Nasutitermitinae

Soldiers are immediately recognizable by the nasus—a horn-like or elongated frontal projection absent in other termite subfamilies. The combination of vestigial mandibles and this fontanellar gun distinguishes Nasutitermitinae from all other termite groups. Workers lack the nasus and require examination of gut structure or molecular analysis for definitive identification to subfamily.

Soldiers possess a distinctive elongated frontal projection (nasus) on the head, from which chemical weaponry is expelled. Mandibles are reduced or vestigial in the soldier caste. Workers have conventional termite morphology with functional mandibles. Nests vary from inconspicuous internal cavities to conspicuous arboreal or epigeal structures depending on genus.

Occurs across diverse tropical and subtropical habitats including tropical rainforest, woodland, and disturbed areas. Specific habitat associations vary by genus: Hospitalitermes and Constrictotermes are notable for forming extensive arboreal or surface foraging columns in open forest, while other genera occupy more cryptic nesting sites within wood or soil.

Near-cosmopolitan in tropical and subtropical regions. Documented from Papua New Guinea (22 species), Australia, Neotropics (including first non-endemic U.S. establishment in Florida), West Africa, and Amazonia. New records continue to extend known ranges, with some species distributions expanding over 1,000 km with additional sampling.

Wood-feeding; many species consume dead wood on living trees and structural wood. Specific dietary breadth varies by species—some feed on diverse wood species, others may have more restricted substrates. No evidence of soil-feeding or fungus-cultivation in this subfamily.

Hemimetabolous development with caste differentiation producing reproductives, soldiers, and workers. Imago caste (winged reproductives) described for multiple genera including Caetetermes and Coendutermes. Colony foundation and detailed developmental stages not documented in available sources.

Soldiers employ chemical defense via the fontanellar gun, projecting substances from the nasus to deter predators such as ants. Hospitalitermes and Constrictotermes exhibit distinctive open-air foraging behavior, forming visible trails across forest surfaces and vegetation. Some species construct conspicuous nests observable from ground level.

Decomposers of wood and plant material in tropical and subtropical ecosystems. Contribute to nutrient cycling through breakdown of lignocellulosic material. Some species may significantly impact wooden structures, with Nasutitermes corniger recognized as economically important.

Nasutitermes corniger (conehead termite) represents the first non-endemic establishment of family Termitidae in the United States (Florida), where it damages structural wood and dead wood on living trees. Some species are significant economic pests of timber and wooden structures. Research interest in chemical defense mechanisms and caste evolution.

• Other Termitidae subfamiliesLack the nasus and fontanellar gun; soldiers retain functional mandibles for defense
• RhinotermitidaeLower termites with different gut symbiont complement and soldier morphology lacking nasus

• termites
• higher termites
• chemical defense
• nasus
• fontanellar gun
• tropical
• wood-feeding
• caste differentiation

• BugGuide
• Wikipedia
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Collecting in Australia’s remote McIlwraith range | Beetles In The Bush
• Tropical fungus gardeners: Leafcutter ants, Atta spp. — Bug of the Week
• THE AUSTRALIAN TERMITE GENUS OCCULTITERMES EMERSON (ISOPTERA: TERMITIDAE: NASUTITERMITINAE)
• The nasute termites (Isoptera : Nasutitermitinae) of Papua New Guinea
• Conehead Termite Nasutitermes corniger (Motschulsky) (Insecta: Blattodea: Termitidae: Nasutitermitinae)
• Observation on Cyranotermes Araújo, with a description of C. Caete, new species. (Isoptera, Termitidae, Nasutitermitinae)
• Coendutermes tucum Fontes (Isoptera, Termitidae, Nasutitermitinae): description of the imago caste and additional notes
• A taxonomic revision of the neotropical termite genus Diversitermes (Isoptera: Termitidae: Nasutitermitinae)
• Caetetermes taquarussu Fontes (Isoptera, Termitidae, Nasutitermitinae): description of the imago caste and new distributional records 
• Dismantling of a New Structure Associated With Foraging in the West African Termite Trinervitermes geminatus (Wasmann) (Isoptera: Termitidae: Nasutitermitinae)
• New records for Coatitermes pallidus (Snyder, 1926) and Coatitermes clevelandi (Snyder, 1926) (Isoptera, Termitidae, Nasutitermitinae) from Amazonia
• Nasutitermes aurantius (Isoptera, Termitidae, Nasutitermitinae), a new nasutiform termite species from Panama and a key to soldiers of Central American Nasutitermes Dudley, 1890.