Myrmicocrypta collaris

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Peru (Neotropical region). Found in tropical forest habitats, typically nesting in soil or decaying wood ^[1][2].
• Colony Type: Colony structure is unconfirmed for this species. Based on typical Attini patterns, single-queen colonies are common in the tribe.
• Size & Growth:
  • Queen: Size data unavailable, the original description by Emery (1913) did not provide measurements ^[2].
  • Worker: Size data unavailable, no worker measurements have been documented ^[2].
  • Colony: Colony size data unavailable for this species
  • Growth: Growth rate is unconfirmed
  • Development: Development timeline is unconfirmed for this species (Attini development is generally temperature-dependent, but specific data for M. collaris is unavailable.)
• Antkeeping:
  • Temperature: Temperature requirements are unconfirmed for this species. As a tropical Peruvian ant, warm conditions are likely needed, start around 24-26°C and observe colony behavior.
  • Humidity: Humidity requirements are unconfirmed. As a fungus-cultivating ant, moderate to high humidity is likely beneficial, keep the nest substrate consistently moist but not waterlogged.
  • Diapause: No, this is a tropical species that does not require hibernation. Maintain warm conditions year-round.
  • Nesting: Y-tong (AAC) nests or plaster nests work well for fungus-growing ants. The nest should hold humidity effectively. Naturalistic setups with soil and decaying wood also work ^[2].
• Behavior: These ants are peaceful. Workers are small and may be overlooked due to their size. They are not escape artists but their small size means fine mesh on any ventilation openings is recommended. The most notable behavior is their fungus cultivation, workers tend to a fungal garden that serves as their food source. They do not scavenge like typical ants but instead harvest and maintain their fungal crop ^[2].
• Common Issues: Fungal garden failure is the primary risk, if the fungus dies, the colony will starve. Never let the fungus dry out or become contaminated., Temperature extremes outside their tolerance range can harm the colony and fungal garden., Overfeeding can cause fungal rot, only provide small amounts of substrate material at a time., Wild-caught colonies may have parasites or diseases that affect the fungus culture., Limited scientific data means care requirements are not fully understood, monitor your colony closely and adjust conditions as needed.

Fungus Cultivation - The Key to Their Survival

Myrmicocrypta collaris belongs to the tribe Attini, a group of ants that evolved a unique agricultural symbiosis. Unlike most ants that hunt insects or collect honeydew, Attini ants cultivate fungus for food. The colony maintains a fungal garden within the nest, with workers constantly tending, pruning, and harvesting the fungus. This fungus is the colony's sole food source, the ants do not eat insects or sugar. For captive care, you must provide suitable fungal substrate. This typically consists of fresh plant material (leaf fragments, flower petals, or grass) that the ants use to inoculate and feed their fungal garden. The key challenge is maintaining a healthy fungal culture, it must stay moist but not rot, and receive fresh substrate regularly. A failing fungal garden will turn dark and slimy, at which point the colony typically dies within weeks ^[2].

Feeding and Nutrition

Feeding Attini ants is fundamentally different from typical antkeeping. These ants do not accept sugar water, honey, or protein-rich foods like mealworms. Their diet consists entirely of the fungal garden they cultivate. You must provide fresh plant material regularly, small pieces of leaves, flower petals, grass clippings, or other organic matter. The ants will process this material and add it to their fungal garden. The fungus then digests this material, and the ants consume the fungal strands. Only provide small amounts of fresh material at a time to prevent mold. Remove any uneaten plant material before it rots. The feeding schedule depends on colony size, a small colony needs only tiny amounts, while larger colonies consume more. Watch how quickly they process what you provide and adjust accordingly ^[2].

Nest Setup and Housing

For Myrmicocrypta collaris, Y-tong (AAC) nests or plaster nests work well because they hold humidity effectively. The nest chambers should be appropriately sized for their tiny workers, narrow passages and small chambers are better than large open spaces. Include a water reservoir to maintain humidity. The foraging area should be simple, with a small dish or area for placing fresh plant material. Use fine mesh on any ventilation to prevent escapes since these are very small ants. Avoid naturalistic setups unless you have experience with Attini husbandry, as mold control is more difficult. A simple setup with good humidity control is preferable. Avoid moving or disturbing the nest once the fungal garden is established, this can damage the sensitive fungal culture ^[2].

Temperature and Seasonal Care

As a tropical species from Peru, Myrmicocrypta collaris likely requires warm conditions year-round. Start with the nest area at approximately 24-26°C and monitor the colony. Observe how the ants behave, if they seem sluggish, try slightly warmer conditions. If the fungus appears to struggle, adjust gradually. Since this is a tropical species, no hibernation or diapause is needed. Maintain consistent warm conditions throughout the year. Avoid placing the nest near air conditioning vents or in drafty areas. Room temperature in most homes may be too cold, check with a thermometer and add heating if needed ^[2].

Behavior and Observation

Observing Attini ants is a unique experience in antkeeping. Unlike typical ants that run frantically searching for food, Myrmicocrypta workers move with deliberate purpose, tending their fungal garden. You will see workers pruning the fungus with their mandibles, harvesting small pieces, and carrying plant material into the nest to feed the garden. This behavior is fascinating to watch and represents millions of years of co-evolution. The ants possess a stinger but are not aggressive and rarely use it. They are small and may seem timid. Colonies are quiet and do not produce much activity in the outworld. The main activity happens inside the nest where the fungal garden is tended. This species is best suited for keepers who are interested in observing unusual ant biology rather than watching active foraging ^[2].

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