Polyrhachis diana

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Philippines (Luzon, Negros Oriental, Mindanao) in tropical forest environments ^[1]
• Colony Type: Unconfirmed, colony structure has not been documented in scientific literature
• Size & Growth:
  • Queen: Unknown, queens have not been described scientifically
  • Worker: 6.35-7.16 mm ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, no development data available
  • Development: Unknown, no direct measurements exist. Based on typical Polyrhachis patterns, expect 6-10 weeks at tropical temperatures ^[3] (This is an estimate from related species, no specific studies exist for P. diana.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. As a tropical species from the Philippines ^[1], they need warm conditions. Use a heating cable to create a gradient.
  • Humidity: Moderate to high humidity (60-80%). Keep nesting material slightly moist but not waterlogged, and provide a water tube]
  • Diapause: No, this tropical species does not require hibernation. Keep temperatures stable year-round]
  • Nesting: Use Y-tong (AAC) or plaster nests with tight chambers. They are ground-nesting, so horizontal setups work well]
• Behavior: Polyrhachis ants are generally calm and not aggressive toward keepers. They are active foragers but not defensive. Escape risk is moderate, ensure secure barriers]. Defense: They lack a functional sting and spray formic acid as a defense mechanism.
• Common Issues: queen and colony structure unconfirmed, you may need to locate a mated queen through nuptial flights or obtain an established colony, no specific diet data exists, start with sugar water and protein sources like mealworms, then observe preferences, tropical species sensitive to temperature drops, keep above 20°C to prevent lethargy or death, sparse scientific data means care is based on genus-level inference, be prepared to adjust based on your colony's behavior, only workers described, if you obtain a queen, her size and behavior may differ from related species

Appearance and Identification

Polyrhachis diana workers are medium-sized at 6.35-7.16 mm ^[1]. They have a black body with dense, silvery pubescence that gives a frosted appearance ^[2]. Pronotal spines are straight and acute, directed forward and outward ^[2]. The petiole is broad with two pairs of spines: longer curved mesial spines and shorter lateral teeth ^[2]. Eyes are convex, especially when viewed from behind, distinguishing them from Polyrhachis latona ^[1]. Queens and males are undescribed.

Natural Distribution

This species is endemic to the Philippines, known from Luzon, Negros Oriental, and Mindanao ^[1]. The type locality is Butuan on Mindanao, collected in December 1907 ^[1]. They inhabit warm, humid tropical forests. In captivity, replicate these conditions with stable warmth and moderate humidity.

Housing and Nesting

Use Y-tong (AAC) or plaster nests with tight chambers for ground-nesting setups ^[3]. Ensure chambers are sized for their 6-7 mm body. A test tube setup works for founding colonies. Connect to an outworld for foraging. Use barrier gel or fluon for escape prevention.

Feeding and Diet

Specific diet data is not available. Offer sugar water or honey for energy, and protein like fruit flies or mealworms ^[3]. Provide fresh water in a tube. Feed every 2-3 days, removing uneaten prey after 24 hours.

Temperature and Humidity

Keep nest area at 24-28°C]. A heating cable creates a gradient. Avoid temperatures below 20°C. Aim for 60-80% humidity, keep nesting material moist but not waterlogged]. Mist the outworld occasionally.

Colony Establishment

Queens may be claustral, sealing themselves until workers emerge ^[3]. Provide a small chamber with moderate humidity and stable warmth. Do not disturb the queen. Once workers arrive, offer food. Growth may be slow due to lack of data.

Frequently Asked Questions

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References