Barbus is a genus of ray-finned fish in the family Cyprinidae. The type species of Barbus is the common barbel, first described as Cyprinus barbus and now named Barbus barbus. Barbus is the namesake genus of the subfamily Barbinae, but given their relationships, that taxon is better included in the Cyprininae at least for the largest part.
Salmo is a genus of ray-finned fish from the family Salmonidae, which includes all European species of salmon and trout, among them the familiar Atlantic salmon and the brown trout. The single Salmo species naturally found in the Atlantic North America is the Atlantic salmon, whereas the salmon and trout of the Pacific basin belong to another genus, Oncorhynchus. The natural distribution of Salmo also extends to North Africa and to West Asia around the Black Sea basin.
Pardaliscidae is a family of amphipods, whose members typically inhabit the deepest parts of ocean basins. It contains the following genera:
Cobitis is a genus of small freshwater fish in the family Cobitidae from temperate and subtropical Eurasia. It contains the "typical spiny loaches", including the well-known spined loach of Europe. Similar spiny loaches, occurring generally south of the range of Cobitis, are nowadays separated in Sabanejewia.
Squalius is a genus of fish in the family Cyprinidae found in Europe and Asia. Hybridization is not rare in the Cyprinidae, including this genus. S. alburnoides is known to be of ancient hybrid origin, with the paternal lineage deriving from a prehistoric species related to Anaecypris; the latter mated with ancestral S. pyrenaicus. Present-day S. alburnoides mates with sympatric congeners of other species.
Eudontomyzon is a genus of lamprey in the family Petromyzontidae. Most species are found in Eastern Europe.
Bogidiella is a genus of crustacean in the family Bogidiellidae, containing the following species:
Gammarus is an amphipod crustacean genus in the family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimal conditions, particularly in terms of salinity, and different tolerances; Gammarus pulex, for instance, is a purely freshwater species, while Gammarus locusta is estuarine, only living where the salinity is greater than 25‰.
Niphargus is by far the largest genus of its family, the Niphargidae, and the largest of all freshwater amphipod genera.
Pelasgus is a genus of cyprinid fishes that is only found in the Balkans. There are currently seven described species in this genus.
Martensia martensi is a species of amphipod crustacean, and the only species in the genus Martensia. It occurs in waters around Svalbard at depths of 37–95 metres (121–312 ft).
Pselaphus is a genus of ant-loving beetles in the family Staphylinidae. There are at least 20 described species in Pselaphus.
Limnodriloides is a genus of clitellate oligochaete worms.
Aulophorus is a genus of Naididae.
Dendrobaena is a genus of annelids belonging to the family Lumbricidae.
Tatriella is a genus of annelids belonging to the family Lumbriculidae.
Delaya is a genus of annelids belonging to the family Haplotaxidae.
Epirodrilus is a genus of annelids belonging to the family Naididae.It's class is Clitellata.
Haber is a genus of annelids belonging to the family Naididae.
Thalassodrilides is a genus of annelids belonging to the family Naididae.
