Biovar

A biovar is a variant prokaryotic strain that differs physiologically or biochemically from other strains in a particular species.

[1][2] Morphovars (or morphotypes) are those strains that differ morphologically.

Serovars (or serotypes) are those strains that have antigenic properties that differ from other strains.

This is a list of biovars and strains of biovars listed at the NCBI Taxonomy database:[3]