Pseudomyrmex depressus

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Neotropical region, Colombia, French Guiana, and Peru. Found in tropical forests, where they nest in dead twigs and hollow plant stems ^[1][2][3].
• Colony Type: Based on typical Pseudomyrmex patterns, likely monogyne (single queen colonies). Colony structure is not directly documented for this species.
• Size & Growth:
  • Queen: ~7-9 mm, inferred from Pseudomyrmex genus average
  • Worker: ~5-7 mm, inferred from Pseudomyrmex genus average
  • Colony: Up to several hundred workers, estimated from typical Pseudomyrmex colony sizes
  • Growth: Moderate
  • Development: Estimated 6-8 weeks at 24-28°C, based on related Pseudomyrmex species (Direct measurements for P. depressus are unavailable.)
• Antkeeping:
  • Temperature: Keep at 24-28°C year-round, inferred from tropical habitat. Use a heating cable on one side of the nest to create a gentle gradient.
  • Humidity: High humidity (70-85%), mimicking conditions inside dead twigs on a moist tropical forest floor. Keep nest substrate consistently moist but not waterlogged.
  • Diapause: No, tropical species do not need hibernation. Maintain warm temperatures year-round ^[5].
  • Nesting: Use a Y-tong (AAC), plaster, or naturalistic nest with narrow chambers that mimic dead twigs. Provide cork, rotting wood, or bamboo tubes as nesting materials ^[5].
• Behavior: Active and fast-moving ants, typical of the genus. Workers are slender and can squeeze through small gaps, so escape prevention matters. They have a sting (like most Pseudomyrmecinae) and will defend their nest if disturbed, but are not considered highly aggressive.
• Common Issues: tropical species struggle if temperatures drop below 22°C, keep warm year-round., dry conditions stress colonies, monitor humidity closely., wild-caught colonies may carry parasites or diseases from their native habitat., queens during founding need peace, avoid disturbing the nest for the first few weeks., escape risk exists despite moderate size, use well‑fitting lids and PTFE/fluon barriers.

Nest Preferences and Housing

In the wild, Pseudomyrmex depressus nests in dead twigs and hollow plant stems ^[5]. This is typical for many Pseudomyrmex species, they are built for narrow, tubular cavities. For captive care, use a Y-tong (AAC) formicarium with narrow chambers, or a naturalistic setup with cork, rotting wood, or bamboo tubes that the ants can colonize. Keep chambers small and snug, these ants feel secure in tight spaces. Avoid overly wet materials, slightly damp is best. Plaster nests with custom-sized channels also work well.

Feeding and Diet

Pseudomyrmex ants are generalist predators and nectar collectors. In captivity, offer a constant supply of sugar water or honey for energy, and small insects (fruit flies, pinhead crickets, mealworms) 2-3 times per week for protein. They likely also collect honeydew from aphids in the wild. Remove uneaten prey after 24 hours to prevent mold.

Temperature and Seasonal Care

As a tropical species, Pseudomyrmex depressus needs warmth year-round. Keep the nest at 24-28°C (75-82°F), this is inferred from its natural habitat. These ants do not require hibernation ^[5]. Use a heating cable on one side of the nest to create a gentle gradient. Place the heating element on top to avoid drying out the substrate. If workers become sluggish or cluster, raise the temperature gradually.

Behavior and Colony Dynamics

Workers are fast, alert, and quick to retreat into their nest when disturbed. They have a sting, like all Pseudomyrmecinae, but are not particularly aggressive. Based on genus patterns, colonies are likely monogyne (single queen) and grow to several hundred workers. The queen probably starts the colony claustrally, sealing herself in the founding chamber. Do not disturb her during this period, she needs peace to raise her first workers.

Humidity and Water Management

These ants come from humid tropical forests. Maintain 70-85% relative humidity in the nest area. Their natural dead‑twig habitats stay moist but not flooded. Use a water reservoir or mist regularly, but provide good ventilation to prevent mold. The substrate should feel damp, never waterlogged. Always have a water test tube with a cotton plug in the outworld.

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References