Pheidole aciculata

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Amazon basin in Peru and Brazil, specifically recorded in terra firme forest in Madre de Dios, Peru ^[1][2]. Nests in clayey soil, constructing small crater entrances ^[3].
• Colony Type: Unconfirmed
• Size & Growth:
  • Queen: Size data unavailable for this species. Based on Pheidole genus patterns, queens are typically 6-10 mm long.
  • Worker: Size data unavailable for this species. Based on Pheidole genus patterns, workers are typically 1-3 mm long.
  • Colony: Unknown for this specific species. Typical Pheidole colonies reach several hundred to a few thousand workers.
  • Growth: Moderate, inferred from related species
  • Development: 6-10 weeks, estimate based on typical Pheidole development at tropical temperatures. (Development time is unconfirmed for this species. At optimal tropical temperatures (24-28°C), expect relatively fast growth compared to temperate species.)
• Antkeeping:
  • Temperature: Keep at 24-28°C, this matches their Amazonian origin and supports active colony development. A slight gradient allows workers to self-regulate. Room temperature in most homes (20-24°C) may be slightly cool but often acceptable.
  • Humidity: Maintain moderate to high humidity consistent with terra firme forest floor conditions. Keep the nest substrate moist but not waterlogged. Provide a water source.
  • Diapause: No, as an Amazonian species, they do not require hibernation. Keep temperatures stable year-round.
  • Nesting: In nature, they nest in clayey soil with small crater entrances ^[3]. In captivity, standard test tubes work for founding colonies. Once established, a naturalistic setup with soil or a Y-tong/plaster nest with chambers scaled to their small size works well. Ensure the nest material can hold moisture ^[3].
• Behavior: Pheidole aciculata shows typical Pheidole behavior, they are active foragers with major workers capable of carrying larger food items. They are not aggressive toward keepers but majors may defend the colony. Escape risk is moderate due to their small size, use standard barrier methods. They are primarily seed-harvesting and omnivorous, with a tendency to collect seeds and protein sources.
• Common Issues: limited data means care requirements are estimated from genus-level knowledge rather than species-specific research, small colony size makes them vulnerable to stress, avoid disturbing founding queens, tropical species may struggle in air-conditioned environments with temperature swings, test tube setups can dry out quickly in low humidity, monitor moisture levels, wild-caught colonies may carry parasites that are difficult to detect

Housing and Nest Setup

For founding colonies, a simple test tube setup works well. Fill the tube with water and plug the end with cotton, providing a humid chamber for the queen. The tube should be darkened to reduce stress, you can wrap it in aluminum foil or place it in a drawer. Once the colony establishes and workers emerge, you can consider moving them to a more elaborate formicarium. For established colonies, a naturalistic setup with moist soil or a Y-tong/plaster nest with appropriately sized chambers works well. The species naturally nests in clayey soil, so a substrate-based nest mimics their natural conditions ^[3]. Ensure the nest has chambers small enough for these tiny ants.

Feeding and Diet

Pheidole aciculata is an omnivorous seed-harvester like most Pheidole species. Offer a varied diet including small seeds (millet, sesame, flax seeds crushed slightly), protein sources (small insects like fruit flies, pinhead crickets, mealworms), and sugar sources (honey water, sugar water). Feed protein 2-3 times per week and keep sugar water available constantly. Remove uneaten food after 24-48 hours to prevent mold. The presence of major workers means they can handle larger food items than many similarly-sized ants. Fresh killed insects are preferred over dried. Always provide a clean water source.

Temperature and Seasonal Care

As an Amazonian species from Peru and Brazil, Pheidole aciculata requires warm conditions year-round. Keep the nest area at 24-28°C for optimal brood development. Temperatures below 20°C may slow or halt development, while temperatures above 32°C can stress the colony. A heating cable on one side of the nest creates a temperature gradient allowing workers to self-regulate. Place the heating element on top of the nest to avoid drying out the substrate. Unlike temperate species, they do not require hibernation or winter cooling. Maintain stable temperatures without drafts or air conditioning blowing directly on the colony.

Colony Development

This species remains poorly documented in scientific literature, so colony development details are estimates based on related Pheidole species. The queen is likely claustral, she seals herself in a chamber and raises the first brood using stored fat reserves without foraging. First workers should emerge in 6-10 weeks at optimal temperature (24-28°C). Initial colonies grow slowly as the queen is limited to producing a small number of eggs. Once nanitics emerge, colony growth accelerates. Pheidole colonies are dimorphic, they produce both minor workers and major workers. Major production typically increases as the colony matures. A mature colony may reach several hundred to a few thousand workers.

Behavior and Observation

Pheidole aciculata shows typical Pheidole foraging behavior, minor workers scout for food while major workers can carry larger items back to the nest. The species is not particularly aggressive but majors will defend the colony if threatened. They are diurnal foragers, actively searching during daylight hours. The most distinctive morphological feature is the needle-like propodeal spines, these are exceptionally thin and sharp even by Pheidole standards ^[3]. Observation is relatively easy as they forage openly and are not excessively shy.

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References