Polyrhachis stylifera

Quick Summary

• Difficulty: Hard
• Origin & Habitat: Endemic to Cambodia, specifically Kampot Province near the Gulf of Siam ^[1][2]. Natural habitat is undocumented.
• Colony Type: Unconfirmed, only a single worker holotype exists, so nothing is known about queen number or colony structure ^[1].
• Size & Growth:
  • Queen: Unknown, no queen has been described ^[1]
  • Worker: ~5 mm ^[3]
  • Colony: Unknown, only a single specimen has ever been collected ^[1]
  • Growth: Unknown
  • Development: Unknown, no breeding or development data exists (Based on related Polyrhachis species, development may take several months at tropical temperatures.)
• Antkeeping:
  • Temperature: Keep warm, roughly low-to-mid 20s°C based on the tropical climate of Cambodia ^[1]
  • Humidity: Keep nest substrate consistently moist but not waterlogged, based on the tropical climate ^[1]
  • Diapause: Unknown, no data on diapause requirements for this species
  • Nesting: Natural nesting behavior undocumented. Based on Polyrhachis genus patterns, may nest in rotting wood or soil cavities. Use Y-tong or plaster nests with moisture retention.
• Behavior: Based on Polyrhachis genus patterns, likely not aggressive but may bite and spray formic acid defensively, as typical for Formicinae ants. Escape prevention should be moderate due to climbing ability.
• Common Issues: this species is unobtainable in captivity, only a single specimen has ever been collected., no established care guidelines exist due to extreme rarity., temperature and humidity requirements are inferred from climate, not confirmed for this species., diet and founding behavior are completely unknown.

Species Overview and Rarity

Polyrhachis stylifera is one of the rarest ant species, known from only a single specimen collected in Cambodia in the 1930s ^[1]. The holotype worker was collected in Kampot Province, and despite searches, it could not be located in any collection ^[1][2]. This makes it essentially impossible to obtain for captive keeping. The species belongs to the Polyrhachis flavoflagellata group, characterized by reduced lateral petiolar spines and distinctive pubescence ^[2].

Identification and Morphology

The worker has a body length slightly over 5 mm and is mostly black with silvery appressed hairs on the femurs, tibiae, thorax, and petiolus ^[3]. The pronotum has long, pointed spines directed backward, and the petiole has blunt, stump-like lateral projections with blunt tuberculae on the dorsum ^[1][2]. Standing hairs are almost absent, while the gaster has dense, short appressed hairs ^[2].

Related Species and Care Inference

Since no live specimens have been observed, care recommendations are inferred from related Polyrhachis species ^[2]. Polyrhachis ants are tropical and likely require warm, humid conditions. They are Formicinae, so they spray formic acid for defense. For housing, use Y-tong or plaster nests with moisture retention, maintaining temperatures around low-to-mid 20s°C and high humidity.

Availability and Legal Considerations

Polyrhachis stylifera is not available in the antkeeping hobby and is unlikely to become available due to its rarity ^[1][4]. No captive colonies exist. If interested in Polyrhachis, consider more common species like Polyrhachis dives or Polyrhachis muara. Always ensure ants are captive-bred and not wild-caught from protected areas.

Frequently Asked Questions

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References