Cerapachys antennatus

Cerapachys antennatus

Cerapachys antennatus is a small, predatory ant species belonging to the Dorylinae subfamily. Workers are compact ants with distinctive morphological features including a smooth petiole without rugae and a unique torulo-posttorular complex with a small projecting tooth. The species was originally described from Borneo (Sarawak) by Frederick Smith in 1857,with the queen later described by Carlo Emery in 1887. This ant is part of the Cerapachyini tribe and is closely related to the genus Lioponera. The species has been recorded across the Indomalaya region, from northwestern India and Tibet through Middle China to Java and Borneo ^[1][2]. Unlike true army ants, this species is a non-army ant doryline that forms discrete colonies rather than the massive nomadic swarms characteristic of Eciton or Dorylus.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to Southeast Asia, specifically Borneo, Malaysia, and Indonesia. Found in the Indomalaya region, particularly in Sarawak (Borneo). This species inhabits tropical forest environments and is associated with rotting wood and forest floor microhabitats ^[1][2].
• Colony Type: Colony structure is not well documented in scientific literature. Based on related Cerapachys species studied in Thailand, colonies likely have synchronized brood development with a single functional queen. Further research needed to confirm monogyne or polygyne status ^[1].
• Size & Growth:
  • Queen: Estimated 6-8mm based on related Cerapachys species and queen description by Emery ^[3].
  • Worker: Estimated 3-5mm based on genus typical sizes ^[1].
  • Colony: Unknown for this specific species. Related Cerapachys species typically form colonies of several hundred workers.
  • Growth: Moderate, based on typical Dorylinae development patterns.
  • Development: Estimated 6-10 weeks based on related Dorylinae species at tropical temperatures. No specific study on C. antennatus development exists ^[1].
• Antkeeping:
  • Temperature: Keep at 24-28°C, reflecting their tropical Southeast Asian origin. A slight gradient allowing warmer and cooler areas is recommended. Room temperature in heated homes (around 24-26°C) typically falls within acceptable range.
  • Humidity: Moderate to high humidity (60-80%). These forest-floor ants prefer consistently moist substrate. Keep the nest substrate damp but not waterlogged, with some drier areas available for the ants to regulate their own moisture exposure.
  • Diapause: Unlikely, as a tropical species from Southeast Asia, they do not require hibernation. Keep at stable warm temperatures year-round.
  • Nesting: In captivity, they do well in Y-tong (AAC) nests or plaster nests with narrow chambers. In nature, they likely nest in rotting wood or soil cavities. Provide a nest with tight-fitting chambers scaled to their small size.
• Behavior: Cerapachys antennatus is a predatory ant that likely hunts small invertebrates. Workers are relatively active foragers. They are not aggressive toward keepers but may deliver a mild sting if handled roughly. Escape prevention is important due to their small size, use fine mesh barriers and tight-fitting lids. They are not known for extreme escape artist behavior but small ants can slip through surprisingly small gaps.
• Common Issues: limited availability in the antkeeping hobby, this species is rarely available, very limited biological data makes care recommendations somewhat speculative, predatory diet requirements may be challenging to meet consistently, small size requires attention to escape prevention, synchronized brood development means colonies may have periods of visible brood and periods with none

Housing and Nest Preferences

Cerapachys antennatus does well in Y-tong (acrylic) nests or plaster nests with appropriately sized chambers. The chambers should be scaled to their small worker size (3-5mm), so avoid overly large open spaces. A naturalistic setup with moist substrate and hiding spots can also work well. These ants are not particularly demanding about nest materials but do appreciate darkness in the nest area. Because they are small, ensure all connections and barriers are secure, even tiny gaps can allow escapes. A test tube setup can work for founding colonies, but be prepared to move them to a more permanent setup once the colony reaches 20-30 workers. ^[1]

Feeding and Diet

As a Dorylinae ant, Cerapachys antennatus is predatory and needs protein-rich food. Feed small live prey such as fruit flies, pinhead crickets, small mealworms, and other tiny arthropods. They likely accept dead prey as well, especially if moving. Based on related species behavior, they probably hunt small invertebrates in nature and may also scavenge. Sugar sources may be accepted occasionally but should not be a primary food source. Feed protein prey 2-3 times per week, adjusting based on colony size and consumption. Remove uneaten prey after 24-48 hours to prevent mold.

Temperature and Seasonal Care

Maintain temperatures between 24-28°C year-round. This species comes from tropical Southeast Asia and does not tolerate cool temperatures well. Room temperature in most homes is likely adequate, but in cooler climates you may need a small heating cable on one side of the nest to maintain warmth. Do not hibernate this species, they do not require a winter rest period. Stable temperatures are more important than exact numbers. Avoid temperature fluctuations and drafts. If workers seem sluggish or cluster together excessively, try increasing temperature slightly. ^[1]

Colony Development and Growth

Colony growth is likely moderate, with synchronized brood development observed in related Cerapachys species. This means you may see periods with lots of brood followed by periods with none, this is normal behavior, not a problem. The first workers (nanitics) will be smaller than mature workers. Expect 6-10 weeks from egg to first worker at optimal temperatures. Colonies likely reach several hundred workers over time, though exact maximum size is unknown for this species. Be patient, small predatory colonies grow more slowly than many common ant species. ^[1]

Behavior and Temperament

These ants are predatory and will hunt small prey. Workers are relatively active and will forage for food. They are not particularly aggressive toward humans but may sting if threatened or handled roughly. The sting is mild for most people. They are not known for forming supercolonies or exhibiting extreme aggression. Workers likely communicate through chemical trails and may use tandem running to recruit nestmates to food sources, similar to related Dorylinae species. Their small size makes them good escape risks, use fine mesh on any ventilation and check lid seals regularly.

Frequently Asked Questions

References