Helix is a genus of large, air-breathing land snails native to Europe and the Mediterranean region. They are the type genus of the family Helicidae, and are among the first animal genera described by Carl Linnaeus. Members of the genus first appeared during the Oligocene. Like most land snails, Helix species are hermaphroditic, and like other helicids, a courting pair will impale each other with hormone-rich love darts prior to exchanging sperm. Well-known species include Helix pomatia and Helix lucorum. Cornu aspersum – another well-known helicid – was originally described as a member of Helix, but the prevailing classification places it as the sole member of the sister genus Cornu.
Leuciscus is a genus of fish belonging to the family Cyprinidae. They are inland water fishes commonly called Eurasian daces. The genus is widespread from Europe to Siberia. Species broadly distributed in Europe include the common dace Leuciscus leuciscus and the ide L. idus.
Avicularia is a genus of the family Theraphosidae containing various species of tarantulas. The genus is native to tropical Central and South America. Each species in the genus has very distinguishable pink foot pads.
Acipenser is a genus of sturgeons. With 17 living species, it is the largest genus in the order Acipenseriformes. They are native to freshwater and estuarine systems of Eurasia and North America, and most species are threatened. Several species also known to enter near-shore marine environments in the Atlantic, Arctic and Pacific oceans.
Acarus is a genus of mites in the family Acaridae.
Archaeidae, also known as assassin spiders and pelican spiders, is a spider family with about ninety described species in five genera. It contains small spiders, ranging from 2 to 8 millimetres long, that prey exclusively on other spiders. They are unusual in that they have "necks", ranging from long and slender to short and fat. The name "pelican spider" refers to these elongated jaws and necks used to catch their prey. Living species of Archaeidae occur in South Africa, Madagascar and Australia, with the sister family Mecysmaucheniidae occurring in southern South America and New Zealand.
Mactra is a large genus of medium-sized marine bivalve mollusks or clams, commonly known as trough shells or duck clams. Mactra is the type genus within the family Mactridae.
Trochus is a genus of medium-sized to large, top-shaped sea snails with an operculum and a pearly inside to their shells, marine gastropod molluscs in the family Trochidae, the top snails.
The Scolopendridae are a family of large centipedes. Two Asian members of this family, Scolopendra cataracta and Rhysidia ceylanica, are known to show amphibious behaviour.
Scolopendra is a species-rich genus of large tropical centipedes of the family Scolopendridae.
Trombidium is a genus of mite with about 30 described species.
Patella is a genus of sea snails with gills, typical true limpets, marine gastropod mollusks in the family Patellidae, the true limpets.
Cymbiola is a genus of large predatory sea snail, a marine gastropod mollusk in the family Volutidae, the volutes.
Ellobium is a genus of medium-sized, air-breathing, saltmarsh snails, terrestrial pulmonate gastropod mollusks in the family Ellobiidae.
Athleta is a genus of sea snails, marine gastropod mollusks in the family Volutidae.
Luria is a genus of sea snails, marine gastropod molluscs in the subfamily Luriinae of the family Cypraeidae, the cowries.
Polyxenus is a genus of millipede in the order Polyxenida, containing at least 30 valid species as of 2012.
Archaea is an extinct genus of spiders in the family Archaeidae. As of October 2016, four species are placed in the genus. All have been found preserved in amber, either from the Baltic or Bitterfeld, Germany. First described in 1854, Archaea species have a distinctive "neck" separating the head from the thorax, and very long chelicerae ("jaws").
Mastigusa is a genus of dwarf sheet spiders that was first described by Anton Menge in 1854. As of May 2019 it contains only three species: M. arietina, M. lucifuga, and M. macrophthalma.
