Tetramorium legone

Tetramorium legone

Tetramorium legone is a tiny West African ant species measuring just 3.3mm in total length ^[1]. Workers are dark brown with a distinctive blackish gaster, and they possess a unique feature among African Tetramorium, the base of their first gastral tergite (the front part of the abdomen) is densely sculptured with fine punctures that can appear as minute striations ^[1][2]. This species belongs to the Tetramorium angulinode species group and is found across Benin, Ghana, and Nigeria in the Afrotropical region ^[3]. They nest in the ground in open, sandy areas and have been documented in mango orchards in Benin ^[3].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: West Africa (Benin, Ghana, Nigeria), ground nesting in open, sandy soils and agricultural areas like mango orchards ^[3][1]
• Colony Type: Colony structure is unconfirmed. Based on typical Tetramorium patterns, likely single-queen colonies.
• Size & Growth:
  • Queen: Unconfirmed, no documented queen measurements for this species
  • Worker: 3.3mm total length ^[1]
  • Colony: Colony size is unconfirmed, likely small to moderate based on typical Tetramorium patterns
  • Growth: Growth rate is unconfirmed
  • Development: Development timeline is unconfirmed. Based on typical Tetramorium patterns and West African climate, estimate 4-8 weeks at warm temperatures. (Estimate based on genus patterns, not directly studied for this species)
• Antkeeping:
  • Temperature: Keep warm around 24-28°C. West African species prefer tropical to subtropical temperatures. A heating cable on one side of the nest creates a suitable gradient.
  • Humidity: Moderate humidity with dry areas. These ants inhabit open, sandy soils in nature, so provide a mix of moist substrate and dry areas for them to choose from.
  • Diapause: No diapause required. As a West African species, they do not experience cold winters and remain active year-round.
  • Nesting: Ground-nesting species. In captivity, a naturalistic setup with sandy soil substrate works well, or a Y-tong/plaster nest with soil chamber. They need access to dry areas within the nest.
• Behavior: Workers are small at 3.3mm and likely forage for small prey and seeds. Based on typical Tetramorium behavior, they are probably moderate foragers with moderate aggression when defending the nest. Escape prevention is critical due to their tiny size, use fine mesh barriers and tight-fitting lids.
• Common Issues: escape prevention is critical, their tiny 3mm size means they can squeeze through standard barriers easily, slow colony growth may frustrate beginners who overfeed or overhandle the colony, ground-nesting behavior requires proper substrate depth and moisture balance, wild-caught colonies may carry parasites that can cause colony failure, maintaining proper humidity without waterlogging is tricky, too wet causes mold, too dry stresses the colony

Housing and Nest Setup

Since T. legone is a ground-nesting species that naturally lives in open, sandy soils, a naturalistic setup with a sandy soil substrate works best. Provide at least 3-5cm of substrate depth to allow them to dig chambers and tunnels. A Y-tong (AAC) nest with a soil chamber or a plaster nest with a dirt insert also works well. The key is offering a humidity gradient, some areas should be moist while others remain dry, allowing the ants to self-regulate. Use a small water reservoir connected to the substrate for moisture, but avoid flooding. For the outworld, a simple plastic container with a textured floor works for foraging. ^[1][3]

Feeding and Diet

Based on typical Tetramorium behavior, T. legone is likely omnivorous. Offer small protein sources like fruit flies, small mealworms, or other tiny insects. They probably also accept sugar sources like honey water or sugar water, especially if honeydew-producing insects are unavailable. In their natural habitat of mango orchards, they likely tend aphids for honeydew. Feed small amounts every 2-3 days and remove uneaten food promptly to prevent mold. Since workers are only 3.3mm, prey items should be appropriately sized, very small insects or pre-killed/crushed prey works better than large items.

Temperature and Heating

As a West African species from Benin, Ghana, and Nigeria, T. legone needs warm conditions. Keep the nest area at 24-28°C for optimal activity and brood development. Use a heating cable placed on top of the nest (never under it, as this causes excessive drying) to create a gentle temperature gradient. Room temperature alone may be insufficient, especially in cooler climates. Monitor with a thermometer and adjust heating to maintain consistent warmth. Avoid temperatures above 32°C as this can stress or kill the colony. ^[3]

Humidity Management

T. legone inhabits open, sandy soils in nature, suggesting they prefer moderate humidity with good drainage. The substrate should be moist but never waterlogged, think of well-drained sandy soil that holds some moisture without becoming soggy. Provide a water tube or small reservoir connected to the nest area, and check the substrate regularly. If condensation forms heavily on the nest walls, reduce watering. If the substrate dries out completely between the moist areas, increase water slightly. The presence of dry areas is important, these ants naturally live in environments with variable moisture. ^[3]

Escape Prevention

With workers measuring only 3.3mm, escape prevention is absolutely critical. Standard test tube setups may require additional barriers. Use fine mesh (0.5mm or smaller) on any ventilation holes. Apply Fluon or similar barrier grease to the upper edges of formicarium walls. When using test tubes, ensure the cotton plug is packed tightly. Check all connections and seams regularly, these tiny ants will find any gap. The term 'escape artists' doesn't fully capture the risk: at 3mm, they can slip through gaps that would stop larger ants. ^[1]

Colony Founding

Colony founding behavior is unconfirmed for this specific species. Based on typical Tetramorium patterns, the queen likely seals herself in a claustral chamber and raises the first workers alone on stored fat reserves. If you obtain a founding queen, provide a small test tube setup with moist cotton and place it in a warm, dark location. Do not disturb her during the founding period, this is the most common cause of colony failure. Wait at least 4-6 weeks before checking for the first workers (nanitics).

Frequently Asked Questions

References