Tetramorium kelleri

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Northern and western Madagascar, Nosy Be, Nosy Mangabe, Nosy Ngontsy, and Mayotte. Found in rainforest, littoral rainforest, tropical dry forest, and secondary forest at elevations 5-780 m ^[1].
• Colony Type: Unconfirmed, social structure has not been studied. Most Tetramorium species are monogyne (single queen), but this has not been confirmed for T. kelleri.
• Size & Growth:
  • Queen: unknown, size data unavailable
  • Worker: ~3-4 mm (estimated based on related Tetramorium species, total length not reported in research) ^[1]
  • Colony: unknown, estimated up to several hundred workers based on typical Tetramorium sizes, but no data for this species
  • Growth: Moderate, guessed from tropical Tetramorium patterns (no species‑specific data)
  • Development: estimated 4-8 weeks at optimal tropical temperatures (inferred from closely related species, not confirmed) (Development timeline is unconfirmed. The queen remains sealed in her founding chamber until the first workers appear.)
• Antkeeping:
  • Temperature: Estimated 24-28 °C. Being from tropical Madagascar, they need warm conditions. Avoid prolonged temperatures below 20 °C. A heating cable on one side of the nest helps create a gradient ^[1].
  • Humidity: Moderate to high, keep nest substrate damp but not waterlogged. The species occurs in rainforest and littoral rainforest, so it tolerates higher humidity ^[1].
  • Diapause: No, as a tropical species from Madagascar, they do not require hibernation. Maintain warm temperatures year‑round.
  • Nesting: Y‑tong (AAC) or plaster nests are suitable. These materials hold humidity well, which this species seems to appreciate. Provide tight chambers that match their small size.
• Behavior: Behavior in captivity is not well‑documented. Based on subfamily traits (Myrmicinae, tribe Crematogastrini), this ant uses a 'smear' defense, a modified stinger that wipes venom onto enemies rather than piercing. Workers are likely active foragers in search of food. Their small size means escape prevention is critical, use fine mesh and tight seals. They are not considered aggressive and pose no danger to keepers.
• Common Issues: escape prevention is critical, tiny workers can slip through standard gaps, colonies may decline if kept too cold, maintain tropical temperatures (24-28 °C), overfeeding can lead to mold in the nest, remove uneaten food promptly, wild‑caught colonies may carry parasites, quarantine and observe before adding to a permanent setup, founding phase may be slow, patience is required as queens can take weeks to produce first workers

Housing and Nest Setup

Tetramorium kelleri does well in Y‑tong (AAC) or plaster formicariums that hold humidity. Because the ants are small (workers ~3-4 mm estimated), choose a nest with tight chambers. Y‑tong nests allow easy observation and good moisture retention. Plaster nests are also suitable. Provide a small outworld for foraging. Ensure all connections are sealed, these tiny ants can squeeze through gaps that look negligible. A test tube with a water reservoir works for founding colonies. Once the colony has ~20-30 workers, move them to a larger nest to allow expansion. ^[1]

Feeding and Diet

Like most Tetramorium species, T. kelleri is a generalist omnivore. Offer protein sources such as small insects (fruit flies, small mealworms, crickets) and provide sugar in the form of honey water or sugar water. They will also accept small seeds. Feed every 2-3 days, adjusting based on colony size and consumption. Remove uneaten food promptly to prevent mold. For founding colonies, offer tiny food items the queen can handle, small insect pieces work better than live prey that might escape.

Temperature and Humidity

Being native to tropical Madagascar, these ants need warm conditions, estimated 24-28 °C ^[1]. This range supports normal activity and brood development. Use a heating cable on one side of the nest to create a gradient, allowing ants to choose their preferred spot. Avoid temperatures below 20 °C for extended periods. For humidity, aim for moderate to high, keep the nest substrate damp but not waterlogged. The species has been collected from rainforest and littoral rainforest, so it tolerates higher humidity ^[1]. A water reservoir in a test tube or a plaster nest helps maintain moisture.

Colony Development

Colony founding is thought to be claustral, the queen seals herself in a chamber and survives on stored fat reserves until her first workers emerge. This timeline is not confirmed, based on related Tetramorium, it may take 4-8 weeks at optimal temperatures. The first workers (nanitics) will be smaller than mature workers and will start foraging immediately. Growth rate is estimated as moderate, with colonies potentially reaching several hundred workers. The extremely long propodeal spines and large eyes are distinctive traits of this species ^[1].

Behavior and Temperament

Workers are likely active foragers. Their defense mechanism is 'smear', a flattened, spatulate stinger that wipes venom onto enemies rather than piercing (common in tribe Crematogastrini). They are not considered aggressive and pose no threat to keepers, they may bite if handled but are too small to cause discomfort. The species is known for being common and conspicuous in its native range ^[1]. Workers use chemical trails to communicate, so consistent feeding locations help them find food efficiently. The long propodeal spines may have a defensive role, making them appear larger to predators.

Frequently Asked Questions

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References