Termites

Definition

Eusocial insects in the epifamily Termitoidae (formerly order Isoptera, now placed within Blattodea) that consume decaying plant material, primarily cellulose in wood, leaf litter, and soil humus. Distinguished by moniliform (beaded) antennae, soft-bodied unpigmented workers, and complex caste systems comprising reproductives, soldiers, and workers. Despite historical misnomer as 'white ants,' termites are not ants but highly derived cockroaches, more closely related to certain cockroach lineages than those lineages are to other cockroaches. Ecologically dominant decomposers in tropical and subtropical ecosystems; approximately 2,997 extant species described, with family Termitidae containing the majority (2,125 species).

Etymology

From Latin termes (genitive termitis), 'woodworm, white ant,' related to terere, 'to rub, wear, erode.'

Example

Macrotermes colonies in African savannas construct towering mounds with sophisticated ventilation systems and cultivate fungal gardens on predigested plant material, illustrating the advanced eusocial behavior and ecological engineering capacity of higher termites.

Synonyms

• white ants (misnomer, obsolete in technical usage)
• Isoptera (former order name, now deprecated)

Related Terms

• eusociality
• Caste
• moniliform antennae
• Blattodea
• Termitidae
• cellulose digestion
• mound-building
• symbiotic flagellates
• lower termites
• higher termites

Usage Notes

Technical usage now avoids 'Isoptera' and 'white ants'; phylogenomic studies since 2007 firmly place termites within Blattodea. 'Lower termites' (non-Termitidae families) retain symbiotic gut flagellates for cellulose digestion; 'higher termites' (Termitidae) rely on bacterial symbionts and often external fungal cultivation. Distinguish from ants (Formicidae) by antennae structure, waist constriction (absent in termites), and wing venation in alates.