Myrmicocrypta bucki

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Amazon rainforest of Peru (Madre de Dios) and Brazil (Amapá, Amazonas). Type locality is at 276m elevation in primary forest habitat at the Centro de Investigación y Capacitación Río Los Amigos (CICRA) in Peru ^[1][3].
• Colony Type: Unconfirmed, only worker caste has been described. As a fungus-growing ant in the genus Myrmicocrypta, colonies likely start with a single claustral queen who cultivates a fungal garden, but this is inferred from related species rather than directly documented.
• Size & Growth:
  • Queen: Unknown, queen caste has not been described ^[1]
  • Worker: 3.3-3.7mm (total length 3.28-3.65mm) ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, no development data available
  • Development: Unknown, no direct development data exists for this species (Development timeline must be estimated from related Attini species. Based on typical fungus-growing ant patterns, expect 6-10 weeks from egg to first worker at optimal temperature.)
• Antkeeping:
  • Temperature: Keep at 24-28°C based on its Amazonian rainforest origin. Provide a temperature gradient allowing workers to self-regulate. Room temperature in most homes (20-24°C) may be slightly cool, consider gentle bottom heat if workers appear sluggish.
  • Humidity: High humidity required (70-85%). This species comes from the humid Amazon forest floor. Keep nest substrate consistently moist but not waterlogged. Provide a water tube for drinking water.
  • Diapause: Unknown, no data on overwintering requirements. As a tropical species, it likely does not require true hibernation but may reduce activity during cooler periods.
  • Nesting: In nature, Myrmicocrypta species typically nest in soil or decaying wood on the forest floor. For captivity, a test tube setup works well for founding colonies. Once established, a small naturalistic setup with moist soil and a fungus chamber works best. Avoid dry conditions.
• Behavior: Temperament is not directly documented but Myrmicocrypta species are generally non-aggressive and shy, typical of fungus-farming ants. Workers are small (3.3-3.7mm) so escape prevention should focus on preventing escapes through small gaps. They possess a stinger but are not known to use it defensively against humans. As fungus growers, their main defense is retreating into the nest. Foraging is likely slow and deliberate, focused on maintaining their fungal garden.
• Common Issues: queen and colony structure unconfirmed, keepers should expect uncertainty in founding behavior, fungus garden maintenance is critical, without healthy fungus, the colony will starve, high humidity requirements can lead to mold problems if ventilation is poor, small worker size means escapes through fine gaps are possible, no established care guidelines exist, this is an expert-level species with limited documentation

Fungus Farming Biology

Myrmicocrypta bucki belongs to the Attini tribe, a group of ants that have evolved a mutualistic relationship with fungus. Unlike leafcutter ants that cut fresh vegetation, Myrmicocrypta species are 'cryptic' fungus farmers that likely collect organic debris, dead insects, and fecal matter to cultivate their fungal garden ^[4][5]. The fungus serves as the primary food source for the colony, including larvae and adults. In captivity, you must maintain a healthy fungal culture. This typically involves providing organic material (small pieces of dead leaves, wood fragments, or specialized fungus-growing ant food) that the ants can use as substrate for the fungus. The fungus appears as a white, thread-like mass that the ants tend carefully. If the fungus dies or is lost, the colony will not survive.

Housing and Nest Setup

For founding colonies, a standard test tube setup works well. Fill a test tube with water and plug with cotton, providing a dark, humid chamber. Place the queen (once you obtain one) in the tube and allow her to seal herself in. The queen will establish a small fungal garden. For established colonies, a naturalistic setup with moist substrate (peat, coco fiber, or soil mix) works best. Include a small chamber or area where the fungus can grow. Avoid using materials that might introduce pesticides or chemicals. Provide an outworld area for foraging. Because this is a small species, ensure any connections between nest areas and outworld are not too large, but also not so small that workers cannot pass through easily.

Feeding and Nutrition

As a fungus-growing ant, M. bucki requires a fungal culture as its primary food source. The ants feed on the fungus itself, not on traditional ant foods. In captivity, you can support the fungus by providing small amounts of organic matter: dead leaves, wood fragments, seed husks, or very small pieces of fruit. Some keepers report success with specialized fungus-growing ant formulas. Additionally, provide a small water source. Protein supplements in the form of very small insects may be accepted and help support the fungal garden, but the fungus should always be the primary food. Avoid overfeeding, excess organic matter can mold and harm the colony.

Temperature and Humidity

Myrmicocrypta bucki originates from the Amazon rainforest, requiring warm and humid conditions. Keep temperatures in the range of 24-28°C. A slight gradient allowing the colony to choose its preferred temperature is ideal. Use a heating mat on one side of the nest if room temperature is below 24°C. Humidity should be high, aim for 70-85% relative humidity. The nest substrate should remain consistently moist but never waterlogged. Allow some areas to be slightly drier so the ants can self-regulate. Monitor for condensation on test tube walls or nest surfaces, some condensation is normal and indicates good humidity.

Challenges and Expert-Level Care

Myrmicocrypta bucki is an expert-level species because it is poorly documented in both scientific literature and the antkeeping hobby. The queen has never been described, meaning there is no confirmed information about founding behavior, colony structure, or development timeline. Keepers must be prepared for uncertainty and should approach this species as a learning opportunity. The critical challenge is maintaining a healthy fungal culture, without the fungus, the colony cannot survive. This requires careful balance of humidity, temperature, and organic substrate. Mold is a constant threat. Additionally, obtaining a founding queen may be extremely difficult as this species is rarely collected and not commonly available in the antkeeping trade ^[1][6].

Frequently Asked Questions

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References