Amitermes

Soldiers are distinguished from other termite genera by the combination of: bulbous head capsule; sickle-shaped mandibles with a single tooth on the inner margin; and prominent cephalic glands with a circular fontanelle on the frons. The mandibular tooth shape varies among species and serves as a diagnostic character. For Australian species, identification keys exist for both alates and soldiers.

Soldiers possess a bulbous head capsule and sickle-shaped mandibles, each with a single tooth of variable shape on the inner margin. All species have a large cephalic gland opening to a circular fontanelle on the frons. When disturbed, soldiers emit a terpenoid secretion that oozes onto setae surrounding the fontanelle. Alates (winged reproductives) have been described for multiple species, though worker morphology varies among species.

Species occur in diverse habitats including deserts, arid rangelands, coastal deserts, rainforests, and mesic environments. The Australian Amitermes group radiated from monsoon region ancestors into arid zones and other biomes. Some species construct carton tubes or sheets around grass stems for protection from desiccation and predators.

Cosmopolitan distribution spanning Australia (major radiation with continent-wide distribution), North and South America (including California, Panama, Peru, Brazil, Argentina), Africa (Egypt, Nigeria), and Southeast Asia (Sumatra). The ancestor of the Australian group arrived from Southeast Asia approximately 11–10 million years ago.

Wood-feeding; Amitermes evuncifer has been observed feeding on Terminalia superba, Khaya grandifoliola, Milicia excelsa, Mansonia altissima, and Brachystegia eurycoma. Some desert-dwelling species feed on live and dead grasses, forbs, and livestock manure.

Incomplete metamorphosis with caste differentiation into workers, soldiers, and reproductives (alates). Colony foundation occurs through pairs of alates establishing new nests. Development includes egg, nymph, and adult stages. Specific developmental timing varies by species and climate.

Subterranean nesting with tunneling behavior. Soldiers exhibit defensive behavior involving cephalic gland secretion emission when confronted by antagonists. Foraging behavior has been documented in A. evuncifer. Some species engage in collective nest-building with individual transportation of excavated material.

Decomposers that break down plant material, including wood and grasses, contributing to nutrient cycling. Desert termites facilitate water infiltration through soil and reduce plant material to available nutrients. In arid environments, they may denude grass cover during droughts, potentially affecting soil erosion patterns.

Generally not considered major structural pests. Desert termites in Texas rangeland have been studied for their impact on forage production, though no insecticides are labeled for their control. Some species may affect pasture and hayfield productivity. Research interest in gut symbionts and evolutionary diversification patterns.

• MicrocerotermesLargest genus in subfamily Amitermitinae; distinguished by soldier mandible morphology and head capsule structure
• GnathamitermesDesert-dwelling termite with similar ecology; distinguished by different soldier head and mandible morphology, and exhibits distinct kicking behavior during tunneling rather than individual transportation

• Termitidae
• higher termites
• desert termites
• wood-feeding
• Australia
• soldier morphology
• rapid diversification
• gut symbionts

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Hay and Pasture Insects - AgriLife Extension Entomology
• Digging Deep: The Secrets Within Termite Nests
• Amitermes Archives - Entomology Today
• Mystery Growths on Termites Lead to Major Review of Ectoparasitic Fungi
• Protozoa in Termites of the Genus Amitermes
• Foraging behaviour ofAmitermes evunciferSilvestri (Isoptera, Termitidae, Amitermitinae)
• Microbiology of the Hindgut and Survival of Amitermes evuncifer (Silvestri) on Some Nigerian Woods
• Rapid diversification of the Australian Amitermes group during late Cenozoic climate change
• A contribution to the systematics of the genus Amitermes (Isoptera : Termitidae) in Australia
• A new termite species (Isoptera: Termitidae: Termitinae: Amitermes) and first record of a Subterranean Termite from the Coastal Desert of South America
• Rapid diversification of the Australian Amitermes group during late Cenozoic climate change
• Comparative anatomy of the gut of the South American species of Amitermes, with description of two new species and an identification key based on soldiers and workers