Pheidole humeralis

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Texas, United States, documented from Corsicana ^[1]. Based on genus patterns, likely inhabits warm, semi-arid areas where they nest in soil or under stones.
• Colony Type: Likely monogyne (single queen), based on typical Pheidole patterns. The genus is known for single-queen colonies with distinct worker castes.
• Size & Growth:
  • Queen: Size data unavailable, estimated at 5-7 mm based on typical Pheidole queens (inferred from genus).
  • Worker: Size data unavailable, minor workers estimated at 2-3 mm, major workers estimated at 3-4 mm (inferred from genus).
  • Colony: Up to several hundred workers, estimated based on genus patterns.
  • Growth: Moderate
  • Development: Estimated 6-8 weeks at optimal temperature (inferred from related Pheidole species). (Temperature-dependent, actual timing may vary.)
• Antkeeping:
  • Temperature: Keep at 24-28°C, preferred warm conditions typical of their Texas habitat. A heating cable on one side of the nest creates a suitable gradient. (No specific study for this species.)
  • Humidity: Provide a gradient: keep the nest substrate moderately dry to slightly moist, with one small damp area. Avoid waterlogging. Based on typical Pheidole preferences.
  • Diapause: Likely yes, Texas experiences cool winters. Reduce temperature to 10-15°C from late fall through early spring (estimated from genus patterns).
  • Nesting: Test tubes work well for founding colonies. Established colonies do well in Y-tong (AAC), plaster, or soil nests with compact, dry chambers. Avoid acrylic nests.
• Behavior: Generally peaceful, not aggressive toward keepers. They have a functional sting (subfamily Myrmicinae, tribe Attini) but it is rarely used and mild. Major workers (soldiers) are primarily for seed-crushing and defense. Minor workers are active foragers. Moderate escape risk due to small size, use standard barriers like fluon or oil.
• Common Issues: colonies may stall if temperatures drop below 20°C for extended periods, major workers may not appear until the colony reaches moderate size, this is normal, overwatering can cause fungal problems, keep substrate drier rather than wetter, wild-caught colonies may contain parasites, slow initial growth during founding phase can lead to overfeeding or disturbance

Housing and Nest Setup

Pheidole humeralis adapts well to various captive setups. For founding colonies, a simple test tube setup works well. Once the colony grows, you can move them to a Y-tong (AAC) or plaster nest with appropriately sized chambers. Keep the nest substrate moderately dry to slightly moist, avoid wet conditions. A thin layer of substrate in the outworld allows natural foraging. Use standard escape prevention like fluon or oil on barriers.

Feeding and Diet

Based on typical Pheidole feeding habits, Pheidole humeralis is primarily granivorous (seed-eating), but they also accept insect protein. Offer small seeds like millet or chia, and small insects like fruit flies or cricket pieces. Minor workers forage and bring food back to the nest, while major workers crack seeds. Feed seeds continuously and protein every 2-3 days. Remove uneaten prey after 24 hours.

Temperature and Seasonal Care

Maintain temperatures between 24-28°C for optimal activity. A heating cable on top of the nest creates a gentle warmth gradient. During winter (November to February), reduce temperatures to 10-15°C to mimic natural seasonal changes, a rest period likely benefits colony health. Reduce feeding during this dormant phase.

Colony Development and Castes

Like other Pheidole, the first brood typically consists of minor workers (nanitics). These small workers forage and care for the queen and brood. Major workers (soldiers) develop later as the colony grows, usually once the colony reaches an estimated 50-100 workers. The appearance of majors is a sign of a healthy colony. Development timelines are inferred from related species, actual timing for P. humeralis may vary.

Frequently Asked Questions

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References