Holometabola

Definition

A supra-ordinal clade of insects, also known as Endopterygota, comprising species that undergo complete metamorphosis (holometabolism). Members pass through four distinct life stages—egg, larva, pupa, and adult—with wings and other adult structures developing internally during the pupal phase. The larval and adult forms typically differ radically in morphology, ecology, and behavior. This clade includes the majority of described insect species and is nested within the infraclass Neoptera.

Etymology

From Greek hólos (complete, whole) + metabolḗ (change, transformation), referring to the dramatic reorganization of body plan during metamorphosis.

Example

Beetles (Coleoptera), butterflies and moths (Lepidoptera), and bees and wasps (Hymenoptera) are all members of Holometabola, sharing the derived trait of complete metamorphosis with a non-feeding pupal stage.

Synonyms

• Endopterygota

Related Terms

• holometabolous
• complete metamorphosis
• pupa
• larva
• Neoptera
• Parametabola
• Hemimetabola
• Pterygota

Usage Notes

Holometabola and Endopterygota are used interchangeably in modern taxonomy, though 'Endopterygota' emphasizes the internal (endo-) development of wings (pterygota) during the pupal stage, while 'Holometabola' emphasizes the complete (holo-) transformation of body plan. Contrast with Hemimetabola (incomplete metamorphosis). The clade is monophyletic and contains approximately 60% of all described insect species. Some phylogenetic analyses nest Strepsiptera within or near Coleoptera, though their placement remains actively studied.