In biology a section (Latin: sectio) is a taxonomic rank that is applied differently in botany and zoology.
Main article: Section (botany)
Within flora (plants), 'section' refers to a botanical rank below the genus, but above the species:
Within fauna (animals), 'section' refers to a zoological rank below the order, but above the family:
The International Code of Nomenclature for Bacteria states that the Section rank is an informal one, between the subgenus and species (as in botany).