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
Re-description of Coeliccia erici Laidlaw, and the description of Coeliccia sameerae sp. nov. from Peninsular Malaysia (Odonata: Zygoptera: Platycnemididae)
Chlorogomphus canhvang sp. nov. from Central Vietnam (Odonata: Chlorogomphidae)