Myrmecina dolichothrix

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Philippines (Mindanao), tropical forest floor habitat, typically found in rotting wood, leaf litter, and under stones in damp shaded areas ^[1]
• Colony Type: Colony structure is unconfirmed for this specific species.
• Size & Growth:
  • Queen: Size data unavailable, not described in the type series ^[1]
  • Worker: 2.6-2.75mm total length ^[1]
  • Colony: Colony size is unknown, likely reaches dozens to a few hundred workers based on typical genus patterns
  • Growth: Growth rate is unconfirmed, estimated moderate based on related species
  • Development: Estimated 6-10 weeks at optimal temperature based on similar tropical Myrmicinae (Development time is unconfirmed for this species. Related tropical Myrmicinae typically develop faster than temperate species due to year-round warm conditions.)
• Antkeeping:
  • Temperature: Keep around 24-28°C, they come from tropical Mindanao where temperatures are warm year-round. A gentle gradient allowing workers to self-regulate is ideal. Room temperature in most homes (22-24°C) may be acceptable, but slightly warmer conditions will likely improve colony activity and growth.
  • Humidity: High humidity is essential, think damp forest floor. Keep the nest substrate consistently moist but not waterlogged. Provide a water source like a cotton ball or small water tube. Mist the outworld occasionally and ensure the nest has good moisture retention.
  • Diapause: No, as a tropical species from Mindanao, they do not require hibernation. Keep temperatures stable year-round without seasonal cooling.
  • Nesting: In nature they nest in rotting wood, leaf litter, and under stones in damp shaded areas. In captivity, a small test tube setup works well for founding colonies. For established colonies, a Y-tong (AAC) nest or small formicarium with tight chambers scaled to their tiny size works best. Avoid large open spaces, these small ants feel safer in compact, snug chambers.
• Behavior: These ants are peaceful and not aggressive. They are foragers that search for small prey and honeydew. Their large eyes suggest they may be more visually oriented than many small ants. They do not pose a danger to keepers, their defense mechanism involves smearing venom rather than stinging. Escape prevention is critical, at 2.6-2.75mm, they can squeeze through the tiniest gaps. Use fine mesh barriers and ensure all openings are sealed.
• Common Issues: escape prevention is critical, their tiny size means they can squeeze through standard barrier setups, high humidity requirements can lead to mold if ventilation is poor, slow growth may cause keepers to overfeed or disturb the colony too often, wild-caught colonies may contain parasites that can decimate the colony in captivity, test tube setups must be properly sized, too large a water reservoir can flood the colony

Housing and Nest Setup

Because Myrmecina dolichothrix workers are only 2.6-2.75mm, housing them requires attention to scale. For a newly caught queen or small colony, a standard test tube setup works well, just ensure the cotton is packed snugly so the tiny workers cannot push past it. The water reservoir should be modest (5-8cm) to prevent flooding. For growing colonies, a Y-tong (AAC) nest or small formicarium with narrow chambers (3-5mm wide) is ideal. These ants prefer tight, snug spaces, avoid large open chambers that can make them feel exposed. The nest material should retain moisture well, plaster or acrylic with a water chamber works better than wooden nests which can dry out. The outworld can be simple, a small plastic container with a secure lid and fine mesh vents. ^[1]

Feeding and Diet

Like most Myrmecina species, M. dolichothrix is likely an omnivore that feeds on small insects, honeydew, and nectar. In captivity, offer small protein sources like fruit flies, pinhead crickets, or small mealworm pieces. Since they are so tiny, prey items should be appropriately sized, even a full mealworm may be too large. Offer a sugar source like honey water or sugar water regularly. Feed small amounts every 2-3 days and remove any uneaten prey after 24 hours to prevent mold. A constant water source is essential.

Temperature and Humidity

Being from tropical Mindanao in the Philippines, these ants need warm, humid conditions. Aim for 24-28°C during the active season. Temperatures below 22°C may slow activity and brood development significantly. A small heating cable on one side of the nest can create a gentle gradient if your room temperature runs cool. Humidity is crucial, keep the nest substrate consistently moist. The substrate should feel damp to the touch but not have standing water. A water tube or cotton ball in the outworld provides drinking water. Good ventilation is important to prevent mold, but avoid placing the nest in direct airflow that would dry it out quickly. ^[1]

Colony Founding and Growth

The founding behavior of Myrmecina dolichothrix has not been directly documented. Based on genus patterns for Myrmicinae, the queen likely seals herself in a small chamber and raises her first workers alone (claustral founding), living off her stored fat reserves until the nanitic (first) workers emerge. However, this is an inference, not a confirmed fact. Expect the first workers (nanitics) to be even smaller than normal workers and potentially slower to develop. Growth rate is unknown but is likely moderate, similar tropical ants typically reach 50-100 workers within the first year under good conditions. Patience is key with small species like this.

Behavior and Temperament

Myrmecina dolichothrix is a peaceful species that poses no threat to keepers. They are not aggressive and do not have a painful sting. Workers are foragers that will search out small prey and sugar sources. Their large, well-developed eyes are unusual for such a small ant species, this may indicate more visual-based foraging behavior than typical. They are likely diurnal (active during the day) based on their tropical forest floor habitat. The main behavioral concern is their tiny size: they are not strong climbers and don't form escape artist chains like some species, but they will readily squeeze through any gap or crack. Excellent escape prevention is non-negotiable. ^[1]

Frequently Asked Questions

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References