Strumigenys quinquedentata

Strumigenys quinquedentata

Strumigenys quinquedentata is a remarkably tiny ant, measuring just 2.7-2.8mm in total length. Workers have a distinctive appearance with fine longitudinal rugulae on the head, long flagellate hairs at the pronotal humeri, and extremely long slender hairs on the first gastral tergite that can be curved, filiform, or even narrowly looped at the tip. The mandibles feature a unique cuticular lamella extending from the preapical tooth to the base, and there are two intercalary denticles. This species is part of the Strumigenys godeffroyi group and represents one of the very few strumigenyiform ants found in Western Australia, where it is common in the southwest corner and occasionally appears in suburban Perth gardens. These ants move slowly and deliberately, emerging from multiple entrance holes in sandy soils, often with moderate excavated soil surrounding each opening.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to Western Australia, specifically the southwest corner region. Found in sandy soils in both natural areas and suburban gardens in Perth.
• Colony Type: Colony structure is not well documented. Strumigenys species typically form small colonies with single queens (monogyne), though some species can have multiple queens. The colony type for this specific species remains unconfirmed.
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Not specifically documented for this species, queens are expected to be slightly larger than workers (3-4mm estimated based on genus patterns)
  • Worker: 2.7-2.8mm total length
  • Colony: Likely small colonies, Strumigenys species typically have colonies ranging from dozens to a few hundred workers. Exact maximum unknown for this species.
  • Growth: Moderate, based on typical Strumigenys development patterns
  • Development: Estimated 6-10 weeks at optimal temperature based on related species in the genus (Development time is not specifically documented for S. quinquedentata, estimates based on typical Strumigenys patterns in the Myrmicinae subfamily)
• Antkeeping:
  • Temperature: Keep at room temperature around 20-24°C. As a Western Australian species, they prefer moderate warmth. Avoid temperatures below 15°C or above 30°C.
  • Humidity: Moderate humidity around 50-70%. Sandy soil habitats suggest they prefer well-drained substrates that don't remain waterlogged. Provide a moisture gradient so ants can choose their preferred zone.
  • Diapause: Unconfirmed, Western Australian temperate species may have reduced activity in cooler months but full hibernation requirements are unknown.
  • Nesting: Natural nesting occurs in sandy soils with multiple entrance holes. In captivity, a naturalistic setup with sandy substrate or a well-drained plaster/acrylic nest works well. Avoid overly humid or wet conditions.
• Behavior: These ants are slow-moving and deliberate in their movements. They are predatory, hunting small arthropods like springtails and micro-arthropods. As very small ants (under 3mm), they have significant escape risk and require excellent escape prevention with fine mesh barriers. They are not aggressive toward keepers but will defend their colony if threatened.
• Common Issues: escape prevention is critical due to their tiny 2.7mm size, they can squeeze through standard mesh, slow movement makes them vulnerable to predators in multi-species setups, small colony size means losses have bigger impact on population, predatory diet requires live small prey, they may not accept commercial ant foods, sandy soil nesting means they need well-drained substrates, not waterlogged nests

Housing and Nest Setup

For such tiny ants, you'll need excellent escape prevention. Use test tubes with cotton plugs for founding colonies, or a naturalistic setup with sandy substrate for established colonies. A Y-tong (AAC) nest with small chambers works well since their colonies stay relatively small. The key is providing well-drained substrate, these ants naturally nest in sandy soils where water doesn't pool. Avoid overly compact or wet substrates that can drown small colonies. A shallow foraging area makes it easier to spot prey items.

Feeding and Diet

Strumigenys quinquedentata is predatory, like most Strumigenys species. Their primary food should be small live prey, springtails are ideal and most readily accepted. Other micro-arthropods like booklice, grain mites, and tiny fruit fly larvae can also be offered. They are unlikely to accept sugar water or honey since they're not honeydew feeders. Feed small prey items every 2-3 days, adjusting based on colony size and consumption rate. Remove uneaten prey to prevent mold issues.

Temperature and Seasonal Care

Keep your colony at room temperature, ideally 20-24°C. As a Western Australian species, they prefer moderate warmth rather than tropical heat. Room temperature in most homes (around 20-22°C) should be suitable. In winter, slight temperature reductions are acceptable but avoid cold rooms below 15°C. They don't require a formal hibernation but may show reduced activity in cooler months. Monitor colony behavior, if workers become sluggish, slightly increase temperature.

Behavior and Handling

These ants move slowly and deliberately, don't expect the frantic activity you see in larger ant species. They're peaceful toward keepers and won't bite aggressively. The main concern is their tiny size making them easy to accidentally crush or lose. When cleaning or moving colonies, be extremely gentle. They're not suitable for mixed-species setups where faster ants might outcompete them for food. Their slow movement is actually an adaptation for hunting small prey in leaf litter and soil.

Frequently Asked Questions