Dorymyrmex paranensis

Dorymyrmex paranensis

Dorymyrmex paranensis is a small to medium-sized ant belonging to the Dolichoderinae subfamily, commonly known as pyramid ants due to their distinctive pyramid-shaped nest mounds. Workers measure approximately 2.5-4mm and display a yellow to yellow-orange coloration with relatively small compound eyes and a broad head ^[1]. This species was elevated from variety status to full species in 2007 and is found across the Neotropical region, specifically in Argentina, Brazil, and Paraguay ^[1][2]. They inhabit diverse environments including low grasslands, Cerrado savanna, and forested areas, making them adaptable ground-nesting ants ^[3][4].

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Neotropical region, Argentina, Brazil, Paraguay. Found in low grasslands, Cerrado savanna, and forest habitats ^[3][4].
• Colony Type: Unconfirmed colony structure. Based on typical Dorymyrmex genus patterns, likely single-queen colonies.
• Size & Growth:
  • Queen: Estimated 5-7mm based on genus patterns
  • Worker: Estimated 2.5-4mm based on genus patterns
  • Colony: Unknown for this specific species, likely several hundred workers based on related Dorymyrmex species
  • Growth: Moderate, inferred from genus patterns
  • Development: Estimated 6-8 weeks at optimal temperature based on related Dolichoderinae (Development timeline not specifically studied for this species, estimate based on genus-level data)
• Antkeeping:
  • Temperature: Keep at 22-26°C. They naturally occur in subtropical to tropical regions, so warmth supports activity and brood development.
  • Humidity: Moderate humidity around 50-70%. They nest in the ground and tolerate typical household conditions, but substrate should not dry out completely.
  • Diapause: Likely a mild winter slowdown given their subtropical distribution, but specific requirements unconfirmed.
  • Nesting: Ground-nesting species. In captivity, they do well in test tube setups buried in substrate or naturalistic setups with soil. They prefer to nest in soil with some depth.
• Behavior: Dorymyrmex paranensis is a ground-nesting ant that builds characteristic pyramid-shaped nest mounds. They are typically not aggressive and are active foragers. Workers search for honeydew and small insects. Their small size means escape prevention is important, they can slip through small gaps. They are generally peaceful and suitable for beginners.
• Common Issues: escape prevention is important due to their small size, use fine mesh and tight-fitting lids, limited specific research means some care parameters are estimates based on genus patterns, wild-caught colonies may have parasites that affect captive survival, slow founding phase requires patience, queens may take weeks to lay first eggs, substrate drying out can stress colonies since they naturally nest in ground

Housing and Nest Setup

Dorymyrmex paranensis does well in standard antkeeping setups. For founding colonies, a test tube setup works well, place the test tube at an angle so the queen can move between the water reservoir and the dry end. Once the colony reaches 20-30 workers, you can transition to a small formicarium or naturalistic setup with soil substrate. Since they are ground-nesting ants, provide them with several centimeters of substrate they can tunnel through. A naturalistic setup with a soil layer works especially well since it mimics their natural grassland and forest floor nesting sites. Ensure the setup has good escape prevention, these ants are small and can squeeze through tiny gaps, so use fine mesh on any ventilation holes. ^[3][4]

Feeding and Diet

Like most Dorymyrmex species, these ants are omnivorous with a preference for sweet substances. Workers collect honeydew from aphids and scale insects in the wild, along with small insects and other protein sources. In captivity, offer sugar water or honey water as a constant food source. For protein, provide small insects like fruit flies, small mealworms, or cricket pieces. Feed protein 2-3 times per week and ensure sugar water is always available. Remove any uneaten prey after 24-48 hours to prevent mold issues.

Temperature and Heating

Dorymyrmex paranensis originates from subtropical regions of South America, so they prefer warmer conditions. Maintain temperatures between 22-26°C for optimal activity and brood development. Room temperature within this range is often sufficient. If your room is cooler, a heating cable placed on one side of the nest can create a gentle temperature gradient. Avoid temperatures above 30°C as this can stress the colony. They can tolerate brief temperature drops but consistently cool conditions will slow colony growth. ^[3]

Humidity and Water

Keep the nest substrate moderately moist but not waterlogged. The soil should feel damp to the touch but not soggy. These ants naturally inhabit areas with moderate humidity, so aim for around 50-70% relative humidity in the setup. In test tube setups, the water reservoir provides humidity through evaporation. In formicarium setups, mist the substrate occasionally and allow it to partially dry between waterings. Always provide a clean water source, a small test tube with a cotton ball works well. ^[4]

Seasonal Care and Winter Rest

The natural range of Dorymyrmex paranensis includes subtropical areas of Argentina, Brazil, and Paraguay, where winters are mild but noticeable. While specific diapause requirements are not documented for this species, a period of reduced activity during winter months is likely beneficial. During winter, you can lower temperatures to around 15-18°C for 2-3 months. Reduce feeding during this period and avoid disturbing the colony. This rest period supports colony health and may trigger reproductive behavior in spring. ^[1]

Behavior and Temperament

Dorymyrmex paranensis is a relatively peaceful ant species. Workers are active foragers that search for food both on the ground and on low vegetation. The genus name 'pyramid ant' refers to their distinctive nest mounds, which have a pyramid-like structure, though this is more pronounced in some species than others. Workers are not particularly aggressive and do not have a painful sting, making them suitable for beginners. They are diurnal and most active during daylight hours. Colonies establish quickly once the first workers (nanitics) emerge. ^[1]

Frequently Asked Questions

References