Carebara alperti

Carebara alperti

Carebara alperti is a tiny ant species from the Philippines and Malaysia. Workers measure just 2mm total length, making them one of the smaller ant species in the hobby. They have a distinctive appearance with a strongly convex (rounded) promesonotum, dark brown body, and notably possess eyes, a rare trait in the Carebara genus that typically shows reduced or absent eyes. Queens are significantly larger at 8.78mm and have well-developed wings. This species was described in 2010 from specimens collected in the Philippines and remains poorly studied in the wild. ^[1][2]

Quick Summary

• Difficulty: Unknown, Insufficient data for reliable difficulty assessment
• Origin & Habitat: Philippines (Negros Island) and Malaysia (Sabah) in the Indomalayan region. In the wild, specimens have been found in dead branches. ^[1][2][3]
• Colony Type: Colony structure is unconfirmed. Based on genus patterns, likely single-queen colonies, though this has not been directly documented for this species.
• Size & Growth:
  • Queen: 8.78mm total length (queen) ^[1]
  • Worker: 2.04mm total length (workers are extremely small) ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, no development data available
  • Development: Unknown, no direct measurements. Based on typical Carebara and small Myrmicinae patterns, estimate 4-8 weeks at tropical temperatures, but this is a rough guess. (No development studies exist for this species. Estimates based on genus-level patterns only.)
• Antkeeping:
  • Temperature: Unknown for this species. Based on their tropical Philippine origin, aim for warm conditions around 24-28°C. Monitor colony activity and adjust accordingly.
  • Humidity: Unknown, no specific data. Based on dead branch habitat, they likely prefer moderate humidity. Keep nest substrate slightly moist but not waterlogged.
  • Diapause: Unknown, no data on overwintering requirements. Given their tropical origin, they likely do not require a diapause period.
  • Nesting: In the wild, found in dead branches. In captivity, likely accept small test tubes, Y-tong nests, or plaster nests with tight chambers scaled to their tiny size. Avoid large, open spaces.
• Behavior: Behavior is unstudied in captivity. Based on genus patterns, they are likely secretive and slow-moving. Their tiny size means escape prevention is critical, they can squeeze through standard mesh barriers. They likely have a well-developed sting for their size, though the stinger is too small to penetrate human skin effectively. ^[1]
• Common Issues: escape prevention is critical due to their extremely small size, use fine mesh barriers, no captive care information exists, keepers must experiment with conditions, slow growth and small colony sizes may frustrate beginners expecting visible progress, wild-caught colonies may have parasites or diseases with no documented treatment, temperature and humidity requirements are unknown, start with tropical parameters and observe

Appearance and Identification

Carebara alperti workers are extremely small at just 2mm total length. They are dark brown with lighter brown appendages. The most distinctive feature is their strongly convex promesonotum (the middle body section is very rounded), this trait appears unique among Carebara species. They have small but visible eyes with just one ommatidium, which is unusual since many Carebara species have reduced or absent eyes. Their antennae have 11 segments with a 2-segmented club at the tip. Queens are much larger at nearly 9mm with full wings, while males reach about 6mm. ^[1]

Natural Distribution

This species is known only from the Philippines (specifically Negros Island) and Malaysia (Sabah). The type specimens were collected from Negros Oriental in the Philippines at the Horns of Negros, Camp Lookout area in 1948. A specimen was also found in Sabah, Malaysia. They inhabit the Indomalayan region, which is tropical. ^[1][2][3]

Natural Nesting Habits

In the wild, Carebara alperti has been found in dead branches. This suggests they are a xylophagous (wood-nesting) species that likely colonizes small cavities in rotting wood. They are not ground-nesting based on collection data. This matches typical Carebara behavior, as many species in this genus nest in decaying wood or under bark. ^[1][3]

Housing and Nest Setup

Since this species nests in dead branches in nature, captive setups should mimic this. Small test tubes work well for founding colonies. For established colonies, Y-tong nests or plaster nests with tight chambers scaled to their tiny size are appropriate. The chambers should be narrow, these are very small ants. Avoid large, open formicaria as they may feel exposed and stressed. Keep the nest setup in a quiet, dark location as they are likely secretive. ^[3]

Temperature and Humidity

Carebara alperti comes from tropical Philippines, so they need warm conditions. Aim for temperatures around 24-28°C. Since no specific humidity data exists, keep the nest substrate slightly moist, think of the conditions inside a rotting branch in a tropical forest. Allow for some variation so the ants can choose their preferred microclimate. Avoid temperatures below 20°C or conditions that would cause the nest to dry out completely. ^[3]

Feeding and Diet

The diet of Carebara alperti has not been documented. Based on genus patterns, they likely are omnivorous, accepting small insects, honeydew, and sugar sources. For such tiny ants, offer appropriately sized prey like fruit flies, pinhead crickets, or other small insects. Sugar water or honey can be offered occasionally. Start with small amounts and observe what they accept. Remove uneaten food promptly to prevent mold. ^[3]

Colony Development

No data exists on how fast Carebara alperti colonies develop. Queens are significantly larger than workers (8.78mm vs 2mm), which is typical for size polymorphism in this genus. Expect slow growth, small colonies of tiny ants typically develop slowly. The first workers (nanitics) will likely be smaller than mature workers. Patience is essential, as visible progress may take many months. ^[1]

Frequently Asked Questions

References