Description of new chiactine-bearing sponges provides insights into the higher classification of Calcaronea (Porifera: Calcarea)

The genera and species of the Brueelia-complex (Phthiraptera: Philopteridae) described by Mey (2017)

Descriptions of four new species of the Ambrysus signoreti Stål species complex (Heteroptera: Nepomorpha: Naucoridae

New species of Anacanthorus (Dactylogyridae: Anacanthorinae) from the gills of Hoplerythrinus unitaeniatus and Erythrinus erythrinus (Characiformes: Erythrinidae) of the coastal drainage in the Eastern Amazon, Brazil

A new genus with three new species of free-living marine nematodes of the subfamily Desmodorinae (Nematoda: Desmodoridae), from the continental shelf off northeastern Brazil

Mascarapion, a new genus of the Apioninae (Coleoptera, Curculionoidea) from the Mascarene Islands

Four new species of the spider genus Cicurina Menge, 1871 from China (Araneae: Dictynidae)

A study on the genus Stenus Latreille from Shenzhen City of Guangdong, South China (Coleoptera, Staphylinidae)

A new species of Nothobrya Arlé, 1961 (Collembola: Entomobryidae) from Brazil and notes on key characters for Nothobryinae taxonomy, with an identification key to the species of the subfamily

Corrigenda and Addenda to the Article “The taxonomic history of Indo-Papuan groundsnakes, genus Stegonotus Duméril et al., 1854 (Colubridae), with some taxonomic revisions and the designation of a neotype for S. parvus (Meyer, 1874)” by Kaiser et al. (2018)

Replacement names for four preoccupied talitrid genus-group names proposed by Lowry & Myers in 2019 (Crustacea, Amphipoda, Senticaudata)

First records of Leptopezella Sinclair & Cumming (Diptera: Hybotidae: Ocydromiinae) from Brazil