Solenopsis latastei

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Central Chile (Huasco to Valdivia) and Argentina’s Entre Ríos province. Found in Mediterranean climate zones, typically nesting under rocks in disturbed and urban areas ^[2][3].
• Colony Type: Unconfirmed. Based on related Solenopsis species, colonies are likely single-queen (monogyne), but no specific data exists.
• Size & Growth:
  • Queen: 4.32-6.00 mm ^[1]
  • Worker: 1.68-2.18 mm ^[1]
  • Colony: Unknown, thief ant colonies are typically moderate, but no specific data for this species
  • Growth: Moderate
  • Development: Estimated 6-8 weeks based on related Solenopsis species (Timeline not directly studied, large queens suggest substantial founding reserves.)
• Antkeeping:
  • Temperature: Keep at room temperature, around 20-24 °C. No specific studies exist, this range matches the Mediterranean climate of its native range in central Chile ^[2].
  • Humidity: Moderate humidity preferred. Provide a moisture gradient so ants can self-regulate, natural habitat is relatively dry in summer ^[2].
  • Diapause: Unconfirmed. Central Chile has mild winters, reduce feeding if activity drops in winter, but no forced dormancy is known.
  • Nesting: Natural nesting is under rocks or in soil ^[2]. In captivity, test tubes work for founding. Use a shallow foraging area, these tiny ants prefer tight, dark spaces.
• Behavior: Thief ants are secretive and not aggressive. Workers are tiny (under 2.2 mm) and flee rather than fight. They have a functional sting (typical of Myrmicinae, tribe Solenopsidini) but it is mild and seldom used on humans. Escape risk is high due to size, use fine mesh. Foraging is likely nocturnal or crepuscular.
• Common Issues: tiny workers can escape through very small gaps, use fine mesh (, secretive nature makes colony activity hard to observe, thief ant behavior may lead them to infiltrate other ant nests if kept together, limited research means many care details are estimated from related species, urban tolerance may vary, some colonies might be stressed by captive conditions

Housing and Nest Setup

Because Solenopsis latastei workers are only 1.68-2.18 mm, escape prevention is critical. Start a colony in a standard test tube with a cotton water reservoir, this mimics their natural nesting under rocks. Workers can slip through gaps barely visible to the naked eye, so seal all connections and use fine mesh (≤ 0.5 mm) on any ventilation. Foraging areas should be shallow and enclosed, avoid large open spaces. Keep the nest dark and undisturbed, especially during founding ^[1].

Feeding and Diet

Thief ants are generalist scavengers. In captivity, offer small protein sources like fruit flies, pinhead crickets, or tiny mealworm pieces, plus sugar water or honey. Feed small amounts twice a week and remove leftovers after 24 hours to prevent mold. They are not granivorous. Their tiny size means even small prey is substantial ^[1].

Temperature and Seasonal Care

Keep the colony at room temperature (20-24 °C). This matches the Mediterranean climate of central Chile. No specific diapause requirement is documented, reduce feeding if winter activity drops, but do not force dormancy. Avoid placing the nest near heat sources ^[2].

Behavior and Colony Dynamics

Solenopsis latastei is a thief ant that steals food and brood from other colonies through lestobiosis ^[2]. Workers are shy and flee rather than attack. They have a sting (like other Solenopsidini), but it is mild. The species can persist even in areas invaded by Argentine ants (Linepithema humile), suggesting some competitive edge ^[4].

Frequently Asked Questions

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References