Pheidole quadricuspis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Lowland dipterocarp forests in Southeast Asia (Borneo, Brunei, Indonesia, Malaysia, Philippines, Thailand). Nests in rotting twigs and wood blocks on the forest floor ^[5][4].
• Colony Type: Monogyne, single queen colonies. Only one dealate queen has been observed in any colony examined ^[5].
• Size & Growth:
  • Queen: Size data unavailable, no total length measurements in literature. Inferred from Pheidole genus as approximately 6-8 mm.
  • Worker: Major: 4.1-5.1 mm, Minor: 2.4-2.5 mm ^[2].
  • Colony: Unknown, no colony size data available in literature.
  • Growth: Moderate, inferred from typical Pheidole development patterns.
  • Development: Estimated 6-8 weeks at tropical temperatures based on genus-level patterns. (Direct development data unavailable, estimate based on related Pheidole species.)
• Antkeeping:
  • Temperature: Keep warm, roughly 24-28°C, based on tropical lowland habitat.
  • Humidity: Keep nest substrate consistently moist but not waterlogged, as they inhabit damp forest floor environments ^[5].
  • Diapause: No, tropical species from Southeast Asian lowlands does not require hibernation.
  • Nesting: Prefer tight, humid spaces with wood material, such as Y-tong or plaster nests with small chambers ^[5].
• Behavior: Diurnal ants active only during the day ^[6]. Minor workers are nearly smooth with few standing hairs, while majors have longitudinal rugose sculpture on the frons ^[2]. They are not aggressive but will defend the nest. Escape risk is moderate due to small worker size, standard barriers may need reinforcement.
• Common Issues: cold temperatures can be fatal, maintain above 24°C year-round., low humidity can cause dehydration, keep substrate moist but not waterlogged., small minor workers may escape through standard barriers, use fine mesh or fluon., wild-caught colonies may carry parasites, quarantine new collections.

Housing and Nest Preferences

Pheidole quadricuspis naturally nests in rotting twigs and wood blocks on the forest floor ^[5]. In captivity, use a Y-tong or plaster nest with small chambers to mimic tight, humid spaces. Connect to a small outworld for foraging. Since minor workers are only 2.4-2.5 mm, ensure escape barriers are tight, use fine mesh or fluon on test tube rims.

Feeding and Diet

As members of the Attini tribe, these ants store seeds but are opportunistic omnivores. Offer a varied diet including small seeds, protein sources like fruit flies or cricket parts, and sugar water or honey. Stable isotope data shows an omnivorous trophic position ^[7]. Feed protein 2-3 times per week and keep sugar water available constantly.

Temperature and Humidity

This tropical species requires warm, stable conditions. Keep the nest area at 24-28°C with a gentle gradient for self-regulation. Humidity should be maintained by keeping the nest substrate consistently moist but not waterlogged, as they inhabit damp forest floors. ^[5]

Colony Structure and Development

Colonies are monogyne with a single queen ^[5]. Major workers (4.1-5.1 mm) develop from larger larvae than minors (2.4-2.5 mm) ^[2]. Founding behavior is unconfirmed. Growth is moderate, with estimated 6-8 weeks from egg to first worker at tropical temperatures.

Behavior and Activity

These ants are strictly diurnal, active only during the day ^[6]. Minor workers are smooth with few hairs, while majors have rugose frons sculpture ^[2]. They are not aggressive but defend the nest. Their spinescent morphology is a key feature of the quadricuspis group ^[1].

Frequently Asked Questions

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References