Plant, animal, bacterium, and fungus.
Binomial nomenclature (also called binominal nomenclature or binary nomenclature) 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. Prior to the adoption of the modern binomial system of naming species, a scientific name consisted of a generic name combined with a specific name that was from one to several words long. Together they formed a system of polynomial nomenclature. These names had two separate function The Latin names for individual species are written using a system termed binomial nomenclature that was developed originally by Linnaeus. Quite literally, each species is identified by a combination of two names: its genus name and its specific epithet. A familiar example is that of human beings, Homo sapiens.  Such a name is called a binomial name (which may be shortened to just binomial), a binomen or a scientific name; more informally it is also called a Latin name. The first part of the name identifies the genus to which the species belongs; the second part identifies the species within the genus. Prior to the adoption of the modern binomial system of naming species, a scientific name consisted of a generic name combined with a specific name that was from one to several words long. Together they formed a system of polynomial nomenclature. These names had two separate function Science writing and editing: How to write scientific names. The Latin scientific name of a species, be it plant, animal, bacterium, fungus, etc., is a two-part name consisting of the genus name first (by the way: one genus, two genera) and the species name second. For example, the domestic cat is known as Felis catus. When a species is being formally introduced in a scientific paper the name of the author (the person who first described the species in academic literature) is usually given. The system of nomenclature used today is based on the binomial system of nomenclature, developed by Linnaeus in the late 1700's. The binomial system of nomenclature is structured so that the scientific name of a plant consists of two names: (1) the genus or generic name, and (2) the specific epithet or species name. There are rules to follow when writing a scientific name.  Scientific names. The scientific name of a species is governed by internationally accepted rules that determine what the name is and insure that each species has only one. Thus scientific names are the same in every locality and in every language. Each scientific name of a species is two words (a binomen) the first is the name of the genus to which the species is assigned, the second is the specific name. The genus name is capitalized, the specific name is not, and both are printed in italics.  In modern usage, the first letter of the first part of the name, the genus, is always capitalized in writing, while that of the second part is not, even when derived from a proper noun such as the name of a person or place. Similarly, both parts are italicized when a binomial name occurs in normal text. Prior to the adoption of the modern binomial system of naming species, a scientific name consisted of a generic name combined with a specific name that was from one to several words long. Together they formed a system of polynomial nomenclature. These names had two separate functions The system of nomenclature used today is based on the binomial system of nomenclature, developed by Linnaeus in the late 1700's. The binomial system of nomenclature is structured so that the scientific name of a plant consists of two names: (1) the genus or generic name, and (2) the specific epithet or species name. There are rules to follow when writing a scientific name. Genus Name The genus name is written first. 
https://en.wikipedia.org/wiki/Binomial_nomenclature http://abacus.bates.edu/~ganderso/biology/resources/writing/HTWlatin.html https://en.wikipedia.org/wiki/Binomial_nomenclature http://blog.vancouvereditor.com/2011/03/science-writing-and-editing-scientific.html http://www.pinguicula.org/pages/divers/correctly_writing_plant_names.htm http://entnemdept.ifas.ufl.edu/walker/buzz/h00names.htm https://en.wikipedia.org/wiki/Binomial_nomenclature http://generalhorticulture.tamu.edu/h202/labs/lab3/sciname.html
writing scientific species names