Scientific illustration of Pheidole rugocephala ant - showing key identification features including head, thorax, and gaster.

Pheidole rugocephala

Non-Parasitic Queen No Gamergate
Sci. Name
Pheidole rugocephala
Tribe
Attini
Subfamily
Myrmicinae
Author
Salata & Fisher, 2020
Distribution
Found in 1 countries
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Introduction

Pheidole rugocephala is a small ant species native to Madagascar, first described in 2020. It belongs to the Pheidole ferruginea species group and is found in rainforest, montane rainforest, and littoral rainforest habitats at elevations between 15-1200 meters . The species name means 'strong and distinct head sculpture' in Latin, referring to the major workers' head shape . Worker size is inferred from the Pheidole genus, with typical sizes around 2-4 mm for minors and larger for majors [inferred from Pheidole genus]. This species is similar to Pheidole ferruginea but distinguished by pitted antennal scrobes and a smooth promesonotum . As a rainforest species, it requires warm and humid conditions. Nesting preferences are unknown in the wild .

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Status by country, from Kass et al. 2022 & Wong et al. 2023

Native Invasive Introduced (indoor) Intercepted Unknown
Data Sources
Year Range 2000 - 2026

Quick Summary

  • Difficulty: Medium
  • Origin & Habitat: Madagascar, specifically the Toamasina region in eastern Madagascar. Found in rainforest, montane rainforest, and littoral rainforest at elevations of 15-1200 meters [1][2].
  • Colony Type: Unconfirmed for this species.
  • Size & Growth:
    • Queen: Size data unavailable, inferred from Pheidole genus as approximately 6-8 mm
    • Worker: Size data unavailable, inferred from Pheidole genus as approximately 2-4 mm for minor workers, with majors being larger
    • Colony: Unknown, no colony size data available
    • Growth: Moderate, based on typical Pheidole development patterns
    • Development: Estimated 5-8 weeks at optimal temperature based on genus-level data for similar Pheidole species (Development time is estimated as this species has not been directly studied.)
  • Antkeeping:
    • Temperature: Keep at 24-28°C, based on tropical rainforest habitat [1][2]. A heating cable on one side of the nest can create a gentle gradient.
    • Humidity: Keep the nest substrate consistently moist but not waterlogged, based on rainforest habitat [1][2].
    • Diapause: No diapause required, as a tropical species from Madagascar [2].
    • Nesting: Nesting preferences are unknown. For captivity, a Y-tong (AAC) or plaster nest works well for these small ants [2].
  • Behavior: These ants are generally peaceful but will defend their nest if threatened. As a small species, escape prevention is important due to their size [2]. Workers are active foragers that search for food.
  • Common Issues: high humidity maintenance is critical, this rainforest species dies quickly in dry conditions, escape prevention is important due to their small size, colonies may grow slowly initially, patience is needed during the founding stage, wild-caught colonies may carry parasites that can cause colony failure, test tube setups can dry out quickly, monitor moisture levels regularly

Housing and Nest Setup

Pheidole rugocephala is a small rainforest ant that requires careful attention to humidity. A Y-tong (AAC) nest or plaster nest works well for this species, both hold moisture better than wooden setups. If using a test tube setup for founding colonies, place it in a humid enclosure to prevent drying. The nest area should be kept consistently moist but never waterlogged. For the outworld, provide a shallow water source and ensure any sugar foods don't dry out. Because these ants are small, use fine mesh on any ventilation holes and ensure lid seals are tight [2].

Feeding and Diet

Pheidole species are typically seed-harvesters and generalist foragers. In captivity, offer a varied diet including small seeds like millet or sesame, protein sources like fruit flies or small mealworms, and sugar sources like honey water or sugar water [2]. Feed protein 2-3 times per week and keep sugar water available constantly. Remove any uneaten food after 24-48 hours to prevent mold.

Temperature and Humidity Requirements

This is a tropical rainforest species from Madagascar, so it needs warm and humid conditions. Keep the nest area at 24-28°C, temperatures below 22°C may slow activity and development [1][2]. Use a heating cable on one side of the nest if your room temperature is below this range. Humidity is critical: keep the nest substrate consistently moist but not waterlogged [1][2].

Colony Development and Growth

Pheidole rugocephala has distinct major and minor worker castes. The founding stage typically takes several months before the first workers emerge. Once the colony establishes, growth is moderate. The queen lays eggs, and brood development takes an estimated 5-8 weeks from egg to worker at optimal temperature. Major workers appear as the colony grows and are used for seed processing and nest defense.

Behavior and Temperament

These ants are generally calm and not aggressive toward keepers. Major workers will defend the nest if threatened but rarely bite or sting. Workers are active foragers that search the outworld for food. They are not known for escape attempts but their small size means they can slip through tiny gaps. Observe your colony's activity patterns, healthy workers should be actively foraging and tending brood. [2]

Frequently Asked Questions

How long does it take for Pheidole rugocephala to produce first workers?

The time from founding to first workers is estimated to be 4-8 weeks after eggs are laid, but the initial founding stage can take several weeks to months. Expect 2-4 months from queen capture to seeing your first workers emerge.

What do Pheidole rugocephala ants eat?

They are generalist foragers that accept seeds, small insects, and sugar sources. Offer small seeds like millet, protein like fruit flies, and keep honey water or sugar water available [2]. Remove uneaten food after 24-48 hours.

What temperature do Pheidole rugocephala ants need?

Keep them at 24-28°C. This is a tropical rainforest species from Madagascar that prefers warm conditions [1][2].

How often should I feed Pheidole rugocephala?

Offer protein like insects or seeds 2-3 times per week. Keep sugar water or honey water available constantly [2]. Remove uneaten food after 24-48 hours.

Are Pheidole rugocephala good for beginners?

They are rated as medium difficulty. The main challenges are maintaining high humidity and ensuring escape prevention due to their small size. Experienced antkeepers will have more success with this species.

Do Pheidole rugocephala need hibernation?

No, they do not need hibernation. As a tropical species from Madagascar, they prefer consistent warm temperatures year-round [2].

How big do Pheidole rugocephala colonies get?

Colony size is unknown for this specific species. Typical Pheidole colonies can reach several hundred workers at maturity, but growth is moderate.

Can I keep multiple Pheidole rugocephala queens together?

Colony structure is unconfirmed for this species. It is not recommended to combine unrelated queens. If you capture a queen, house her alone until workers emerge.

Why are my Pheidole rugocephala dying?

The most common causes are low humidity (this rainforest species dries out easily), temperatures below 22°C, and escape due to their small size. Check that the nest substrate is moist, temperature is in the 24-28°C range, and that all gaps are sealed with fine mesh.

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References

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This caresheet is licensed under CC BY-SA 4.0 .