The Living World — BIOLOGY STD 11 Science — Question

The taxonomic categories from species to kingdom are broad categories or obligate categories. However, taxonomists have also developed sub-categories in this hierarchy to facilitate more sound and scientific placement of various taxa. These sub-categories are sub-species (or varieties), sub-genera, sub-families, sub-orders, sub-classes and sub-phyla. These sub-categories are referred to as intermediate categories.

Obligate categories	Intermediate categories
Kingdom	Subkingdom
Phylum or Division	Subphylum or subdivision and superclass
Class	lnfra class and subclass
Orde	Superorder and suborder
Family	Subfamily and tribe
Genus	Subgenus
Species	Subspecies, variety or race