Polyrhachis decemdentata

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Afrotropical region, found in Cameroon, Congo, Democratic Republic of Congo, Equatorial Guinea, Gabon, Ghana, Guinea, Ivory Coast, Nigeria, Sierra Leone, and Uganda. They are arboreal ants that nest in rotting wood of standing trees, often high above ground ^[1].
• Colony Type: Colony structure is not well-documented in scientific literature. Based on related Polyrhachis species, likely monogyne (single queen) but this requires confirmation. The species is arboreal and builds nests using silk and pupal cocoons ^[4].
• Size & Growth:
  • Queen: Size data unavailable, no total length measurements in context
  • Worker: 4.7-6.7 mm ^[1]
  • Colony: Up to over 1000 workers based on field abundance data from cocoa farms ^[2]
  • Growth: Moderate, inferred from typical Polyrhachis patterns
  • Development: Estimated 8-12 weeks at tropical temperatures, inferred from related species ^[4] (Development time is inferred, specific data for this species is not available)
• Antkeeping:
  • Temperature: Keep at 24-28°C. This tropical species thrives in warm conditions ^[1].
  • Humidity: Keep the nest substrate consistently moist but not waterlogged ^[1].
  • Diapause: No, this is a tropical species that does not require hibernation ^[1].
  • Nesting: Arboreal nesting is essential. Provide a nest that mimics rotting wood, such as Y-tong or plaster, with vertical orientation ^[4][1].
• Behavior: Workers are moderately active foragers, subordinate to aggressive species like Oecophylla and Crematogaster, and avoid conflict. They are not aggressive toward keepers and have moderate escape risk due to their agility ^[2][3][5].
• Common Issues: arboreal nature requires vertical space and wood-like nesting material to prevent stress, humidity control is critical, too dry causes decline, too wet causes mold, colonies may struggle if kept near dominant ant species, isolate them, slow founding phase, new colonies take time to establish, wild-caught colonies may carry parasites or be stressed, leading to failure

Natural History and Distribution

Polyrhachis decemdentata is widely distributed across West and Central Africa, from Sierra Leone east to Uganda and south through the Congo region to Gabon. They are strictly arboreal ants, almost never descending to ground level. Nests are constructed in rotten parts of standing trees, often considerable distances above the ground, preferring branches previously attacked by termites. Alate females have been recorded in Ghana in October, Nigeria in March, July, and August, Sierra Leone in August, and Uganda in August and December ^[1]. This species is tolerant of dominant ant species like Oecophylla longinoda, nesting in trees where they are present but avoiding direct competition ^[1][5].

Housing and Nest Setup

Because Polyrhachis decemdentata is arboreal, your setup should prioritize vertical space and nesting material that mimics rotting wood. Use a Y-tong or plaster nest with chambers sized for 4.7-6.7 mm workers. Include vertical orientation and climbing structures in the outworld, such as twigs or cork. Test tube setups are not recommended long-term, they prefer enclosed wood-based nests. Ensure good humidity retention with ventilation to prevent mold ^[4][1].

Feeding and Diet

Polyrhachis decemdentata is omnivorous, feeding on honeydew, nectar, and small insects in the wild. In captivity, offer sugar water or honey as a constant energy source, and protein like small crickets or mealworms twice weekly. Remove uneaten prey after 24-48 hours to prevent mold. As a subordinate species, they may be cautious foragers, so ensure food is accessible ^[2][3].

Temperature and Humidity Requirements

As a tropical African species, Polyrhachis decemdentata requires warm and humid conditions. Keep the nest area at 24-28°C, using a heating cable if needed, but provide a temperature gradient. Humidity should be high, with the nest substrate consistently moist but not waterlogged. Mist the outworld regularly to maintain conditions ^[1].

Behavior and Colony Dynamics

Polyrhachis decemdentata is a subordinate species in ant communities, avoiding conflict with more dominant ants like Oecophylla longinoda and Crematogaster striatula at food baits. They can be numerically abundant in suitable habitats, with studies recording them on over 30% of sampled trees. Workers are active foragers, not aggressive toward keepers, and use silk in nest construction ^[4][5][2].

Frequently Asked Questions

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References