Myrmelachista brevicornis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to the Neotropical region, specifically Brazil (Santarem) and Peru. They inhabit tropical forest environments where they nest in arboreal locations like hollow twigs and branches ^[1][2].
• Colony Type: Colony structure is unconfirmed. Based on typical Myrmelachista patterns, they likely form small colonies with single queens, but this has not been directly documented for this species.
• Size & Growth:
  • Queen: Size data unavailable, no queen description has been published.
  • Worker: 1.2mm ^[2]
  • Colony: Unknown, no documented colony size for this species.
  • Growth: Unknown, not studied
  • Development: Unknown, no specific development data exists for this species. (Development timeline has not been documented.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. As a tropical species, they need warm conditions year-round.
  • Humidity: High humidity (70-85%), mimic the damp tropical forest understory where they naturally occur. Keep nesting material consistently moist but not waterlogged.
  • Diapause: No, as a tropical species, they do not require hibernation. Maintain consistent warm temperatures year-round.
  • Nesting: Arboreal nesting preferences. In captivity, they do well in small test tubes or Y-tong setups with narrow chambers scaled to their tiny size. Provide twigs or small channels they can use as nesting spaces.
• Behavior: These are tiny, fast-moving arboreal ants. They are likely active foragers that search for honeydew and small prey. Their small size makes them excellent escape artists, escape prevention must be excellent with fine mesh barriers and tight-fitting lids. They are probably non-aggressive and may flee rather than fight when disturbed. Their nine antennal segments suggest they may have reduced sensory capabilities compared to other ants.
• Common Issues: escape prevention is critical due to their very small size, they can squeeze through standard mesh, humidity control is challenging, too dry causes dehydration, too wet causes mold, tropical temperature requirements mean they cannot tolerate cool rooms, slow colony growth can frustrate beginners who overfeed and cause mold, wild-caught colonies may have parasites or diseases that kill them in captivity

Housing and Nest Setup

Myrmelachista brevicornis is an arboreal species that naturally nests in hollow twigs and branches in tropical forests. In captivity, they do well in small test tubes with cotton stoppers or Y-tong nests scaled to their tiny size. The key is providing appropriately sized passages, chambers that are too large can stress these small ants. A test tube setup works well for founding colonies, while established colonies can be moved to small plaster or Y-tong nests. Always ensure excellent escape prevention, these tiny ants can squeeze through gaps that would hold back larger species. Use fine mesh on any ventilation holes and check all seams regularly. ^[2]

Feeding and Diet

Based on typical Myrmelachista genus behavior, these ants likely feed primarily on honeydew collected from aphids and scale insects, plus small insects and other protein sources. In captivity, offer sugar water or honey water as a constant energy source. For protein, provide small live prey like fruit flies, pinhead crickets, or mealworms cut into tiny pieces. Because of their small size, prey items should be appropriately sized, anything larger than their head is likely ignored. Feed protein every 2-3 days and remove any uneaten prey within 24 hours to prevent mold. ^[2]

Temperature and Humidity

As a tropical species from Brazil and Peru, Myrmelachista brevicornis requires warm, humid conditions. Maintain temperatures between 24-28°C year-round, they do not tolerate cool conditions and have no diapause requirement. A heating cable on one side of the nest can create a temperature gradient, allowing the ants to self-regulate. Humidity should be kept high at 70-85%. If using a test tube setup, ensure the water reservoir is adequate but not excessive to prevent flooding. Mist the outworld occasionally and monitor for condensation. Avoid placing the nest near air conditioning vents or in rooms with temperature fluctuations. ^[2]

Colony Growth and Development

The specific development timeline of Myrmelachista brevicornis has not been documented. Colony growth will likely be slow initially, these are small ants. Be patient during the founding phase, queens may take several weeks to lay their first eggs. Do not disturb the nest during this critical period. ^[2]

Handling and Observation

These tiny ants are fast-moving and can be challenging to observe closely. They are likely non-aggressive and will flee rather than engage if threatened. Their small size means they are fragile, avoid handling them directly and use gentle techniques if colony transfers are necessary. When observing, use good lighting and consider a magnifying glass to appreciate their distinctive coloring (yellowish-red body with black gaster). Their nine antennal segments are unusual and can be observed under magnification. Keep escape prevention in mind during any outworld feeding or nest maintenance. ^[2]

Frequently Asked Questions

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References