Myrmicaria carinata - "Hunch Back Ant"
Myrmicaria carinata, often referred to as the Hunch Back Ant, is a fascinating ant species known for its distinctive body shape, featuring a down-curved abdomen and prominent spines on its thorax. While specimens within the same colony show little variation, there can be considerable size differences between colonies, with older and larger colonies potentially producing larger workers. These ants are semi-arboreal, typically nesting underground but frequently foraging on plants and trees. They are also noted for their strong mandibles and their ability to spray acid as a defense mechanism, a truly unique sight in the ant world.
- Difficulty: Medium
- Origin & Habitat: Southeast Asia (Borneo, Brunei Darussalam, Indonesia, Malaysia, India) in Lowland dipterocarp forests, dense forests, semi-arboreal, underground nests, frequenting plants and trees..
- Colony Type: Monogyne or Polygyne, claustral founding.
- Size & Growth:
- Queen: 12-14mm
- Worker: 4-8mm
- Colony: Large (up to 10,000 workers). Medium (slow initially, then faster) growth.
- Antkeeping:
- Temperature: Nest part: 21-24°C, Arena: 24-28°C. Can handle up to 26°C, but long-term deviations can affect lifespan..
- Humidity: Nest part: 50-70%, Arena: 50-90%. They prefer tropical conditions, ideally between 60-85%. Providing a dry tube and a moist tube allows them to choose..
- Diapause: Not required. Not specified at Not specified.
- Nesting: They build nests in soil, rotten wood, or at the base of trees. In captivity, solid plaster or reinforced aerated concrete nests are recommended as they are diggers and can chew through weaker materials..
- Behavior: Medium (towards prey and competitors, uses chemical defense) aggressiveness.
- Common Issues: Queen stress during founding, Mold in nest due to high humidity, Colony stalling if conditions are not met, Escape if nest material is not solid enough (they are diggers), Humidity fluctuations.
One of the most captivating aspects of Myrmicaria carinata is their unique defensive posture. When threatened, these ants will dramatically raise their gaster and can spray a chemical defense. This behavior is quite a spectacle to behold and is a hallmark of the Myrmicaria genus. While generally harmless to humans, this chemical spray can be quite effective against other insects, making them formidable in their natural environment. Observing this behavior in your colony adds an extra layer of intrigue to their care.
Myrmicaria carinata are known for their active and dynamic foraging behavior. They are predatory ants with tactical hunting skills, often engaging in organized raids to take down live prey. This species exhibits excellent recruitment, quickly mobilizing their nestmates when food is found. Keeping these ants in a setup with a good-sized outworld will allow you to observe their impressive foraging strategies and cooperative behaviors, which are truly a highlight for any antkeeper. They are constantly on the move, making for an engaging display.
Colony growth with Myrmicaria carinata can be a bit of a test of patience, especially during the initial founding phase. While queens are claustral and can establish a colony without external feeding, this is a very sensitive period. Stress, vibrations, or too much light can cause the queen to abandon or even consume her brood. However, once the first workers (nanitics) emerge, the colony typically picks up its growth pace. The queen's role as a primary caregiver is especially pronounced in the early stages, meticulously tending to her eggs and larvae before the workers take over most of the care duties.
These ants are quite adaptable but do have specific environmental needs, particularly regarding humidity. Providing a gradient of humidity, perhaps with a dry and a moist section within their nest setup, allows the colony to self-regulate and choose the most suitable conditions for their brood and overall well-being. Ensuring proper ventilation in their habitat is also crucial to prevent mold and maintain a healthy environment for your colony. Their resilience, despite specific humidity needs, makes them a rewarding species for experienced keepers.
Myrmicaria carinata exhibit a fascinating blend of features. While generally considered monomorphic, meaning workers don't have distinct size castes like majors or minors, there can be considerable size variation among workers within larger, older colonies, often linked to the division of labor. This subtle polymorphism adds to the observational interest of the colony. Their diet is quite varied, consuming both sugary liquids like honey water and a range of insects, and even small bits of raw meat, reflecting their omnivorous nature in the wild.
