DNA evidence seems to support an African origin for the trogons, with the African genus Apaloderma seemingly basal in the family, and the other two lineages, the Asian and American, breaking off between 20-36 million years ago.

The trogons are split into three subfamilies, each reflecting one of these splits, Aplodermatinae is the African subfamily and contains a single genus, Apaloderma ; Harpactinae is the Asian subfamily and contains two genera, Harpactes and Apalharpactes.

The genus Borya contains tree-like species which behave as " resurrection plants ".

It contains only one genus, Xanthorrhoea, endemic to Australia.

Allieae contains only one genus Allium ( Milula is merged with Allium in the latest systems ).

* Athene ( owl ), a genus that contains two to four living species of small owls

The family Haliotidae contains only one genus, Haliotis.

That genus contains about four to seven subgenera.

The genus also contains several well-known ornamental plants, such as Amaranthus caudatus ( love-lies-bleeding ), a native of India and a vigorous, hardy annual with dark purplish flowers crowded in handsome drooping spikes.

However, the tree constructed by the living tree project, a collaboration between ARB-Silva and LPSN where a 16S ( and 23S if available ) tree of all validated species was constructed, the genus Bacillus contains a very large number of nested taxa and majorly in both 16S and 23S it is paraphyletic to Lactobacillales ( Lactobacillus, Streptococcus, Staphylococcus, Listeria, etc.

* Dinosaur genus list contains data tables on nearly every published Mesozoic dinosaur genus as of January 2011.

The African elephant genus contains two living species ; whereas the Asian elephant species is the only surviving member of the Asian elephant genus, but can be divided into four subspecies.

A member of the Cryptobranchidae family, hellbenders are the only members of the Cryptobranchus genus, and are joined only by one other genus of salamanders ( Andrias, which contains the Japanese and Chinese giant salamanders ) at the family level.

The genus Actinidia contains around 60 species.

Acidithiobacillus contains 5 species and the sole genus in its order Acidithiobacillales

* Phoebis, a genus of Coliadinae that is not itself called the Sulfurs but that contains a number of species which are

The genus Sarcophilus contains two other species, known only from Pleistocene fossils: S. laniarius and S. moomaensis.

The genus contains at least 68 described extant taxa, but the true number of species is a matter of debate.

The genus Salmo contains the Atlantic salmon, found in the north Atlantic.

The genus Oncorhynchus contains eight species which occur naturally only in the north Pacific.

This genus is of great interest since it contains thale cress ( Arabidopsis thaliana ), one of the model organisms used for studying plant biology and the first plant to have its entire genome sequenced.

Magnolia subgenus Magnolia can not be renamed because it contains Magnolia virginiana, the type species of the genus and of the family.

Panthera is a genus of the family Felidae ( cats ), which contains four well-known living species: the tiger, the lion, the jaguar, and the leopard.

Some authorities further divide this genus into three, splitting off the smooth-fronted caimans into a genus Paleosuchus and the Black Caiman into Melanosuchus.

The genus is divided into three subgenera:

Like other members of the genus, all three are aerobes capable of producing endospores.

Chipmunks may be classified either as a single genus, Tamias, or as three genera: Tamias, which includes the eastern chipmunk ; Eutamias, which includes the Siberian chipmunk ; and Neotamias, which includes the 23 remaining, mostly western, species.

The subfamily Homininae can be further subdivided into three tribes, each with only a single living genus: Gorillini ( gorillas ), Panini ( chimpanzees ), and Hominini ( humans and their extinct relatives ).

The researchers found three equally divergent genetic units within the genus: Cryptobranchus alleganiensis alleganiensis, and two distinct eastern and western populations of Cryptobranchus alleganiensis bishopi.

Although the word jackal has been historically used to refer to many small-to medium-sized species of the wolf genus of mammals, Canis, today it most properly and commonly refers to three species: the black-backed jackal and the side-striped jackal of sub-Saharan Africa, and the golden jackal of northern Africa and south-central Eurasia.

In the taxonomy of Linnaeus there are three kingdoms, divided into classes, and they, in turn, into orders, families, genera ( singular: genus ), and species ( singular: species ), with an additional rank lower than species.

It is one of three species of puffin that make up the Fratercula genus and is easily recognizable by its thick red bill and yellow tufts.

All three belong to the genus Equus, along with other living equids.

Several new species have been discovered, and they are now grouped into three genera, with the two former members of the now defunct genus Galagoides returned to their original genus Galago:

Cannabis (; Cán-na-bis ) is a genus of flowering plants that includes three putative varieties, Cannabis sativa, Cannabis indica, and Cannabis ruderalis.

According to these, a genus should fulfill three criteria to be descriptively useful:

Taxonomically there are three choices ; 1: to join Michelia and Yulania species in a common genus, not being Magnolia ( for which the name Michelia has priority ); 2: to raise subgenus Yulania to generic rank, leaving Michelia names and subgenus Magnolia names untouched ; or 3: to join Michelia with genus Magnolia into genus Magnolia s. l.

There are three species in the Gadus genus currently called cod:

The leopard (), Panthera pardus, is a member of the Felidae family and the smallest of the four " big cats " in the genus Panthera, the other three being the tiger, lion, and jaguar.

Most authorities recognize three species within the perch genus:

Of the three North American species of genus Umbra, one, U. limi, possesses a limited capability for air breathing.

The three species of small waterfowl in the genus Nettapus are named " pygmy geese ", e. g. the Cotton Pygmy Goose ( N. javanica ).