Pheidole rugulosa

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Native to the Nearctic region, found in Texas, New Mexico, Arizona, and northern Mexico. Inhabits xeric desert habitats at 1300-1700m elevation, including grassland desert, rabbitbrush-mesquite desert, and riverbank scrub ^[1][2][3].
• Colony Type: Polygynous (multi-queen) colonies, at least sometimes, which is unusual for Pheidole. Polydomous, they nest in multiple connected locations ^[1][2].
• Size & Growth:
  • Queen: 4.67mm ^[1]
  • Worker: Minors 2.42mm, majors 3.62mm ^[1]
  • Colony: Up to several hundred workers ^[1]
  • Growth: Moderate
  • Development: 6-8 weeks (estimated based on typical Pheidole patterns) (Development time is inferred from genus patterns, specific timing for this species is unknown.)
• Antkeeping:
  • Temperature: Keep warm, roughly 22-26°C, as they are active from May to October in the wild ^[3].
  • Humidity: Keep nest substrate dry to slightly moist, as they nest in exposed desert soil ^[3].
  • Diapause: Unknown, no specific data, but as a temperate species, winter diapause may be required.
  • Nesting: Prefer dry nests like Y-tong or plaster with exposed soil areas, mimicking their natural desert nesting ^[1][3].
• Behavior: Generally peaceful toward keepers. Seed harvesters that use trunk trails for foraging ^[4]. Escape risk is moderate due to small size, standard barriers work. WARNING: This species is non-native in New Zealand and considered invasive ^[5]. It is NOT recommended to keep this species in countries where it is not native.
• Common Issues: polydomous colonies may establish secondary nests in the outworld if given the chance ^[2], desert species are sensitive to overwatering, too much humidity can kill them, majors can get stuck in water barriers, use appropriate escape prevention, seed-harvesting behavior may ignore liquid sugar water initially, offer seeds and protein alongside, colonies may be slow to establish compared to tropical species, patience is needed during founding

Housing and Nest Setup

Use a test tube setup for founding colonies with a water reservoir and cotton plug. For larger colonies, a Y-tong or plaster nest works well. These ants are small, so ensure chambers are appropriately sized. They naturally nest in exposed soil, so provide dry substrate areas. Because they are polydomous, they may spread across multiple nest sites ^[1][2].

Feeding and Diet

As seed harvesters, offer grass seeds, millet, and other small seeds. Provide protein like fruit flies or pinhead crickets 2-3 times per week. Sugar sources are accepted but not primary, offer occasional honey water. Use trunk trails to place food along established paths for recruitment ^[3][4].

Temperature and Seasonal Care

Keep at 22-26°C, with a gentle gradient if possible. They are active from May to October in the wild. Winter diapause is unknown but may be needed for temperate species. Reduce feeding during colder months but maintain moisture ^[3].

Colony Structure and Behavior

Colonies are polygynous and polydomous, with multiple queens and nest sites. Workers include minors for foraging and majors for defense. They use trunk trails for efficient foraging ^[1][2][4].

Escape Prevention

Use fluon barriers on formicarium rims. Test tubes should have tight cotton plugs. Water barriers should be shallow to avoid majors getting stuck. Check connections regularly due to polydomous behavior.

Growth and Development

Colonies grow moderately. A queen may lay eggs alone, and first workers emerge in 6-8 weeks under optimal conditions. Growth depends on temperature and feeding. Polygynous colonies may grow faster due to multiple egg-layers ^[1].

Frequently Asked Questions

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References