Taxonomic status of Macaronesian Eucyclops agiloides azorensis (Arthropoda: Crustacea: Copepoda) revisited – morphologysuggests a Palearctic origin
Maria HOŁYŃSKA et al.
1-28, Published on 13 May 2021, art. 750 (1)
Four new species and new records of Platygastrinae (Hymenoptera: Platygastridae) from Iran
Maryam ASADI-FARFAR et al.
29-51, Published on 14 May 2021, art. 750 (2) 
Integrative taxonomy reveals a rare and new cusk-eel species of Luciobrotula (Teleostei, Ophidiidae) from the Solomon Sea, West Pacific
Man-Kwan WONG et al.
52-69, Published on 17 May 2021, art. 750 (3) 
Three new genera from South America and some taxonomic changes in Gyponini (Insecta: Hemiptera: Cicadellidae)
Clayton C. GONÇALVES et al.
70-93, Published on 18 May 2021, art. 750 (4) 
Revision of type specimens of Astaena (Coleoptera: Scarabaeidae: Melolonthinae: Sericini) described by L.W. Saylor
Thaynara L. PACHECO et al.
94-123, Published on 19 May 2021, art. 750 (5) 
Selizitapia gen. nov. (Hemiptera: Fulgoromorpha: Flatidae) from tapia woodlands of Madagascar
Dariusz ŚWIERCZEWSKI & Adam STROIŃSKI
124-139, Published on 20 May 2021, art. 750 (6) 
Arganiella Giusti & Pezzoli, 1980 (Caenogastropoda: Truncatelloidea: Hydrobiidae): a widespread genus or several narrow-range endemic genera?
Diana DELICADO et al.
140-155, Published on 21 May 2021, art. 750 (7) 
The Smicridea (Smicridea) fasciatella species group (Trichoptera: Hydropsychidae) in Brazil: six new species and new distributional records
Gleison R. DESIDÉRIO et al.
156-196, Published on 24 May 2021, art. 750 (8) 
