Genus is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.
The Interim Register of Marine and Nonmarine Genera (IRMNG) is a taxonomic database which attempts to cover published genus names for all domains of life, from 1758 in zoology up to the present, arranged in a single, internally consistent taxonomic hierarchy, for the benefit of Biodiversity Informatics initiatives plus general users of biodiversity (taxonomic) information. In addition to containing just over 500,000 published genus name instances as at May 2023, the database holds over 1.7 million species names, although this component of the data is not maintained in as current or complete state as the genus-level holdings. IRMNG can be queried online for access to the latest version of the dataset and is also made available as periodic snapshots or data dumps for import/upload into other systems as desired. The database was commenced in 2006 at the then CSIRO Division of Marine and Atmospheric Research in Australia and, since 2016, has been hosted at the Flanders Marine Institute (VLIZ) in Belgium.
Exsul is a genus of flies belonging to the family Muscidae.
Achnanthes is a genus of diatoms belonging to the family Achnanthaceae.
Acrolocha is a genus of beetles belonging to the family Staphylinidae.
Eucapsis is a genus of cyanobacteria belonging to the family Merismopediaceae.
Anomalocardia is a genus of bivalves belonging to the family Veneridae.
Maretiidae is a family of echinoderms belonging to the order Spatangoida.
Ammotrophus is a genus of echinoderms belonging to the family Clypeasteridae.
Nectria is a genus of echinoderms belonging to the family Goniasteridae.
Milteliphaster is a genus of echinoderms belonging to the family Goniasteridae.
Cladaster is a genus of echinoderms belonging to the family Goniasteridae.
Heligmosomoides is a genus of nematodes belonging to the family Heligosomidae.
Plebidonax is a genus of bivalves belonging to the family Psammobiidae.
Metalia is a genus of echinoderms belonging to the family Brissidae.
Ophiarachnella is a genus of echinoderms belonging to the family Ophiodermatidae.
Ophionereis is a genus of echinoderms belonging to the family Ophionereididae.
Plagiobrissus is a genus of echinoderms belonging to the family Brissidae.
Retithrips is a genus of thrips in the family Thripidae, first described in 1910 by Paul Marchal. These thrips are leaf-feeding.
