Meranoplus siamensis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Central and eastern Thailand, found in dry evergreen and dry dipterocarp forests. Workers nest in soil and move slowly along the ground ^[1][2].
• Colony Type: Unknown, only workers have been collected. The colony structure (single or multiple queens) has not been documented.
• Size & Growth:
  • Queen: Not yet described, this species is known only from workers ^[1].
  • Worker: 2.56-2.82mm ^[1]
  • Colony: Unknown, no colony size data available for this species.
  • Growth: Unknown, no development data exists for this newly described species.
  • Development: Unconfirmed, no development studies exist for this species. (No direct development studies exist for this species. Temperature around 24-28°C likely supports development.)
• Antkeeping:
  • Temperature: Keep around 24-28°C. Thailand experiences warm temperatures year-round, so these ants prefer warmer conditions. A heating cable on one side of the nest creates a suitable gradient.
  • Humidity: Moderate humidity around 50-70%. They come from dry forest habitats, so avoid overly damp conditions. Allow the nest substrate to dry slightly between waterings.
  • Diapause: Likely minimal or no diapause, Thailand's climate is tropical with minimal temperature variation. No formal studies exist.
  • Nesting: Soil-nesting species. In captivity, a test tube setup works well for founding colonies. Once established, a naturalistic setup with soil or a Y-tong/plaster nest provides appropriate conditions. Keep substrate moderately moist but not waterlogged.
• Behavior: Workers are slow-moving and relatively calm. They forage on the ground and likely scavenge for small insects and nectar. Their small size means they can escape through tiny gaps, use fine mesh and tight-fitting lids. They are not known to be aggressive and likely have a mild sting, though their small size makes it negligible to humans.
• Common Issues: newly described species means limited captive breeding data, expect a learning curve, small size makes escape prevention critical, use fine mesh barriers, humidity requirements are not well-documented, start moderate and adjust based on colony health, no queen or colony structure data available, keepers may need to infer from related species, slow-moving workers may have difficulty competing with faster ant species if housed in mixed setups

Housing and Nest Setup

Since this is a soil-nesting species, start founding colonies in a simple test tube setup with a water reservoir. The small worker size (under 3mm) means you should use tight-fitting lids and consider applying Fluon or similar barrier gel to prevent escapes. Once the colony reaches 20-30 workers, you can transition to a naturalistic setup with moist soil or a Y-tong/plaster formicarium. Keep the nest substrate moderately moist, these ants come from dry forests but still need some moisture. Avoid completely drying out the nest. ^[1][2]

Feeding and Diet

Based on typical Meranoplus feeding behavior, these ants are likely omnivorous scavengers that collect small insects, honeydew, and nectar. Offer sugar water or honey as a constant energy source. For protein, provide small prey items like fruit flies, pinhead crickets, or mealworm pieces. Since workers move slowly, place food near foraging areas and give them time to discover it. Remove uneaten prey after 24-48 hours to prevent mold. ^[1]

Temperature and Seasonal Care

Maintain temperatures around 24-28°C, which matches their native Thai habitat. A heating cable placed on part of the nest creates a temperature gradient allowing ants to regulate their own exposure. Since Thailand has a tropical climate with minimal winter, these ants likely do not require a true diapause period. However, slight temperature reductions during winter months may be appropriate if your room temperature drops significantly. Monitor colony activity, if workers become sluggish, warming the nest slightly can help. ^[1]

Behavior and Colony Dynamics

Workers are documented as slow-moving on the ground, which means they are not aggressive foragers and likely prefer scavenging over active hunting. This calm temperament makes them suitable for observation-focused keepers. The colony structure remains unknown since only workers have been collected. Their small size and slow movement make them vulnerable to predation if housed near more aggressive ant species. ^[1]

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