In biology, a genus (plural: genera) is a taxonomic rank used in the biological classification of living and fossil organisms. In the hierarchy of biological classification, genus comes:

  • above species; and
  • below family.

In binomial nomenclature (see below), the genus name forms the first part of the binomial species name for each species within the genus.

Binomial Nomenclature

This is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms (although they can be based on words from other languages).

Changes in names

Recently the names of several genera have changed. More here. And here.