nov. is described from central Vietnam.

The riddle of (Rambur, 1842): spec. nov. (Odonata: Libellulidae).

Lyriothemis kameliyae spec. nov. from northern Vietnam is described and illustrated for both sexes, and descriptions are given of male and female specimens of L.

Description of two new from Vietnam and central Laos with notes on their congeners in Vietnam (Odonata: Platycnemididae).

Descriptions are given of two new species of Calicnemia: C. akahara sp. nov.

New species of Protosticta Selys from Vietnam with a key to the males of the P. curiosa group (Odonata: Platystictidae).

Three new species of Protosticta Selys, 1855, are described from Vietnam: P. proboscis spec. nov.

Description of two new species of from Vietnam (Odonata: Platycnemididae).

Coeliccia hayashii sp. nov. (holotype male, from Doi waterfall, KaNat, K'Bang district, Gia Lai Province, central Vietnam, deposited in VNMN) and Coeliccia mattii sp.

ERRATUM: Formal description of Protosticta nigra spec. nov. from Vietnam.

Regrettably I neglected to indicate the type series for one of the new species described in Kompier (2016). Fixation of a holotype, or syntypes, is compulsory for names published after 1999 (ICZN 1999, Article 16.4.

Paracercion ambiguum sp. nov. from Lang Son, Vietnam (Zygoptera: Coenagrionidae).

One new species of Paracercion Weekers and Dumont, 2004 (Paracercion ambiguum Kompier & Yu, 2016, holotype male, Vietnam, Lang Son province, Huu Lien Nature Reserve, 1-XII-2013, deposited in Institute of Entomology, College of Life Sciences of Nankai University, Tianjin, China) is proposed on the basis of molecular and morphological evidence. A COI gene tree is presented for Paracercion species and several morphologically related genera. The species is described and illustrated for both sexes.

A study of the genus Protosticta Selys, 1855, with descriptions of four new species from Vietnam (Odonata: Platystictidae).

The genus Protosticta Selys, 1855 from Vietnam is revised. Four new species, P. ngoai spec.