Tetramorium pylacum

Quick Summary

• Difficulty: Hard
• Origin & Habitat: West African rainforest leaf litter. Found in Ivory Coast, Cameroon, Central African Republic, and Ghana. Also recorded in gardens and bathrooms in Cameroon ^[3] and in green spaces of Abidjan ^[2]. Collected via leaf litter sampling, pitfall traps, and hand collecting ^[1].
• Colony Type: Unknown, social structure has not been directly studied for this species.
• Size & Growth:
  • Queen: Unknown, queen not described in available literature
  • Worker: 3.3-3.7 mm ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, inferred moderate from tropical Tetramorium
  • Development: 6-10 weeks (estimated from genus patterns) (Development time is unconfirmed, based on typical Tetramorium development at 24-28°C.)
• Antkeeping:
  • Temperature: No species-specific data. Based on rainforest habitat, keep nest at 24-28°C. Avoid drops below 22°C. Use a heating cable on the top of the nest to create a gradient.
  • Humidity: High, keep substrate consistently moist but not waterlogged. Provide a humidity gradient with a drier area in the outworld. Balance with ventilation to prevent mold.
  • Diapause: No, tropical species, active year-round.
  • Nesting: Leaf litter and soil in nature. In captivity, use a naturalistic setup with moist soil/leaf mix, or a Y-tong/plaster nest with small chambers. Ensure tight seals due to tiny worker size.
• Behavior: Generalist predators ^[4]. Workers are active ground foragers, likely using chemical trails. Escape risk is high due to small size, use fine mesh (
• Common Issues: escape prevention critical due to 3-4 mm workers, use fine mesh and tight-fitting lids, high humidity requirements may cause mold if ventilation is poor, balance with airflow, tropical species may struggle if temperatures drop below 22°C, monitor closely, very limited species-specific information, keepers must observe and adjust care based on colony behavior

Housing and Nest Setup

Since the species is poorly studied, base the setup on typical rainforest leaf‑litter ants. Use a naturalistic nest with a mix of soil, coconut fiber, and leaf litter. A Y‑tong (AAC) or plaster nest also works, as you can control moisture. The small worker size (3.3-3.7 mm) means chambers and passages should be narrow, use a test tube or small tank with fine‑grain substrate. All connections must be tight, apply fluon or a similar barrier to the rims. Good ventilation is important to prevent condensation and mold ^[1].

Feeding and Diet

Tetramorium pylacum is a generalist predator ^[4]. Offer small live prey such as fruit flies, pinhead crickets, or small mealworms 2-3 times per week. Provide a constant sugar source like honey water or sugar water. Remove uneaten protein after 24-48 hours to avoid mold. Young colonies may accept smaller prey items first.

Temperature and Humidity

Based on its rainforest habitat, maintain warm, stable temperatures (24-28°C) and high humidity. The substrate should feel damp but not waterlogged. Mist the nest when it starts to dry, but allow short drying periods to avoid stagnant humidity. Never place a heating pad under the nest, use a cable on top or side. Monitor for mold and adjust ventilation ^[1].

Colony Development

There is almost no published data on colony development. Founding behavior (claustral or semi‑claustral) is unknown. Based on genus patterns, a queen may seal herself in a chamber and raise the first workers on stored reserves. The first nanitics likely emerge after 6-10 weeks at 24-28°C, but this is unconfirmed. Colony growth rate and maximum size are not documented. Observe your colony closely and adjust care as needed. ^[1]

Behavior and Temperament

Workers are active ground foragers. They have been collected in leaf litter, as ground foragers, and in disturbed habitats such as gardens and green spaces ^[3][4][2]. As generalist predators, they hunt small arthropods. In captivity, they are not particularly aggressive but will defend the nest. Their small size means they can squeeze through tiny gaps, use fine mesh (

Frequently Asked Questions

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References