Cephalotes auricomus

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Hispaniola island, Dominican Republic and Haiti. Found in lowland moist forests at elevations of 185-720 m, nesting in dead branches of standing trees ^[4][5].
• Colony Type: Likely monogyne, a single documented nest contained one queen with close to 500 workers and around 200 alates (including 24 gynes and 151 males) ^[4][5]. The hamulus group lacks soldiers ^[3].
• Size & Growth:
  • Queen: 9.78-10.00 mm ^[2]
  • Worker: 5.72-7.04 mm ^[1][2]
  • Colony: Up to ~500 workers in established colonies ^[4][5]
  • Growth: Moderate
  • Development: 6-10 weeks (estimated, no specific study for this species, based on typical tropical Cephalotes) (Development time is an estimate. Keep at warm temperatures to support brood growth.)
• Antkeeping:
  • Temperature: Keep warm at 24-28°C. Avoid drops below 20°C. A slight gradient with a cooler area at 22°C is fine ^[4][5].
  • Humidity: Keep the nest substrate consistently moist but not waterlogged. These ants come from moist forests, so provide a damp substrate. Balance with ventilation to prevent mold ^[4][5].
  • Diapause: No, this is a tropical species. Maintain warm conditions year-round ^[4][5].
  • Nesting: Arboreal species. Provide wood, cork, or Y-tong nests with horizontal chambers that mimic natural twig cavities. Test tubes can work if positioned horizontally. Avoid vertical setups.
• Behavior: Docile and slow-moving. They have a functional stinger but it is not medically significant to humans (typical of the Attini tribe). Workers are diurnal foragers that establish trail networks between trees and recruit nestmates to food ^[4][5]. They are occasionally found on the ground when trails cross from one tree to another. Escape risk is moderate, they can climb smooth surfaces, use standard barriers.
• Common Issues: consistent warmth needed, cold temperatures will slow or stop development, arboreal nesting requires appropriate horizontal chambers, avoid vertical setups, slow colony growth, established colonies reach ~500 workers, be patient, high humidity needs balanced with ventilation to prevent mold, wild-caught colonies often carry Wolbachia (common in this genus), generally harmless ^[6][7]

Nest Preferences and Housing

Cephalotes auricomus nests naturally in small chambers inside dead twigs and branches that are still attached to living trees ^[4][5]. In captivity, they do best in nests that mimic these conditions, horizontal or slightly angled chambers that simulate hollow twigs. Wooden formicaria, cork nests, or Y-tong blocks with narrow, horizontal chambers are ideal. The chambers should be snug for the workers, as they prefer tight spaces matching their natural cavities. Test tubes can work if positioned horizontally, but dedicated arboreal nests are better. Provide a spacious outworld for foraging since these ants are active day foragers that establish trail networks ^[4][5].

Feeding and Diet

Like other Cephalotes species, these ants are omnivorous with a strong preference for carbohydrates. They naturally forage for honeydew from sap-sucking insects ^[4][5]. In captivity, offer sugar water (honey or sucrose solution) as a constant staple. They also accept small insects like fruit flies, small crickets, and mealworms. Offer protein sources 2-3 times per week. They are relatively slow-moving and may not compete well for live prey with faster ants. Their recruitment behavior means that once food is discovered, workers will bring nestmates, place food in accessible locations in the outworld ^[4][5].

Temperature and Seasonal Care

As a tropical Caribbean species, Cephalotes auricomus needs warm temperatures year-round. Keep the nest area at 24-28°C for optimal brood development ^[4][5]. A slight gradient is beneficial, around 22°C in cooler areas and up to 28°C in warmer zones. Room temperature may work if your home stays in the low-to-mid 20s. Use a heating cable on one side if needed (placed on top of the nest to avoid drying out the substrate). Unlike temperate species, they do not require a winter diapause. Maintain consistent warmth throughout the year, temperatures below 20°C can slow development significantly.

Behavior and Colony Dynamics

This species appears to form single-queen colonies, a documented nest contained one queen and close to 500 workers with a male-biased sex ratio of about 10 males per queen ^[2][4][5]. The hamulus group (including C. auricomus) lacks soldiers, all workers are the same size and there is no major/minor caste differentiation ^[3]. Workers are diurnal foragers that establish trail networks between trees and across branches ^[4][5]. They recruit nestmates to food sources. Workers are occasionally found on the ground when trails connect different trees. The ants are docile and rely on their armored appearance and a functional stinger for defense (stinger not medically significant).

Humidity and Water Requirements

Coming from moist lowland forests, Cephalotes auricomus requires high humidity. Keep the nest substrate consistently moist but avoid waterlogging, the substrate should feel damp but not have standing water ^[4][5]. Rehydrate based on condensation and substrate moisture rather than a fixed schedule. In wooden or cork nests, you may need to mist occasionally or provide a water tube. In Y-tong nests, a water reservoir works well. Balance humidity with adequate ventilation to prevent mold. Their natural nest chambers are small, which helps maintain local humidity, using tight-fitting nest lids can help replicate this.

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