In zoological nomenclature, a type species is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen. A similar concept is used for suprageneric groups and called a type genus.
Cygnus cygnus, the whooper swan, is the type species of the genus Cygnus.
In biology, a type is a particular specimen of an organism to which the scientific name of that organism is formally associated. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage, a type was a taxon rather than a specimen.
Type specimen for Marocaster coronatus
A gossamer-winged butterfly, Jamides elioti: 1) dorsal and 2) ventral aspect of holotype, 3) dorsal and 4) ventral aspect of paratype
Type illustration of Mormopterus acetabulosus
The common toad, Bufo bufo described by Linnaeus, is the type species for the genus Bufo