Onychomyrmex doddi

Quick Summary

• Difficulty: Hard
• Origin & Habitat: Queensland, Australia, damp, shady rainforest ^[1]
• Colony Type: Colonies have ergatoid (wingless) queens. Based on POA clade membership, colonies may have nomadic tendencies ^[2][1].
• Size & Growth:
  • Queen: Nearly 4 mm ^[1]
  • Worker: 2-2.5 mm ^[1]
  • Colony: Up to 50 workers ^[1]
  • Growth: Unknown
  • Development: Unknown, no direct data available. (Development timeline unconfirmed for this species.)
• Antkeeping:
  • Temperature: Keep warm and stable, roughly 22-26°C, based on their tropical habitat ^[1].
  • Humidity: Keep nest substrate consistently moist but not waterlogged, as they inhabit damp areas ^[1].
  • Diapause: Unknown, being tropical, likely no diapause, but unconfirmed.
  • Nesting: Natural nesting in small logs in damp, shady areas ^[1]. In captivity, test tube setups or Y-tong nests with high humidity are suitable.
• Behavior: Predatory, using stingers to subdue prey. Nomadic colony behavior likely ^[2]. Escape risk is moderate due to small size, use standard barriers.
• Common Issues: nomadic behavior may stress colonies if they cannot move, provide space for relocation., high humidity requirements can lead to mold if ventilation is poor., small wild colony size means captive colonies may be fragile., predatory diet requires live prey, which can be challenging., ergatoid queen system may differ from typical founding, research needed.

Understanding Onychomyrmex doddi - The Army Ant Relatives

Onychomyrmex doddi belongs to the Amblyoponinae subfamily, often called 'dracula ants' due to their feeding habits. Workers are tiny at 2-2.5 mm with dark chestnut to nearly black coloration. The queen is nearly 4 mm. The species is part of the POA clade, characterized by army ant-like behavior including nomadic colonies and modified wingless queens called ergatoids ^[2]. The species was first described by W.M. Wheeler in 1916 from specimens in Kuranda, Queensland ^[1].

Housing and Nest Setup

Maintaining proper humidity is critical for O. doddi. In the wild, they nest in small logs in damp, shady spots, so keep nest substrate consistently moist in captivity. A test tube setup works well for founding colonies. Given their small size, escape prevention is straightforward with standard barriers. For established colonies, Y-tong or plaster nests that retain humidity are suitable. Provide a humidity gradient for self-regulation. ^[1]

Feeding and Diet

O. doddi is predatory and requires live protein prey such as fruit flies, pinhead crickets, or small mealworms. Sugar sources may be accepted experimentally but are not primary. Feed small prey every 2-3 days and remove uneaten items after 24 hours to prevent mold. ^[1]

Temperature and Seasonal Care

Keep temperatures warm and stable, roughly 22-26°C, based on their tropical habitat. Place heating elements on top of the nest to avoid drying moisture. A slight temperature reduction in winter may be appropriate but is unconfirmed. ^[1]

Colony Structure and Reproduction

O. doddi has ergatoid queens, which are wingless, unlike typical winged queens. This is characteristic of the POA clade ^[2]. The single documented wild colony had up to 50 workers with one female ^[1]. Reproductive cycles are not well understood, and observation is needed for more data.

Frequently Asked Questions

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References