Four new genera of the Ceratonotus group (Copepoda, Harpacticoida), including the description of two new species
Aretopsis sandybrucei, a new deep-water shrimp (Malacostraca: Decapoda: Caridea: Alpheidae) from the Coral Sea
Hossein Ashrafi et al.
42-57, Published on 06 October 2021, art. 774 (42) 
Five new and five known species of the genus Tylencholaimus de Man, 1876 (Nematoda: Dorylaimida: Tylencholaimoidea) from Western Ghats of India
Middle Ordovician Drepanoistodus (Vertebrata, Conodonta) from Baltica, with description of three new species
Jan Audun RASMUSSEN et al.
106-134, Published on 08 October 2021, art. 774 (106) 
Three new species of the subterranean genus Guiodytes from Guangxi, China (Coleoptera: Carabidae: Clivinini)
Sunbin HUANG et al.
135-154, Published on 11 October 2021, art. 774 (135) 
The caridean shrimps of the genus Lysmata Risso, 1816 (Decapoda: Lysmatidae) from Madagascar collected during the Atimo-Vatae expedition: a new species and two new records
Hossein Ashrafi et al.
155-177, Published on 12 October 2021, art. 774 (155) 
Morphology and zoogeography of the burrower-like gammarid Gammarus koshovi (Bazikalova, 1946) (Crustacea, Amphipoda, Gammaridae) – An overlooked and poorly known species in the Siberian fauna
Dmitry A. SIDOROV et al.
178-199, Published on 13 October 2021, art. 774 (178) 
