A revision of Onychelmis Hinton, 1941 (Coleoptera: Elmidae),with description of new species, DNA barcoding andnotes on the geography of the genus
Marek LINSKÝ et al.
1-35, Published on 11 March 2021, art. 739 (1)
Taxonomic revision of the Afrotropical scarab beetle genus Cerhomalus Quedenfeldt, 1884 (Coleoptera: Scarabaeidae: Orphninae)
Andrey V. FROLOV & Lilia A. AKHMETOVA
36-50, Published on 12 March 2021, art. 739 (36) 
Review of Odontoscelio Kieffer, 1905 (Platygastroidea, Scelionidae) with the description of two new species from India
Kamalanathan VEENAKUMARI & Prashanth MOHANRAJ
51-91, Published on 15 March 2021, art. 739 (51) 
Morphological and molecular analysis of Willowsia nigromaculata (Collembola, Entomobryidae, Entomobryinae) reveals a new cryptic species from the United States
Nikolas G. CIPOLA & Aron D. KATZ
92-116, Published on 16 March 2021, art. 739 (92) 
Revision of the elusive ant genus Rhopalomastix (Hymenoptera, Formicidae, Myrmicinae) in Thailand based on morphology and DNA barcodes, with descriptions of three new species
Wendy Y. WANG et al.
117-157, Published on 17 March 2021, art. 739 (117) 
Gibbosaverruca weijiai, a new verrucid (Crustacea, Thoracica) species from the Weijia Guyot deep-sea seamount in the West Pacific
Zhibin GAN et al.
158-167, Published on 18 March 2021, art. 739 (158) 
Six new species of the genus Caccothryptus from the Himalayas (Coleoptera: Limnichidae)
