Burmagomphus chaukulensis, a new species of dragonfly (Odonata: Anisoptera: Gomphidae) from the Western Ghats, Maharashtra, India
The Oracle of Delphi—a molecular phylogenetic approach to Greek Cordulegaster Leach in Brewster, 1815 (Odonata: Anisoptera: Cordulegastridae)
Paracordulia calcarulata, new species from Ecuador and notes on the genus Paracordulia Martin, 1907 (Odonata: Anisoptera: Corduliidae s. str.)
The rediscovery of Machadagrion garbei (Santos, 1961) (Odonata: Coenagrionidae) with notes on the hitherto unknown female
Heteragrion calafatiensis (Odonata: Heteragrionidae) sp. nov. from Northern Brazil
A new species of Progomphus Selys, 1854 (Odonata: Anisoptera: Gomphidae) from Minas Gerais state, Southeastern Brazil
Ischnura elegans malikovae subspecies nova (Odonata, Coenagrionidae) from the Far East of Eurasia, with discussion of other possible subspecies
The damselfly genus Megaloprepus (Odonata: Pseudostigmatidae): Revalidation and delimitation of species-level taxa including the description of one new species
Analysis of male Leptagrion Selys, 1876 sensu lato (Odonata: Coenagrionidae) with description of four new genera and a new species
Danowhetaksa gen. nov. with two species from the early Eocene Ølst Formation from Denmark, the first Palearctic Whetwhetaksidae (Odonata: Cephalozygoptera)
Kishenehna prima, a new genus and species of darner dragonfly (Odonata, Aeshnidae, Gomphaeschninae) from the early middle Eocene Kishenehn Formation of Montana, USA
Untangling the waterfall damsels: a review of the Mesoamerican genus Paraphlebia Selys in Hagen, 1861 (Odonata: Thaumatoneuridae) with descriptions of 11 new species
Ischnura praematura sp. nov. (Odonata: Zygoptera: Coenagrionidae): a species from Yunnan (China) whose females mate in the teneral state
Nesobasis rito sp. nov. (Zygoptera: Coenagrionidae), a new species of forest damselfly from Vanua Levu, Fiji
Drepanosticta hansruedii Phan, 2021, a new replacement name for Drepanosticta wildermuthi Phan, 2021 (Odonata: Zygoptera: Platystictidae)
Variation in Fukienogomphus prometheus (Lieftinck, 1939) reveals Stylurus takashii (Asahina, 1966) as a junior synonym, with discussion on the status of F. choifongae Wilson & Tam, 2006 (Odonata: Gomphidae)
Leptagrion jeromei (Odonata: Coenagrionidae) spec. nov. from Brazil, with notes on L. andromache Hagen in Selys, 1876
A new Idioneura Selys, 1860 for the Brazilian fauna with analysis of the other species (Odonata: Protoneuridae)
A review of the Drepanosticta carmichaeli-group, with the description of D. wildermuthi sp. nov. from the Central Highlands of Vietnam (Odonata: Zygoptera: Platystictidae)
The genus Ophiogomphus Lieftinck, 1964 in Vietnam, with descriptions of the female of O. minimus Karube, 2014 and O. phantoani sp. nov. (Odonata: Gomphidae)
Morphological description of the final instar larvae of Argia reclusa Selys, 1865 and Tigriagrion aurantinigrum Calvert, 1909 from Southeastern Brazil (Odonata: Coenagrionidae)
Description of the larva of Argia cuprea (Hagen, 1861) with notes on its phylogenetic affinities (Odonata: Coenagrionidae)
The head of Cephalozygoptera (Odonata)
The genus Planaeschna McLachlan, 1895 and its subgroupings in Vietnam, with descriptions of three new species (Odonata: Aeshnidae)
DENNIS R. PAULSON & MILEN MARINOV (2021) Zootaxa 20th Anniversary Celebration: Odonata section. Zootaxa, 4979: 218–221.
Four new species of Wahnesia Förster, 1900 from the D’Entrecasteaux, Louisiade and Woodlark island groups, Papua New Guinea (Odonata: Argiolestidae)
Erratum: RODOLFO NOVELO-GUTIÉRREZ & ROBERTO ARCE-PÉREZ (2021) Description of the larva of Micrathyria paulsoni González-Soriano, 2020 (Odonata: Libellulidae). Zootaxa, 4981: 357–364.
Erratum: RODRIGO ROUCOURT CEZÁRIO & RHAINER GUILLERMO-FERREIRA (2021) Heteragrion gorbi sp. nov. (Odonata: Heteragrionidae) from southeastern Brazil. Zootaxa, 4965: 078–086.
Synopsis of Lestes from Brazil with description of Lestes demarcoi sp. nov. (Zygoptera: Lestidae)
Description of Microgomphus farrelli sp. nov. (Odonata: Anisoptera: Gomphidae) based on adults of both sexes and larvae from Northern Thailand
