Myrmicocrypta camargoi

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Brazil (São Paulo, Goiás, Rio de Janeiro, Espírito Santo), found in Cerrado savanna and Atlantic Forest habitats at elevations around 825m ^[1]. Workers were collected from a pasture field dominated by Brachiaria and Paspalum grasses, and were observed near a colony of the leafcutter ant Atta capiguara ^[1].
• Colony Type: Colony structure is unconfirmed. Based on typical Attini patterns, likely single-queen colonies.
• Size & Growth:
  • Queen: 7.42-7.51 mm ^[1]
  • Worker: 4.49-4.89 mm ^[1]
  • Colony: Unknown, no colony size data exists for this species.
  • Growth: Unknown, no development timing data exists.
  • Development: Unconfirmed, no direct measurements exist for this species. (Development time is unconfirmed.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. This species comes from tropical southeastern Brazil where temperatures are consistently warm.
  • Humidity: Keep moderately humid, around 60-80%. The Cerrado and Atlantic Forest have distinct wet and dry seasons, so aim for consistently damp substrate without waterlogging.
  • Diapause: Unconfirmed. Brazilian ants from this region likely do not require true hibernation.
  • Nesting: No captive nesting data exists. In the wild, they likely nest in soil like other Myrmicocrypta species. A naturalistic setup with soil substrate or a Y-tong/plaster nest works well.
• Behavior: Behavior is poorly documented. As fungus-growing ants, they are likely less aggressive than some Attini like Atta. Workers were observed carrying grass pieces, suggesting they may harvest plant material to cultivate their fungal gardens ^[1]. Escape risk is moderate, workers are around 4-5mm so standard barriers are usually sufficient.
• Common Issues: no captive husbandry data exists, this is one of the least-studied Attini in the hobby, fungal cultivation requirements are poorly understood, may be difficult to provide proper food source, slow growth and long development times may frustrate beginners, wild-caught colonies may carry parasites or pathogens from native habitat, temperature sensitivity, may not tolerate cool conditions

Species Overview and Identification

Myrmicocrypta camargoi is the largest known species in its genus, with workers measuring 4.49-4.89mm ^[1]. The species was described in 2010 by Sosa-Calvo and Schultz, making it one of the more recently discovered Attini species. It was named after Roberto S. Camargo, who first discovered the type specimens in Brazil ^[1].

What makes these ants stand out is their distinctive pilosity, their bodies are covered with erect hairs, which is unique within the Myrmicocrypta genus ^[1]. They have very long antennal scapes that extend well past the back of their head, and their frontal lobes protrude prominently ^[1]. Workers are yellow to light ferruginous in color, with distinctive spoon-shaped or spatulate hairs concentrated mainly on their tubercles and carinae ^[1].

Queens are substantially larger at 7.42-7.51mm, while males range from 5.96-6.34mm ^[1]. The queen's head features distinctive vertexal carinae with three processes each, and their wings have a very reduced fenestra appearing as a rounded spot near the wing margin ^[1].

Natural History and Distribution

This species is known from multiple locations across southeastern Brazil. Specimens have been collected in Cerrado habitat in Botucatú (São Paulo) and Jataí (Goiás), as well as in Mata Atlantica (Atlantic Forest) in Floresta da Tijuca (Rio de Janeiro) and Santa Teresa (Espírito Santo) ^[1]. The type locality is Botucatú, São Paulo, at approximately 825m elevation ^[1].

The Cerrado is a vast tropical savanna ecosystem characterized by distinct wet and dry seasons, while the Atlantic Forest is a humid tropical forest ecosystem. Both habitats experience warm temperatures year-round. The collection sites were in pasture fields dominated by non-native African grasses like Brachiaria and Paspalum ^[1].

The type series was collected while digging out a colony of Atta capiguara (a leafcutter ant) in a pasture. Workers of M. camargoi were observed carrying small pieces of dry grass, though the actual nest entrance was never located ^[1]. This association with Atta colonies suggests similar habitat preferences, established soil environments with abundant plant material.

Fungal Cultivation and Diet

Myrmicocrypta camargoi is a fungus-growing ant (tribe Attini), which means they cultivate fungi for food rather than hunting insects or scavenging honeydew ^[2]. This is a complex agricultural behavior where the ants actively maintain and tend fungal gardens.

This species specifically cultivates clade 1 fungi, representing a relatively derived state within the Attini ^[2][3]. The phylogeny suggests M. camargoi is part of a clade with M. uncinata, and the genus is estimated to have diverged around 16.1 million years ago ^[2].

In captivity, providing proper fungal cultivation substrate is the biggest challenge. Unlike honey-feeding ants, these ants cannot survive on sugar water alone. They need a substrate that can support fungal growth. Some keepers have success offering small pieces of grass, leaves, or other plant material that the ants can use to start fungal cultures. However, the specific fungal requirements of M. camargoi are not well understood, and this represents the main challenge for successful captive husbandry.

Housing and Nesting

No established captive husbandry protocols exist for Myrmicocrypta camargoi, so keepers must adapt from related Attini species. Based on their natural history, they likely prefer soil-based nests in relatively humid conditions.

A naturalistic setup with a deep soil layer works well, this allows the ants to create chambers for their fungal gardens. The substrate should remain consistently moist but never waterlogged. A Y-tong or plaster nest with a soil chamber attached can also work.

Temperature should be maintained in the 24-28°C range, which is warm but manageable. A heating cable on one side of the nest creates a gradient allowing the ants to regulate their temperature. Humidity around 60-80% is appropriate, mist the nest occasionally and provide a water tube for drinking water.

Escape prevention is important though not as critical as with tiny ants, workers at 4-5mm are large enough that standard barriers like Fluon or tight-fitting lids are usually sufficient.

Challenges and Considerations

Myrmicocrypta camargoi represents a significant challenge for antkeepers. This species was only described in 2010 and remains among the least-studied Attini in captivity ^[1]. There is essentially no captive husbandry data available, meaning keepers are largely pioneering their care protocols.

The primary challenge is providing proper nutrition. As fungus-growers, they require substrate that can support fungal cultivation, this is far more complex than feeding typical ants. The specific fungal partner of M. camargoi may have particular requirements that are difficult to meet in captivity.

Growth rates are unknown but likely slow based on typical Attini patterns. Beginners may struggle with the patience required. Additionally, wild-caught colonies may carry parasites or pathogens from their native habitat that can cause problems in captivity.

For these reasons, M. camargoi is best suited for experienced antkeepers who are prepared to experiment with fungal cultivation and can commit to long-term colony maintenance without guaranteed success.

Frequently Asked Questions

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References