Adelomyrmex metzabok

Adelomyrmex metzabok

Adelomyrmex metzabok is a tiny, dark brown to black ant native to the wet forests of southern Mexico and Guatemala. Workers measure just 0.58-0.63mm, making them one of the smaller ant species kept in captivity. The genus Adelomyrmex belongs to the Solenopsidini tribe and is known for their distinctive morphology, including a strongly produced promesonotum that slopes upward and drops abruptly to the propodeum, and propodeal spines. These ants inhabit leaf litter in mature and second-growth wet forests at elevations from sea level to just below 1000m. They can be locally abundant, appearing in up to 26% of leaf litter samples in suitable habitat. Queens are occasionally found together with workers in samples, suggesting they may remain in the nest after colony establishment ^[1].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Eastern lowlands of Chiapas, Mexico and eastern Petén region of Guatemala. Found in mature and second-growth wet forest habitats from sea level to just below 1000m elevation ^[1][2].
• Colony Type: Colony structure is not well documented. Queens have been found together with workers in Winkler samples, which could indicate either polygyny or that queens remain in the colony after founding. Further research is needed to confirm colony type ^[1].
• Size & Growth:
  • Queen: Not specifically measured in available literature, estimated based on worker size to be around 3-4mm. Signal if estimated.
  • Worker: 0.58-0.63mm ^[1].
  • Colony: Unknown, no colony size data available in literature. Based on similar litter ants, likely under 100 workers.
  • Growth: Moderate, likely slow due to tiny colony size and small worker size. Signal if estimated.
  • Development: 6-10 weeks, estimated based on typical Myrmicinae development at tropical temperatures. Signal if estimated. (Development time is unconfirmed for this species. Estimates based on related genera in the Solenopsidini tribe.)
• Antkeeping:
  • Temperature: Keep at 24-26°C, these are lowland tropical ants from warm, humid forests. A gentle gradient allowing them to self-regulate is ideal. Room temperature in most homes should work well, but a heating cable on one side of the nest can help maintain warmth if needed.
  • Humidity: High humidity is essential, they come from wet forest leaf litter. Keep the nest substrate consistently moist but not waterlogged. The substrate should feel damp to the touch with some condensation visible. A water reservoir connected to the nest helps maintain humidity.
  • Diapause: Unknown, these are tropical ants from low elevations where seasonal temperature changes are minimal. They likely do not require a formal diapause period, but may slow down slightly during cooler months.
  • Nesting: In nature they live in sifted leaf litter and rotting wood. In captivity, a small test tube setup or Y-tong nest with fine chambers works well. The tiny worker size means chambers should be small and tight-fitting. Provide moist substrate like soil or plaster that holds humidity well. Avoid large, open spaces.
• Behavior: These are very small, cryptic ants that live in leaf litter. They are not aggressive and likely forage individually or in small groups for tiny prey. Workers have small eyes with only 6-9 ommatidia, reflecting their subterranean lifestyle. Escape prevention is critical due to their tiny size, they can squeeze through the smallest gaps. They are not known to sting and present no danger to keepers ^[1].
• Common Issues: escape prevention is critical, their tiny 0.6mm size means they can squeeze through gaps that seem sealed. Use fine mesh and check for any tiny gaps., high humidity requirements can lead to mold problems if ventilation is poor. Balance humidity with adequate airflow., slow growth and tiny colony size mean colonies are vulnerable, a few workers dying can significantly impact the colony., difficulty finding appropriate prey, their small size requires micro-prey like springtails, which may be harder to culture than standard feeder insects., wild-caught colonies may be stressed from collection and transport, making them prone to colony failure in captivity.

Housing and Nest Setup

Because Adelomyrmex metzabok workers are only 0.58-0.63mm, housing them requires attention to scale. A small test tube setup works well for founding colonies, use a test tube with a cotton plug and small water reservoir. For established colonies, a Y-tong (acrylic) nest with tiny chambers or a small plaster nest works better than larger formicarium setups. The chambers should be tight and appropriately sized for their tiny bodies. Avoid large, open spaces that can stress these small ants. The nest material should hold moisture well, plaster, soil-filled test tubes, or acrylic nests with water reservoirs all work. Place the nest in a dark area as these leaf litter ants prefer dim conditions. ^[1][2]

Feeding and Diet

In the wild, these ants are found in sifted leaf litter and likely feed on tiny arthropods and honeydew. In captivity, offer small live prey appropriate to their size, springtails are ideal, as are other micro-arthropods. You can also try small pieces of insects like fruit flies or tiny cricket parts. Sugar sources may be accepted, a small drop of sugar water or honey can be offered, but these tiny ants may not readily take liquid sugars. Observe what they accept and adjust accordingly. Feed small amounts every few days, removing any uneaten prey to prevent mold. ^[2]

Temperature and Humidity

These are lowland tropical ants from wet forests in Mexico and Guatemala. Keep them warm at 24-26°C, which is typical room temperature in many homes. If your home is cooler, a small heating cable on one side of the nest can provide warmth, place it on top of the nest to warm the area gently. Humidity is critical, they come from wet forest leaf litter where conditions are constantly damp. Keep the nest substrate consistently moist but not sitting in water. A water reservoir connected to the nest helps maintain humidity over time. Mist the outworld occasionally but focus on maintaining consistent moisture in the nest area. Good ventilation is important to prevent mold while maintaining humidity. ^[1]

Handling and Colony Care

This species is not aggressive and presents no danger to keepers, their tiny size means they cannot sting effectively. However, their small size makes them challenging to handle and observe. Escape prevention is the biggest concern, these ants can squeeze through gaps that seem impossibly small. Use fine mesh on any ventilation holes, check lids regularly for gaps, and consider using barrier substances like fluon on the rim of the nest. Colony growth will be slow, these are tiny ants with small colony sizes. Be patient and avoid disturbing the colony unnecessarily. Queens have been found with workers in the wild, which may indicate they remain in the colony after founding, but more research is needed on their social structure ^[1].

Finding and Acquiring Colonies

Adelomyrmex metzabok is not commonly kept in the antkeeping hobby, and colonies are rarely available from suppliers. If you want to start a colony, you would need to locate a wild colony in their natural range (southern Mexico or Guatemala) during the right season and collect carefully. This requires permits for collecting in protected areas. The more practical approach is to connect with antkeeping communities or researchers working with Central American ants. Given their small size and specific habitat requirements, this species is best suited for experienced antkeepers who can provide the precise conditions they need. Consider starting with more commonly available species if you are new to antkeeping.

Frequently Asked Questions

References