Type specimens of birds in the Natural History Museum, University of Oslo, Norway

Two new surprising species of leaf-litter toad of the Rhinella margaritifera species group (Anura: Bufonidae) from the Peruvian Amazon, Loreto—Peru

Revision of the New Zealand endemic genus Pseudoscelolabes Collin (Diptera: Hybotidae: Ocydromiinae)

Two new species of non-marine Ostracoda (Crustacea) of the genera Vestalenula Rossetti & Martens, 1998 (Darwinuloidea) and Microloxoconcha Hartmann, 1954 (Cytheroidea) from Tsushima, Japan, and a summary of the non-marine ostracod fauna of the island

The unexpected gecko: A new cryptic species within Urocotyledon inexpectata (Stejneger, 1893) from the northern granitic Seychelles

Mazax akephaloi sp. nov.—a new Neotropical spider species resembling ‘headless’ Ectatomma ants (Araneae: Corinnidae: Castianeirinae)

Phylogenetic relationships of southern Wallacean ranid frogs (Anura: Ranidae: Hylarana)

Erratum: OKAN KÜLKÖYLÜOĞLU, BENJAMIN T. HUTCHINS, MEHMET YAVUZATMACA & BENJAMIN F. SCHWARTZ (2021) Hyporheic ostracods (Crustacea, Ostracoda) from Texas (USA) with six new species. Zootaxa, 5046: 001–063.