References for Genus 

Group of individuals that were/are able to reproduce to produce offspring. The second part of the name is used to classify an organism in the classification system made by Carolus Linnaeus.

Species in Biology 

One or more genera grouped together, distinguishes differences within an order. May be divided into subfamilies.

Family Classification 

A groups of species that share similarities based on common ancestry. The first part of the name used to classify an organism in the classification system made by Carolus Linnaeus

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From largest/most general to smallest/most specific:

- domain
- kingdom 
- phylum (in zoology) / division (in botany)	
- class 
- order
- family
- genus
- species

Main Taxonomic Ranks in Biology

Breedlove, S. & Watson, N. (2017). Behavioral neuroscience, eighth edition. Oxford University Press.

Behavioral Neuroscience 8th Edition

One or more families grouped together, distinugishes differences within a class.

Superorders and suborders are sometimes added between order and class or family, respectively.

Order (biology)

One or more orders grouped together, distinguishes differences within a phylum/division.

Class (biology)

One or more phyla/divisions grouped together, distinguishes differences within a domain .

Kingdom (biology)

One or more classes grouped together, distinguishes differences within a kingdom.

Called phylum/phyla in zoology and division(s) in botany.

Phylum/Division (biology)

Genus 

In biological taxonomy, a domain is the highest taxonomic rank widely accepted for the classification of organisms.

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