Strumigenys spathoda

Strumigenys spathoda

Strumigenys spathoda is a tiny predatory ant native to West African rainforests. Workers measure just 2.0-2.1mm, making them one of the smaller ant species you'll encounter . They have a distinctive appearance with very short, powerful mandibles, the shortest recorded for any Strumigenys in the Afrotropical region, and a medium brown coloration . Their most striking feature is the row of large spoon-shaped hairs along the leading edge of their flattened antennal scapes, giving them a somewhat fuzzy appearance under magnification . This species belongs to the Dacetini tribe (sometimes spelled Dacetonini), which are specialized predators known for their trap-jaw mandibles ^[1].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: West African rainforests, found in Cameroun, Gabon, Ghana, Ivory Coast, and Togo. They live in leaf litter in humid rainforest environments at elevations around 375m ^[1][2].
• Colony Type: Single-queen colonies (monogyne). Queens seal themselves in during founding (claustral).
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Unknown, not directly measured in available literature
  • Worker: 2.0-2.1mm
  • Colony: Likely small, under 100 workers typical for this genus
  • Growth: Slow, typical for small Myrmicinae
  • Development: Estimated 8-12 weeks at optimal temperature based on genus patterns (Direct development data unavailable, estimates based on typical Dacetini development at 24-26°C)
• Antkeeping:
  • Temperature: Keep at 24-26°C, they prefer warm, humid conditions matching their rainforest origin ^[1]
  • Humidity: High humidity is essential, aim for 70-85%. These ants live in leaf litter where moisture stays consistently high. Keep the nest substrate damp but not waterlogged.
  • Diapause: Not required, being from tropical West Africa, they don't need a winter rest period. Maintain consistent warmth year-round.
  • Nesting: Y-tong (AAC) nests work well due to their small size. Provide a shallow foraging area with moist substrate. They prefer tight, humid chambers scaled to their tiny 2mm body size.
• Behavior: These are shy, slow-moving ants that hunt small prey. They use their short but powerful mandibles to capture tiny invertebrates. They're not aggressive and will flee rather than fight. Escape prevention is critical, at 2mm, they can slip through standard test tube cotton. Use fine mesh barriers and ensure all connections are sealed. They are not stinging ants.

Housing and Escape Prevention

Because Strumigenys spathoda workers are only 2mm long, escape prevention is your biggest challenge. These tiny ants can squeeze through gaps that seem impossible. Use fine mesh (at least 0.5mm) on any ventilation holes, and check all connections between the nest and outworld. Test tube setups work but require tight-fitting cotton or rubber stoppers, standard cotton batting may be too loose. A Y-tong (AAC) nest with narrow chambers scaled to their size is ideal. The foraging area should be shallow since these small ants struggle to navigate tall spaces. Always use a barrier like fluon around the edges of the outworld to prevent escapes ^[2].

Feeding and Diet

Strumigenys ants are specialized predators in the Dacetini tribe. In the wild, they hunt small soil invertebrates like springtails, mites, and other micro-arthropods. In captivity, offer small live prey such as springtails, fruit flies, and tiny crickets. They need protein to raise brood, this is their primary food source. Sugar acceptance varies, you can offer a drop of honey or sugar water occasionally, but don't rely on it as a primary food. Feed small amounts 2-3 times per week, removing uneaten prey after 24 hours to prevent mold. The key is offering prey small enough for their tiny 2mm workers to handle ^[1][2].

Temperature and Humidity

Being from West African rainforests, these ants need warm, humid conditions. Keep the nest at 24-26°C consistently, avoid temperatures below 22°C or above 30°C. Use a heating cable on one side of the nest to create a gentle gradient if your room temperature is lower. Humidity should stay high at 70-85%. The substrate should feel damp to the touch, with some condensation occasionally visible on the nest walls. However, avoid standing water, they're from leaf litter, not waterlogged soil. A moisture gradient with damp areas on one side lets ants choose their preferred spot. Mist the outworld occasionally but avoid direct spraying on the nest ^[1].

Colony Development

Strumigenys spathoda colonies start with a claustral queen who seals herself in a small chamber and raises her first workers alone, living off stored fat reserves. The first workers (nanitics) will be tiny, even smaller than normal workers. Growth is slow, expect 8-12 weeks from egg to first worker at optimal temperature. Colonies likely stay small, probably under 100 workers in captivity. This is normal for the genus. Don't be tempted to overfeed or disturb the nest during founding, queens are sensitive to vibration and disturbance. Once the first workers emerge, you can begin regular feeding. Be patient with these slow-growing ants . ^[2]

Frequently Asked Questions

References