Strumigenys bequaerti

Strumigenys bequaerti

Strumigenys bequaerti is a tiny predatory ant measuring just 2.1-2.3mm in total length, belonging to the dacetine ant tribe Attini. Workers have a distinctive narrow head with long cylindrical funicular segments and extremely reduced propodeal teeth, so small they appear as mere angles. This species lacks the apicoscrobal hair that its close relative Strumigenys lujae possesses, making it identifiable under magnification. The species is found across the Afrotropical region in central and east Africa, including Cameroon, Democratic Republic of Congo, Gabon, Guinea, Kenya, Uganda, and Rwanda ^[1].

These ants are specialized predators that live in the humid understory of montane and lowland rainforests. They nest in soil and leaf litter in heavily shaded, damp areas, one nest was recorded at approximately 2200 meters altitude in the humid montane forest of the Butagu Valley on Ruwenzori. Their tiny size and cryptic lifestyle make them challenging to observe but fascinating to keep for experienced antkeepers.

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Afrotropical region, found in Cameroon, Democratic Republic of Congo, Gabon, Guinea, Kenya, Uganda, and Rwanda. Inhabits wet forest, rainforest, and evergreen forest at elevations from 2100-2200m. Nests in humid, strongly shaded soil^[1].
• Colony Type: Colony structure is not well documented. Based on related Strumigenys species, likely single-queen colonies (monogyne) with small colony sizes.
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Unknown for this species, related Strumigenys species have queens 3-4mm
  • Worker: 2.1-2.3mm total length, HL 0.54-0.66mm, HW 0.42-0.50mm
  • Colony: Likely small, probably under 500 workers based on typical Strumigenys colony sizes
  • Growth: Slow, typical for tiny predatory ants
  • Development: Estimated 8-12 weeks at optimal temperature based on related dacetine ants (Development time is not specifically documented for this species. Estimates based on typical Strumigenys patterns.)
• Antkeeping:
  • Temperature: Keep at 20-24°C, they come from cool montane forests and prefer stable, moderate temperatures. Avoid overheating.
  • Humidity: High humidity is essential, think damp forest floor. Keep the nest substrate consistently moist but not waterlogged. These ants live in permanently humid environments.
  • Diapause: Unknown, may require a mild cool period during winter months given their montane forest origin
  • Nesting: Use a naturalistic setup with moist soil/litter or a well-humidified acrylic/plaster nest. They prefer tight, humid chambers scaled to their tiny size. Test tubes can work if the cotton remains damp but not flooded.
• Behavior: These are cryptic, slow-moving ants that spend most of their time in hidden spaces. They are specialized predators, likely hunting springtails and other tiny soil arthropods. Workers forage individually through leaf litter rather than in visible trails. They are not aggressive and pose no threat to keepers. Their tiny size means escape prevention must be excellent, they can slip through remarkably small gaps.
• Common Issues: escape prevention is critical due to their very small size, use fine mesh barriers, colonies are slow-growing and small, making them vulnerable to disturbance, high humidity requirements can lead to mold problems if ventilation is poor, specialized diet makes feeding challenging, they need live micro-prey, wild-caught colonies may have parasites that are difficult to treat

Housing and Nest Setup

Strumigenys bequaerti requires a setup that recreates the humid, shaded conditions of their forest floor habitat. A naturalistic terrarium-style setup works well, use a layer of moist forest soil or peat mixed with leaf litter, which allows the ants to forage naturally through the substrate. Alternatively, a well-humidified acrylic or plaster nest with tight chambers scaled to their tiny size can work. The key is maintaining consistently high humidity without flooding. Use a water reservoir or misting system, but ensure proper drainage to prevent waterlogging. Because they are so small, even minor gaps in setup can lead to escapes, seal all connections thoroughly and use fine mesh on any ventilation holes. ^[1]

Feeding and Diet

Strumigenys bequaerti is a specialized predator that hunts tiny soil arthropods. In captivity, their primary food should be live springtails, these are ideal-sized prey that matches their natural diet. Other tiny arthropods like potworms (enchytraeids), minute soil mites, and newly hatched pinhead crickets may also be accepted. They are unlikely to accept sugar water or honey, as dacetine ants are not typically sugar-seekers. Feed small amounts of live prey every few days, removing any uneaten prey after 24 hours to prevent mold. The hunting behavior of watching these tiny predators stalk and capture springtails is fascinating to observe.

Temperature and Seasonal Care

Keep the nest at 20-24°C, this matches the cool conditions of their montane forest origin. They are not heat-tolerant and should be kept away from direct sunlight or heat sources. A slight temperature gradient allows the colony to self-regulate. Given their origin at 2100-2200m altitude, they may benefit from a mild seasonal cool period in winter, but this is not well-documented. Monitor colony activity to determine if they need a diapause period. Avoid temperature fluctuations and keep the setup away from drafts, air conditioning vents, and heating elements that could cause drying. ^[1]

Behavior and Observation

These ants are cryptobiotic by nature, they spend most of their time hidden within the substrate or nest, making them challenging to observe regularly. Workers move slowly and deliberately, searching through leaf litter and soil crevices for prey. They do not form visible foraging trails like many ants. Colonies remain small, typically with just a few dozen to a few hundred individuals. Despite their small size, they are not aggressive and cannot sting. Observation is best done with a magnifying glass or by setting up a naturalistic tank where you can watch them interact with their environment through the glass.

Acquiring and Establishing a Colony

Strumigenys bequaerti is rarely available in the antkeeping hobby due to its limited distribution and cryptic nature. If acquiring a colony, it will likely be from a specialized breeder or through careful field collection in its native range. Wild-caught colonies require careful acclimation to captive conditions. Quarantine new colonies and monitor for parasites, tiny ants are particularly vulnerable to mites and other pathogens. Once established, colonies grow slowly, so patience is essential. Do not disturb the colony frequently during the founding stage or when the queen is raising her first workers.

Frequently Asked Questions

References