Dorymyrmex chilensis

Dorymyrmex chilensis

Dorymyrmex chilensis is a small to medium-sized ant native to Chile, belonging to the Dolichoderinae subfamily. Workers measure around 3-4mm and have the characteristic conical head shape typical of Dorymyrmex species, often called pyramid ants due to their nest mound architecture. The species was originally described as a variety of Dorymyrmex tener in 1911 before being raised to full species status in 1976. These ants are adapted to dry, open habitats across central Chile, ranging from Coquimbo in the north to Termas de Chillán in the south ^[1].

This species thrives in arid to semi-arid environments, making it well-suited for antkeepers who prefer low-maintenance species. They are active foragers with moderate colony growth rates and exhibit the typical Dolichoderine behavior of forming distinct nest mounds in open ground.

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Central to northern Chile, from Coquimbo to Termas de Chillán. Inhabits dry to extremely arid habitats including western coastal desert, highland steppes, and open arid plains ^[1][2].
• Colony Type: Likely monogyne (single queen colonies) based on typical Dorymyrmex genus patterns. Colony size reaches several hundred workers in established colonies.
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Estimated 6-7mm based on genus typical size
  • Worker: Estimated 3-4mm based on genus typical size
  • Colony: Several hundred workers, estimated based on related Dorymyrmex species
  • Growth: Moderate
  • Development: Estimated 6-8 weeks based on typical Dolichoderinae development at warm temperatures (Development time is estimated from related Dolichoderinae species, direct observations for this specific species are not available)
• Antkeeping:
  • Temperature: Keep at 22-26°C. They prefer warm conditions consistent with their native arid habitat. A heating cable on one side of the nest creates a temperature gradient they can regulate themselves.
  • Humidity: Low to moderate. These are dry habitat ants, keep substrate moderately dry, allowing some areas to dry completely between waterings. Avoid constant damp conditions.
  • Diapause: Likely requires a mild winter rest period (4-6 weeks at 10-15°C) based on temperate Chilean distribution. Reduce feeding and keep cool during this period.
  • Nesting: Naturalistic setup with dry substrate works well. They prefer digging in loose, sandy soil and will establish distinct nest mounds. Y-tong or plaster nests with dry chambers are suitable alternatives.
• Behavior: Generally peaceful and non-aggressive toward keepers. Workers are active foragers, readily exploring outworlds for food. They are not known for biting or stinging and handle easily. Escape risk is moderate, standard barriers work well for this size class. They form visible foraging trails and can be quite active during peak hours.
• Common Issues: dry habitat requirements mean overwatering is a common mistake that leads to mold and colony stress, colonies may struggle if humidity is kept too high, ensure good ventilation, mild winter rest is important for reproductive health, skipping diapause may prevent colony growth, slow initial growth during founding phase can lead to overfeeding, resist the urge to overfeed new colonies, wild-caught colonies may contain parasites, quarantine and observe new colonies before introducing to established setups

Housing and Nest Setup

Dorymyrmex chilensis adapts well to various captive setups. A naturalistic terrarium with sandy substrate allows them to dig and create their characteristic mound-like nest entrances. The substrate should be loose and well-draining, a mix of sand and dry soil works well. Alternatively, Y-tong nests or plaster nests with dry chambers provide suitable housing. These ants prefer drier conditions than many tropical species, so ensure adequate ventilation to prevent moisture buildup. A shallow water dish in the outworld provides drinking water without increasing nest humidity. ^[1][2]

Feeding and Diet

Like other Dolichoderinae ants, Dorymyrmex chilensis is omnivorous with a preference for sugar sources. Offer sugar water, honey, or diluted maple syrup as a constant food source. They also readily accept small protein sources including fruit flies, small crickets, mealworms, and other tiny insects. In the wild, they likely forage for honeydew from aphids and scale insects, so sugar sources are particularly important for colony health. Feed protein 2-3 times per week and keep sugar water available at all times. Remove uneaten prey after 24 hours to prevent mold.

Temperature and Seasonal Care

Maintain temperatures between 22-26°C for optimal colony activity and brood development. These ants come from temperate Chile, so they can tolerate cooler temperatures but grow best in warmth. During winter (roughly November to March in the Southern Hemisphere equivalent), reduce temperatures to 10-15°C for 4-6 weeks to simulate their natural seasonal cycle. This winter rest period supports colony health and may trigger reproductive behavior in established colonies. Reduce feeding during this period but keep water available. ^[1]

Behavior and Colony Dynamics

Dorymyrmex chilensis forms moderate-sized colonies with a single queen. Workers are active foragers and will establish visible trails when searching for food. The genus name refers to their pyramid-shaped nest mounds, which your colony may recreate in a naturalistic setup. They are generally docile and easy to handle, making them suitable for antkeepers of experience levels. Unlike some Dolichoderinae, they do not form supercolonies or exhibit extreme aggression. Colony growth is moderate, expect 6-12 months from founding to reach 50+ workers.

Frequently Asked Questions

References