Solenopsis clytemnestra

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Neotropical region, Argentina, Bolivia, Brazil, and Paraguay. Found in wet subtropical forest at 750-900 m elevation in Tucumán, Argentina, and in a variety of habitats: shaded lawns, pastures, humid subtropical forests, and campo cerrado in Paraguay. In Bolivia, they occur in yungas forest, montane evergreen forest, and cloud forest ^[1][2][3].
• Colony Type: Unconfirmed, based on related Solenopsis species, likely monogyne (single queen) ^[1].
• Size & Growth:
  • Queen: 4.68 mm ^[1][2]
  • Worker: 1.56-2.01 mm ^[1][2]
  • Colony: Unknown, related Solenopsis species can reach several hundred to a few thousand workers ^[4].
  • Growth: Moderate, typical for small Myrmicinae
  • Development: 6-8 weeks (estimated from related Solenopsis species) (Specific development data for this species is not available.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. As a Neotropical species from subtropical regions, they prefer stable warmth. A heating cable on one side of the nest creates a useful gradient. Avoid temperatures below 20°C ^[1].
  • Humidity: Moderate to high. In nature, they live in humid leaf litter and soil. Keep the nest substrate consistently moist but not waterlogged, and provide a moisture gradient so ants can choose their preferred area ^[1][2].
  • Diapause: No, this Neotropical species does not require hibernation. Keep warm temperatures year-round ^[1].
  • Nesting: In the wild they nest in twigs, rotting wood, and leaf litter ^[1][2]. For captivity, use a naturalistic setup with moist soil substrate, or a plaster or Y‑tong (AAC) nest with small chambers. Because workers are tiny, make sure all nest entrances are tight. Avoid acrylic nests, which lack the right moisture properties.
• Behavior: Thief ants are named for their habit of raiding other ant colonies for brood and food. Workers are small but aggressive, and they will mass‑recruit to defend resources. They have a functional stinger that can deliver a noticeable pinch. Escape prevention is critical, workers can fit through gaps smaller than 1 mm, so use fine mesh (≤0.5 mm) and seal all connections. They are mainly nocturnal but will forage anytime food is available ^[1][2][4].
• Common Issues: escape prevention is critical, 1.5-2 mm workers squeeze through tiny gaps, use fine mesh and tight seals, aggressive toward other ant colonies, keep them separate from other species, small size makes handling and colony transfers tricky, soil nests need constant moisture but also good ventilation to prevent mold, unknown colony structure, do not assume polygyny without evidence

Housing and Nest Setup

Solenopsis clytemnestra is a soil‑dwelling ant that naturally nests in twigs, rotting wood, and leaf litter in humid forests ^[1][2]. For captivity, a naturalistic setup with moist soil works best, mix potting soil with sand and keep it damp but not waterlogged. Alternatively, use a plaster or Y‑tong (AAC) nest with narrow chambers scaled to their tiny size. Do not use acrylic nests, as they lack the right moisture retention. Because workers are only 1.56-2.01 mm, escape prevention must be excellent: seal all connections with fine mesh (0.5 mm or smaller) and use fluon or a water moat around the outworld. Keep the nest dark and provide a cover ^[1].

Feeding and Diet

As thief ants, Solenopsis clytemnestra are omnivores that exploit a wide range of food. In the wild they raid other ant colonies for brood and food, and they tend aphids for honeydew ^[4]. In captivity, offer sugar water or honey as a steady energy source, and protein from small insects like fruit flies, pinhead crickets, or mealworms. They recruit heavily to sweet liquids. Feed protein 2-3 times per week and keep sugar water available constantly. Remove leftovers after 24-48 hours to avoid mold. Their small size means even tiny prey is suitable ^[4][1].

Temperature and Seasonal Care

This Neotropical species needs warm conditions year‑round. Keep the nest at 24-28°C with a slight gradient so workers can choose their preferred spot ^[1]. Use a heating cable on one side, but avoid drying out the substrate. Do not hibernate them, they have no diapause requirement. Sudden temperature drops can stress the colony. Room temperature in a heated home is usually fine, but use a thermometer to check ^[1][2].

Colony Development and Growth

Queens are 4.68 mm long ^[1][2]. Their founding behavior is unknown, there is no data on whether they are claustral, semi‑claustral, or parasitic in the wild. Keepers should assume a typical founding period without disturbing the queen. Based on related Solenopsis species, the first workers (nanitics) may appear 6-8 weeks after the eggs are laid, but this is an estimate. Colony growth is moderate and mature colonies likely reach several hundred to a few thousand workers ^[4].

Behavior and Defense

Solenopsis clytemnestra behaves like other thief ants: it is aggressive, territorial, and raids the colonies of other ants ^[4]. Workers mass‑recruit to food and will defend their nest with a sting (typical of Myrmicinae). Although small, their sting is noticeable. They forage mainly at night but can be active any time. The biggest risk is escape, workers can fit through gaps as small as 0.5 mm, so excellent barrier protection is mandatory. Check all seals regularly ^[1].

Frequently Asked Questions

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References