Description of the larva of Argia cuprea (Hagen, 1861) with notes on its phylogenetic affinities (Odonata: Coenagrionidae)

Sturgeons (Acipenseridae) from the Late Miocene of Ukraine, with a discussion of materials associated with Widhalm’s (1886) nomen nudum, †Acipenser euhuso

Molecular systematics and genital morphology of the Neotropical cockroaches from the genus Xestoblatta (Blattellidae)

Three new Zodarion species (Araneae: Zodariidae) from Southeastern Turkey

Discovery of the genus Strangulotilla Nonveiller, 1979 (Hymenoptera, Mutillidae) in India and description of a new species from the Western Ghats

Re-descriptions of eight chigger mite species (Acariformes: Trombiculidae) of the Leptotrombidium generic complex from Vietnam

Peregrinations of the caddisfly Limnephilus affinis Curtis 1834 in the summit areas of the French Jura Mountains and Northern Prealps (Trichoptera, Limnephilidae)

A new species of Caridina H. Milne Edwards, 1837 (Family: Atyidae) from a limestone cave on Interview Island, Andaman and Nicobar Islands, India

Cherax latimanus sp. nov., a new burrow-dwelling freshwater crayfish (Decapoda, Parastacidae) from the mid-Murray River catchment, Australia

The first record of Cavernulina orientalis (Thomson & Simpson, 1909) (Octocorallia: Pennatulacea: Veretillidae) from the Bay coast of Visakhapatnam, Andhra Pradesh

Is it time to describe new species without diagnoses?—A comment on Sharkey et al. (2021)

A new species of nine-spined stickleback, Pungitius modestus (Gasterosteiformes, Gasterosteidae), from northern Honshu, Japan

Morphological groupings within Euphlyctis (Anura: Dicroglossidae) and description of a new species from the surroundings of Thattekad Bird Sanctuary, Kerala, India

A new species of Andean golden poison frog (Andinobates, Dendrobatidae) from the Eastern Andes of Colombia