Tetramorium zapyrum

Tetramorium zapyrum

Tetramorium zapyrum is a tiny dark brown ant native to West Africa, measuring just 2.7-3.2mm in total length ^[1]. Workers are dark brown with a blackish brown gaster (abdomen), and their body is covered in short fine hairs ^[1]. This species belongs to the Tetramorium angulinode species group and is the most common member of this group across West Africa ^[1]. They inhabit forested areas or areas that were once forested but are now cleared for agriculture, nesting in twigs or pieces of rotten wood on the ground ^[2]. These ants are small, ground-dwelling foragers that thrive in humid forest environments.

Quick Summary

• Difficulty: Easy
• Origin & Habitat: West Africa including Ghana, Burkina Faso, Cameroon, Gabon, Ivory Coast, Kenya, Liberia, and Nigeria. Found in forested areas or cleared agricultural land, nesting in twigs or rotten wood on the ground ^[2][1].
• Colony Type: Colony structure is unconfirmed. Based on typical Tetramorium patterns, likely single-queen colonies but this has not been directly documented.
• Size & Growth:
  • Queen: Unconfirmed, no documented queen measurements for this species
  • Worker: 2.7-3.2mm ^[1]
  • Colony: Unknown, no colony size data available. Based on related species, likely several hundred workers
  • Growth: Moderate, inferred from typical Tetramorium development patterns
  • Development: 6-10 weeks estimated based on similar small Myrmicinae species (Development time is estimated as no specific data exists for this species. Temperature will significantly affect development speed.)
• Antkeeping:
  • Temperature: Keep at 24-28°C, these are tropical forest ants that need warm, stable conditions ^[2]. Room temperature within this range works well.
  • Humidity: High humidity preferred, they naturally live in damp forest floor habitats. Keep nest substrate consistently moist but not waterlogged. Provide a water tube for drinking access.
  • Diapause: No diapause required, as a tropical species, they do not need hibernation. Maintain warm temperatures year-round ^[2].
  • Nesting: Natural nesting in twigs and rotten wood on the ground translates well to test tube setups or small acrylic nests. They prefer tight, humid chambers scaled to their tiny size. Y-tong (AAC) nests or test tube setups work well for founding colonies ^[2].
• Behavior: These are small, generally peaceful ants that forage on the ground. They are not aggressive and rarely sting, their small size means their stinger is not a concern for keepers. They are active foragers that search for small prey and honeydew. Escape prevention is important due to their tiny size, they can squeeze through small gaps. They are ground-nesting and do not climb well on smooth surfaces.
• Common Issues: tiny size means escapes are likely without fine mesh barriers and tight-fitting lids, high humidity requirements can lead to mold if ventilation is poor, small colony founding means slow initial growth, patience is needed, wild-caught colonies may carry parasites that can cause colony failure, test tube flooding can drown founding queens if water reservoirs are too large

Housing and Nest Setup

For Tetramorium zapyrum, a test tube setup works excellently for founding colonies. Use a small test tube with a water reservoir filled about one-third full, plugged with cotton. The queen will seal herself into a chamber at the end of the tube. These tiny ants need tight spaces, their small size means they can escape through gaps that would hold larger ants. Apply fluon or use fine mesh on any lid. Once the colony reaches 20-30 workers, you can move them to a small acrylic nest (Y-tong style works well) or keep them in a test tube setup with a foraging area. A small outworld (like a plastic container) connected to the nest with tubing gives them space to forage. Keep the nest area humid by occasional misting or using a water tube connected to the foraging area. ^[2]

Feeding and Diet

Tetramorium zapyrum is an omnivorous species that will accept a variety of foods. In captivity, offer small protein sources like fruit flies, pinhead crickets, or small mealworms. They also readily accept sugar water, honey, or diluted honey. Feed small amounts every 2-3 days, removing any uneaten food to prevent mold. For founding colonies, a drop of sugar water every few days is sufficient until the first workers emerge. After that, add small protein prey 2-3 times per week. These tiny ants have small appetites, a few drops of honey or a single small insect is enough for a colony of 10-20 workers. ^[2]

Temperature and Humidity

As a West African tropical species, Tetramorium zapyrum needs warm temperatures between 24-28°C. Room temperature in most homes falls within this range, but monitor with a thermometer. If your room is cooler, use a heating cable on one side of the nest to create a gentle gradient, never place heat directly on the nest as it can dry them out or cook the colony. High humidity is important, these ants naturally live in damp forest floor habitats. Keep the nest substrate consistently moist but never waterlogged. A water tube in the setup helps maintain humidity through evaporation. Avoid placing the nest near air conditioning vents or in drafty areas. ^[2]

Colony Development

A founding queen will lay eggs after sealing herself in a test tube chamber. She feeds on her stored fat reserves to produce the first brood, this is called claustral founding. The first workers (called nanitics) are typically smaller than normal workers and emerge after 6-10 weeks, though exact timing depends on temperature. After the first workers arrive, the colony enters a growth phase. The queen continues laying eggs while workers forage for food and care for the brood. Growth is moderate, expect several months to reach 50 workers, and over a year to reach larger colony sizes. Be patient with founding colonies as they grow slowly at first. Avoid disturbing the queen during the founding stage as stress can cause her to eat the brood.

Behavior and Temperament

These are peaceful, ground-dwelling ants that are not aggressive toward keepers. Workers are small and forage individually on the ground surface. They do not form large raiding parties or exhibit aggressive swarming behavior. Their small size means their sting is not painful to humans, most keepers report no reaction at all. They are not known for escaping aggressively, but their tiny size means they can slip through small openings. They are primarily active during the day but can be active at any time. Workers communicate using chemical signals (pheromones) and may form simple trails to food sources. They are not climbers and prefer to stay on the ground, which makes escape prevention easier once barriers are in place. ^[2]

Frequently Asked Questions

References