Pheidole dolon

Pheidole dolon

Pheidole dolon is a tiny rainforest ant native to the Amazon basin and surrounding regions of South America. Workers are dark brown to nearly black with yellowish legs, measuring just 0.82mm in head width. This species belongs to the distorta group and is known for its remarkably long propodeal spines, dagger-like extensions that give it the species name 'dolon' (Greek for dagger). Only the minor worker caste has been described, as soldiers have not been documented in available specimens. These ants live in lowland tropical rainforests up to 450 meters elevation, where they forages in leaf litter and on the forest floor^[1].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Found across the Amazon basin in Bolivia, Brazil, Colombia, French Guiana, and Peru. Inhabits lowland tropical rainforest environments up to 450m elevation, typically collected from leaf litter in both liana forest and transition forest areas^[2][3].
• Colony Type: Colony structure is unconfirmed. Based on typical Pheidole genus patterns, likely single-queen colonies, though this has not been directly documented for this species.
• Size & Growth:
  • Queen: Unknown, not yet described in scientific literature
  • Worker: Minor workers: HW 0.82mm, HL 0.82mm, SL 0.80mm
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, no development studies exist
  • Development: Unknown, no direct measurements available. Based on typical tropical Pheidole species, estimate 4-8 weeks at optimal temperature. (No specific development data exists for this species. Related tropical Pheidole species typically develop from egg to worker in 4-8 weeks under warm, humid conditions.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. As a tropical rainforest species from the Amazon, they require warm, stable temperatures. A heating cable on one side of the nest creates a gradient allowing workers to self-regulate
  • Humidity: High humidity required, aim for 70-85%. These leaf-litter ants from tropical rainforest need consistently moist substrate. Keep the nest substrate damp but not waterlogged, with some drier areas available for escape.
  • Diapause: No, as a tropical species from lowland Amazon rainforest, they do not require hibernation. Maintain warm conditions year-round.
  • Nesting: Y-tong (AAC) nests or plaster nests work well for these tiny ants. The tight chambers and passages of a Y-tong nest help accommodate their small size. Provide a moisture reservoir to maintain humidity. A naturalistic setup with moist soil and hiding spots also works.
• Behavior: Active foragers that search through leaf litter and upper soil layers. Minor workers are small but persistent, likely recruiting nestmates to food discoveries through chemical trails. No documented sting, Pheidole ants have stingers but most species are too small to penetrate human skin meaningfully. Their tiny size means escape prevention is critical, they can squeeze through remarkably small gaps.
• Common Issues: escape prevention is critical due to their very small size, use fine mesh and tight-fitting lids, high humidity requirements can lead to mold if ventilation is inadequate, lack of documented colony data means keepers are working with estimates, monitor colony response closely, tropical species may struggle if temperatures drop below 22°C, no soldier caste documented, this may affect how they handle larger prey items

Housing and Nest Setup

Pheidole dolon is a tiny leaf-litter ant that requires careful housing due to its small size. Y-tong (AAC) nests work exceptionally well because the tight chambers and narrow passages match their diminutive dimensions. Plaster nests with a water reservoir are also suitable, as they help maintain the high humidity these tropical ants need. For the outworld, use a simple container with smooth walls to prevent escapes, these ants are excellent climbers despite their small size. Escape prevention is critical: apply Fluon or similar barrier to the rim, use fine mesh on any ventilation holes, and ensure all lid connections are tight. A small water test tube connected to the nest provides drinking water and helps maintain humidity.

Feeding and Diet

In their natural habitat, Pheidole species are generalist foragers that collect small insects, honeydew, and various organic matter from the leaf litter layer. For captive care, offer small protein sources such as fruit flies, tiny crickets, mealworm pieces, and other small insects. Sugar sources are typically accepted, offer honey water or sugar water on a regular basis, though protein should form the primary diet. Feed small amounts 2-3 times per week, removing any uneaten food after 24 hours to prevent mold. Because only the minor worker caste is known, they may struggle with larger prey items, cut crickets into small pieces or offer pre-killed insects.

Temperature and Humidity Management

As a tropical rainforest species from the Amazon basin, Pheidole dolon requires warm and humid conditions. Maintain temperatures between 24-28°C year-round, they do not tolerate cool conditions well. A heating cable placed on top of the nest (never underneath where it can dry out the substrate) creates a gentle temperature gradient. Humidity should stay high at 70-85%, check the substrate regularly and rehydrate when the surface begins drying. A moisture reservoir in the nest setup helps maintain stable humidity. Avoid placing the colony near air conditioning vents or in rooms with temperature fluctuations. Unlike temperate species, these ants do not require any winter cooling period.

Colony Development and Expectations

Because Pheidole dolon has not been extensively studied in captivity, keepers should expect some uncertainty in colony development. The genus Pheidole is known for producing major workers (soldiers) in established colonies, but this species has only been documented in the minor caste so far, it's unclear whether majors will develop in captivity. Growth rate is estimated based on related tropical species at 4-8 weeks from egg to first worker. Colonies likely remain small compared to some Pheidole species, possibly under 500 workers at maturity. Be patient during the founding phase, claustral queens (if confirmed) seal themselves in and may take weeks before the first workers emerge. Monitor the colony closely and adjust conditions based on worker activity levels.

Frequently Asked Questions

References