Platythyrea strenua

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Endemic to Hispaniola, found only in Haiti (type locality at Diquini) and the Dominican Republic (Sierra de Baoruco). They live in high-elevation pine forests (Pinus occidentalis) at 1,200-1,500m altitude, nesting under limestone slabs and in rotting wood near termite colonies ^[2][3].
• Colony Type: Based on typical Platythyrea patterns, likely single-queen colonies.
• Size & Growth:
  • Queen: Inferred from Platythyrea genus (~10-12mm)
  • Worker: 8-8.5mm ^[1]
  • Colony: Up to 500 workers ^[2]
  • Growth: Moderate, inferred from typical Ponerinae development patterns.
  • Development: Specific data unavailable. Based on related ponerines, may take 6-10 weeks at optimal temperature. (Development time is estimated from related species.)
• Antkeeping:
  • Temperature: Keep cool, roughly 18-22°C, based on high-elevation origin ^[2][3].
  • Humidity: Keep nest substrate consistently moist but not waterlogged, as they nest in damp microhabitats ^[2][3].
  • Diapause: Based on high-elevation origin, a winter rest period is likely beneficial. Reduce temperatures to 15-18°C for 2-3 months during winter.
  • Nesting: Prefers damp, dark nesting sites under slabs or in wood. In captivity, use moist substrate or Y-tong nests with moisture chambers ^[2][3].
• Behavior: Platythyrea strenua is a predatory ponerine ant with moderate activity levels. Workers forage on the ground surface and accept small live prey. They have a functional stinger and may sting if provoked ^[1]. Escape risk is moderate due to their size, standard barrier methods work well.
• Common Issues: high-elevation origins mean they are sensitive to overheating, keep them cool, small colony sizes in the wild suggest colonies may be slow to establish and vulnerable during founding, damp nesting conditions can lead to mold if ventilation is poor, their rarity means wild-caught colonies may have limited genetic diversity, they may be difficult to find as they are not common in the antkeeping trade

Natural History and Distribution

Platythyrea strenua is one of the rarest ant species in the Caribbean, known only from the island of Hispaniola. The original type collection was made in Diquini, Haiti in 1912-1913 from a rotten log situated near a termite colony. After this initial discovery, the species was not recorded again until 1975 when two separate colonies were found in the Sierra de Baoruco mountains of the Dominican Republic at elevations between 1,200-1,500 meters ^[2][3].

These high-elevation pine forest habitats are notably cooler than lowland tropical areas. The colonies were found nesting under limestone slabs in areas where Pinus occidentalis (Hispaniolan pine) dominates, with Gnaphalium and related plants in the understory. This suggests P. strenua is a cool-adapted species that prefers damp, shaded microhabitats typical of mountain forests ^[2][3].

Housing and Nest Setup

For keeping Platythyrea strenua successfully, replicate their natural cool, damp habitat. A naturalistic setup with a soil/peat substrate mixture works well, keep it consistently moist but not waterlogged. A Y-tong nest with moisture chambers is also suitable, as it allows you to maintain humidity while still being able to observe the colony.

Given their high-elevation origins, avoid overheating. Room temperature (18-22°C) is ideal, they will struggle if kept above 25°C. Place the nest in a cool, dark location away from direct sunlight and heat sources. Provide a temperature gradient so workers can choose their preferred zone. Because they are ground-nesting ants, keep the nesting area dark and minimize disturbances during the founding stage ^[2][3].

Feeding and Diet

As a member of the Ponerinae subfamily, Platythyrea strenua is likely a predatory ant that hunts small invertebrates. In captivity, offer small live prey such as fruit flies, pinhead crickets, mealworms, and other appropriately-sized insects. Feed protein prey 2-3 times per week, removing any uneaten prey after 24 hours.

Sugar sources may be accepted, you can offer a drop of honey or sugar water occasionally, though ponerines are typically less interested in sweets than formicines. Always provide fresh water. Since colonies in the wild were found near termite colonies, they may have a particular affinity for termite prey, this could be an interesting food to experiment with if available ^[1].

Temperature and Seasonal Care

Temperature management is the most critical factor for keeping this species healthy. Their native habitat at 1,200-1,500m elevation means they are adapted to cooler conditions than most tropical ants. Keep the nest area between 18-22°C year-round. During winter months in the Northern Hemisphere (roughly November through February), expect natural slowing of activity and reduce temperatures slightly to 15-18°C.

This winter rest period likely mimics their natural cycle in the Dominican highlands, where cooler temperatures prevail during the dry season. Do not attempt to maintain active growth year-round, allow the colony to rest. Overheating is the primary killer of this species in captivity, so monitor temperatures carefully and provide ventilation to prevent heat buildup ^[2][3].

Colony Establishment and Growth

P. strenua colonies appear to be small in the wild, field collectors noted 'small colonies' rather than the large supercolonies seen in some ant species. This means you should expect slower growth than species like Camponotus or Formica. A founding queen will likely take 6-10 weeks to produce her first workers (nanitics), and the colony may remain under 100 workers for the first year.

Be patient during the founding stage. Provide the queen with a dark, humid test tube setup and do not disturb her. Once workers emerge, growth should be steady but modest. The key to success is providing stable, cool conditions and consistent (but not excessive) feeding. Small colony size also means each individual is valuable, avoid excessive disturbances that could stress the colony ^[2][3].

Frequently Asked Questions

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References