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

Pheidole arcifera

Monogynous Non-Parasitic Queen No Gamergate
Sci. Name
Pheidole arcifera
Tribe
Attini
Subfamily
Myrmicinae
Author
Santschi, 1925
Distribution
Found in 1 countries
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Introduction

Pheidole arcifera is a large member of the fallax group, native to Brazil, specifically Minas Gerais . These ants are recognized by their distinctive major workers with carinulate heads and reddish-brown coloration. The species belongs to the Myrmicinae subfamily and is known only from its type locality . The biology of this species is largely unstudied. However, as a Pheidole species, they are soil-nesting ants with subterranean colonies, large colony sizes, and mass recruitment behavior . They are generalist omnivores and can be aggressive in defending territory.

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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: Neotropical Brazil, Minas Gerais, Pirapora. Found in seasonal semi-deciduous forest regions [1][2].
  • Colony Type: Colony structure is unconfirmed. No specific data on queen number or social structure.
  • Size & Growth:
    • Queen: Size data unavailable for body length. Based on Pheidole genus patterns, queens are typically 8-12mm, but no species-specific data.
    • Worker: Size data unavailable for body length. Head width measurements exist but are not body size.
    • Colony: Up to thousands of workers, based on functional group classification [3].
    • Growth: Moderate, inferred from related species
    • Development: 6-8 weeks estimated based on typical Pheidole development patterns [3]. (Development time is unconfirmed for this species, estimates based on genus-level patterns)
  • Antkeeping:
    • Temperature: Keep warm around 24-28°C. Based on Brazilian species habitat [3].
    • Humidity: Keep nest substrate consistently moist but not waterlogged, as they are soil-nesting [3].
    • Diapause: Unconfirmed. Brazilian species may not require hibernation.
    • Nesting: Soil-nesting species. Use naturalistic setup with deep substrate or Y-tong/plaster nest [3].
  • Behavior: Aggressive in defending territory, perform mass recruitment. Minors handle foraging, majors for defense [3]. Escape risk is moderate due to small minors, standard barrier methods work.
  • Common Issues: large colony size requires significant space for expansion, aggressive behavior may lead to conflicts with other species if housed nearby, temperature stability is important, avoid drafts or cold temperatures

Nest Preferences

Pheidole arcifera is a soil-nesting species that builds subterranean colonies in natural habitats [3]. In captivity, they do well in naturalistic setups with deep soil substrate that allows them to excavate chambers, or in Y-tong/plaster nests designed for soil-dwelling species. The nest should have chambers scaled to their colony size. Provide a moisture reservoir to keep the substrate consistently damp without becoming waterlogged. These ants are not arboreal, so horizontal floor space is more important for colony expansion.

Feeding and Diet

As soil omnivores with mass recruitment behavior, Pheidole arcifera accepts a wide variety of foods. They are generalists that will collect proteins, sugars, and seeds. Offer protein sources like mealworms or crickets twice weekly. Sugar can be provided through honey water or sugar water. They may also process seeds, so offering birdseed or grass seeds can provide enrichment. Remove uneaten food after 24-48 hours to prevent mold. [3]

Temperature and Care

As a Brazilian species, Pheidole arcifera prefers warm conditions around 24-28°C [3]. This temperature range supports normal colony activity. Use a heating cable to create a gentle gradient if room temperature is below this range. Avoid temperatures below 20°C. Stable temperatures are important, avoid placing the colony near air conditioning vents or drafty areas.

Behavior and Temperament

Pheidole arcifera exhibits classic Pheidole behavior with distinct major and minor worker castes. Majors have specialized large heads for defense and processing food. They perform mass recruitment when foragers find food [3]. This species is aggressive in interspecific interactions and will defend its territory vigorously. They are not suitable for housing near other ant species. The primary defense mechanism is a sting, though it is less medically significant to humans, as typical for Myrmicinae ants.

Growth and Development

The complete development timeline for Pheidole arcifera has not been documented. Based on typical Pheidole patterns, expect eggs to develop into workers in approximately 6-8 weeks at optimal temperatures [3]. The first generation (nanitics) will be smaller than normal workers. Pheidole colonies can grow to thousands of workers, so plan housing accordingly. Growth rate is moderate, patience is required during the founding stage.

Frequently Asked Questions

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

The exact timeline is unconfirmed, but based on typical Pheidole development, expect first workers approximately 6-8 weeks after the queen lays eggs, at optimal temperatures around 24-28°C [3].

What do Pheidole arcifera ants eat?

They are generalist omnivores. Offer protein sources like small insects twice weekly, and provide constant access to sugar sources like honey water. They may also accept seeds [3].

Can I keep multiple Pheidole arcifera queens together?

This has not been documented for this species. Based on typical Pheidole behavior, they are likely single-queen colonies. It is not recommended to house multiple unrelated queens together as they may fight.

What size colony does Pheidole arcifera reach?

Based on their functional group classification as large soil-nesting ants with mass recruitment, colonies likely reach up to thousands of workers at maturity [3].

What temperature do Pheidole arcifera need?

Keep them warm at 24-28°C. Being a Brazilian species, they prefer stable warm conditions [3].

Are Pheidole arcifera good for beginners?

They are rated as medium difficulty. While their basic care is straightforward, their large colony size and aggressive behavior require some experience. They are not recommended as a first ant.

What type of nest is best for Pheidole arcifera?

A naturalistic setup with deep soil substrate or a Y-tong/plaster nest designed for soil-dwelling species works well [3].

Do Pheidole arcifera need hibernation?

This is unconfirmed. As a Brazilian species from a tropical-to-subtropical region, they likely do not require true hibernation. Maintain stable warm temperatures year-round.

Why are my Pheidole arcifera dying?

Common causes include temperatures below 20°C, overly dry or waterlogged substrate, mold from uneaten food, or stress from disturbance. Ensure proper temperature, humidity, and remove uneaten food promptly.

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References

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This caresheet is licensed under CC BY-SA 4.0 .