Psalidomyrmex procerus

Quick Summary

• Difficulty: Hard
• Origin & Habitat: West and Central Africa, found in Ghana, Guinea, Gabon, Cameroon, Democratic Republic of Congo, Kenya, Burundi, and Uganda. Lives in lowland forest at 375-640m elevation, nesting in rotten wood, beneath logs, or directly in soil ^[1][2][3].
• Colony Type: Unknown, the number of queens per colony has not been documented. Most Ponerinae species are monogyne, but this is not confirmed for P. procerus.
• Size & Growth:
  • Queen: size data unavailable
  • Worker: size data unavailable
  • Colony: Up to 300 workers (estimated based on similar Ponerinae species)
  • Growth: Slow
  • Development: Estimated 8-12 weeks at optimal temperature (Ponerine ants generally have longer development times than many common species. First workers (nanitics) will be smaller than mature workers.)
• Antkeeping:
  • Temperature: Keep at 24-27°C, matching their natural lowland forest climate ^[2]. Use a heating cable on one side of the nest to create a gradient if room temperature falls below 24°C.
  • Humidity: High humidity (70-80%) is essential. Keep the nest substrate consistently moist but not waterlogged. These ants naturally nest in rotting wood and damp soil, so monitor moisture closely and rehydrate as needed ^[2].
  • Diapause: No, as a tropical species, they do not require hibernation. Maintain warm temperatures year-round.
  • Nesting: They prefer nesting in moist rotten wood or damp soil. In captivity, use a naturalistic setup with damp soil and pieces of rotting wood or cork, or a Y-tong (aerated autoclaved concrete) or plaster nest with high humidity chambers. Avoid dry conditions ^[2].
• Behavior: Workers are relatively docile toward humans but will sting if threatened. They forage solitarily, hunting earthworms and other soil prey alone ^[2][7]. Their small size (unknown exact measurements) means excellent escape prevention is needed, use tight-fitting lids and fine mesh barriers. Most foraging activity likely occurs during evening and night hours.
• Common Issues: slow colony growth can frustrate keepers expecting rapid development, specialized diet means they need live earthworms or appropriate prey, standard ant foods won't work, high humidity requirements can lead to mold if ventilation is poor, wild-caught colonies may carry parasites that can devastate the colony in captivity, their potent sting requires caution despite their docile nature

Housing and Nest Setup

Set up a moist, naturalistic environment that mimics their habitat in rotting wood and damp soil. A terrarium with damp soil substrate and pieces of rotting wood or cork works well. You can also use a Y-tong (aerated autoclaved concrete) or plaster nest with high humidity chambers. The key is keeping the nest material consistently moist but not waterlogged. Provide a water reservoir in the outworld and ensure the nest has access to moisture. Since worker size is unknown but likely small, seal any gaps to prevent escapes ^[2].

Feeding and Diet

This is the most critical aspect of keeping P. procerus. They are specialist earthworm predators and will not survive on typical ant diets. Provide live earthworms, red wigglers, or other soil-dwelling worms as their primary food. Small earthworms (around 4cm) are ideal, workers seize the anterior end, sting to paralyze the rest, then retrieve the entire worm ^[4][5][6]. Larger earthworms may be only partially retrieved if the worm autotomizes. They are solitary hunters, not raiding in groups ^[2][7]. Feed every 2-3 days, removing uneaten prey after 24 hours. Sugar water or honey is unlikely to be accepted.

Temperature and Humidity

As a tropical lowland species, P. procerus needs warm, humid conditions year-round. Keep temperatures between 24-27°C ^[2]. A heating cable on top of the nest (not underneath) can help if your room is cooler. Humidity should be 70-80%, the nest substrate should feel damp to the touch. Mist the nest area periodically but ensure good ventilation to prevent mold. Avoid temperatures below 22°C or above 30°C. No hibernation is needed, keep them warm continuously.

Colony Development

Colony growth is slow for this species. The founding type is unconfirmed, so the queen's initial behavior is unknown. Once she starts laying, eggs develop through larvae and pupae. Under optimal conditions (24-27°C), first workers may emerge in an estimated 8-12 weeks. These first workers (nanitics) will be smaller than mature workers. A healthy colony may reach up to 300 workers over several years. Patience is essential, do not disturb the queen during early stages, as stress can cause her to abandon or eat her brood.

Behavior and Temperament

Psalidomyrmex procerus workers are relatively docile toward humans but have a potent sting. They forage alone, hunting earthworms and other soil prey ^[2][7]. When hunting, they use their venom to paralyze prey before retrieval ^[4][5]. Their small size (exact measurements unknown) means they can squeeze through tiny gaps, use fine mesh and sealed edges for escape prevention. The colony will establish a central nest area and workers will venture out to hunt.

Common Keeping Problems

The biggest challenge is their specialized diet, without live earthworms, the colony will starve. Second, their slow growth tests patience. Third, maintaining high humidity without causing mold requires balance: use adequate ventilation while keeping substrate moist. Fourth, wild-caught colonies may carry parasites, quarantine new colonies carefully. Finally, tropical temperature requirements mean they cannot tolerate cold, keep them warm year-round.

Frequently Asked Questions

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References