Pheidole obtusopilosa

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Neotropical region, Argentina, Uruguay, and southern Brazil. Found in wet mountain forests at 850m elevation and grassland habitats ^[1][2].
• Colony Type: Unconfirmed, no specific data on queen number.
• Size & Growth:
  • Queen: Estimated 5-8 mm based on Pheidole genus patterns
  • Worker: Size data unavailable for full body length
  • Colony: Up to several hundred workers, estimated based on related species
  • Growth: Moderate
  • Development: Estimated 6-8 weeks based on genus patterns (Development timeline not directly studied, estimates based on subtropical Pheidole species)
• Antkeeping:
  • Temperature: Keep at moderate temperatures, roughly 22-26°C, based on subtropical habitat
  • Humidity: Keep nest substrate consistently moist but not waterlogged, based on wet mountain forest habitat ^[2]
  • Diapause: Unknown, no specific data, but subtropical species may slow down in cooler months
  • Nesting: Ground-nesting species, prefer soil or compact substrate. In captivity, use Y-tong or plaster nests with moderate moisture ^[1]
• Behavior: Temperament: Not aggressive toward keepers but will defend nest if threatened. Escape risk: High due to small size of minor workers. Defense: As a member of Myrmicinae, they possess a stinger, but it is not medically significant to humans.
• Common Issues: escape prevention is critical due to small minor workers, use fine mesh and tight-fitting barriers, colonies may be slow to establish initially, patience is needed during founding phase, overfeeding can lead to mold in nest setups, remove uneaten protein promptly, major workers have large heads which can cause them to get stuck in narrow passages if chambers are too small

Nest Preferences

Pheidole obtusopilosa is a ground-nesting species found in soil and leaf litter in grassland and forest habitats. In captivity, they adapt well to standard formicarium setups. Y-tong (AAC) nests work well because they provide dark, humid chambers that mimic underground conditions. Plaster nests are also suitable when kept moderately moist. Provide chambers sized to accommodate both minor and major workers. A small outworld for foraging completes the setup. Avoid overly wet setups, as this species prefers moderate moisture. ^[1][2]

Feeding and Diet

Pheidole obtusopilosa is omnivorous, collecting seeds, small insects, and honeydew. In captivity, offer a varied diet: protein sources like small crickets twice weekly, and sugar sources like honey water constantly. Remove uneaten protein within 24-48 hours to prevent mold.

Temperature and Care

Maintain moderate temperatures around 22-26°C for optimal colony health. Room temperature within this range works well in most homes. If space runs cooler, use a heating cable on one side of the nest to create a gradient. During winter, if temperatures drop, consider a slight cool period at 15-18°C for 2-3 months if colony activity reduces.

Behavior and Temperament

Minor workers handle foraging, brood care, and nest maintenance, while majors defend the colony and process larger food items. This species is not aggressive toward keepers but will bite if directly handled or if the nest is threatened. Escape risk is high due to the small size of minor workers, use fine mesh on ventilation holes and seal all connections.

Colony Growth and Development

Colonies grow through the production of major and minor workers. The first generation develops quickly as the queen's initial brood matures. Growth rate is moderate, and colonies likely reach several hundred workers at maturity. The presence of both castes represents an efficient division of labor.

Frequently Asked Questions

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References