Myrmicocrypta erectapilosa

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Brazil (Amazonas, Manaus region), tropical rainforest environment ^[1][4]
• Colony Type: Colony structure is unconfirmed. Based on typical Attini patterns, likely single-queen colonies.
• Size & Growth:
  • Queen: ~4.2mm ^[1]
  • Worker: ~3.2-3.3mm ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, no development data available
  • Development: Unknown, no published development data exists for this species. (Related fungus-farming ants typically take several months from egg to worker at tropical temperatures.)
• Antkeeping:
  • Temperature: Keep warm around 24-28°C. This species is from the Brazilian Amazon and requires tropical conditions.
  • Humidity: High humidity required, aim for 70-80%. Fungus-farming ants need consistently damp conditions for their fungal gardens.
  • Diapause: No, being a tropical species, they do not require hibernation.
  • Nesting: Use a naturalistic setup with moist substrate (soil/sand mix) that can support fungal growth. Y-tong or plaster nests with a fungal chamber work well for Attini species.
• Behavior: These ants are peaceful and non-aggressive. They are slow-moving and cryptic by nature. As fungus farmers, they spend most of their time tending to their fungal garden rather than foraging actively. Workers are tiny (3.2mm) so escape prevention should be moderate, they can squeeze through small gaps but are not as prone to escaping as faster species. They have a functional stinger but it is not medically significant to humans.
• Common Issues: Fungus garden failure is the primary risk, without proper fungal substrate, the colony will starve., High humidity is critical, too dry and the fungus dies, too wet and mold becomes a problem., Very limited availability in the antkeeping hobby, this is not a species you'll find at typical suppliers., No established captive breeding protocols exist for this species., Slow growth means colonies take a long time to establish.

Fungus Farming Requirements

Myrmicocrypta erectapilosa belongs to the tribe Attini, a group of ants that cultivate fungus for food. This is their most critical care requirement. Unlike typical ants that eat insects, honeydew, or sugar, Attini ants feed their colony exclusively on fungus they grow in their nest. You must provide a fungal substrate, typically a moist mixture that the ants can plant their fungus on. Common substrates include autoclaved oat flour, rice, or other organic material that supports fungal growth. The ants will tend the fungus, removing contaminants and maintaining it. Without a healthy fungal garden, the colony will starve regardless of what other food you offer. This makes them significantly more difficult to keep than typical ant species ^[2][3].

Nest Setup and Housing

This species requires a naturalistic setup with a dedicated fungal chamber. A Y-tong nest with a separate fungal cultivation area works well, or you can use a plaster nest with a moisture reservoir. The nest must maintain high humidity (70-80%) while allowing some ventilation to prevent mold. The substrate should be kept consistently moist but never waterlogged. Because they are tiny (workers are only about 3.2mm), ensure that any connections between the nest and outworld are appropriately sized. A small test tube setup can work for founding colonies, but you will need to introduce fungal substrate once the colony has several workers. Avoid using test tubes long-term as they don't provide enough space for fungus cultivation.

Feeding and Nutrition

The primary food source is the fungal garden. You must provide appropriate fungal substrate, typically sterilized organic material like oat flour, rice, or leaf litter fragments. The process involves preparing the substrate, allowing it to cool after sterilization, and then introducing it to the ants so they can establish their garden. Beyond the fungus, you can occasionally offer tiny amounts of other organic material to supplement their diet, but the fungus should constitute the majority of their nutrition. Do not offer sugar water, honey, or typical ant sweets, this species does not consume these. Live prey is not typically accepted as they are not predatory.

Temperature and Environmental Conditions

As a species from the Brazilian Amazon, Myrmicocrypta erectapilosa requires warm, stable tropical conditions. Keep the nest at 24-28°C (75-82°F). Temperature below 22°C can slow or stop fungal growth, which will ultimately harm the colony. Use a heating cable or mat on one side of the nest to create a gentle temperature gradient, but avoid direct heat that could dry out the fungus. Room temperature in heated indoor spaces may be sufficient depending on your climate. High humidity is equally important, aim for 70-80% relative humidity in the nest area. This species does not require any diapause or winter cooling period.

Behavior and Colony Dynamics

This is a peaceful, slow-moving species. Workers spend most of their time tending the fungal garden rather than foraging. They are not aggressive. Colonies are likely small to moderate in size based on related Attini species, but no specific data exists for M. erectapilosa. The colony will expand slowly as the fungus grows and produces gongylidia (specialized fungal structures that the ants eat). Workers are tiny and may be overlooked, but you should see them actively moving between the fungus garden and any foraging areas. Unlike many ants, they do not form raiding parties or exhibit territorial behavior.

Frequently Asked Questions

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References