Rogeria brunnea

Quick Summary

• Difficulty: Very difficult, almost no captive care data exists
• Origin & Habitat: Caribbean islands: Cuba, Dominican Republic, and Bahamas ^[1]. Found in dry forest and semideciduous forest habitats ^[2][3].
• Colony Type: Unknown, colony structure has not been documented
• Size & Growth:
  • Queen: 2.8-3.4mm total length ^[1]
  • Worker: 2.3-3.3mm total length ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown
  • Development: Unknown, no development data exists for this species (No direct observations of colony development. Any timeline would be purely speculative.)
• Antkeeping:
  • Temperature: Likely 22-28°C based on Caribbean dry forest habitat ^[2][3]. Provide a gentle gradient so ants can self-regulate.
  • Humidity: Low to moderate, these ants come from seasonally dry forests. Keep the nest substrate lightly moist in one area and allow other parts to dry out completely.
  • Diapause: Unknown, Caribbean species may have reduced activity during dry seasons rather than true hibernation
  • Nesting: No specific nesting data exists. For captivity, use small test tubes or Y-tong/plaster nests with tight chambers scaled to their tiny size. Avoid acrylic nests. Fine mesh is essential for escape prevention.
• Behavior: No specific behavioral studies exist. As tiny Myrmicinae with a stinger, they likely forage individually on the ground and may defend the nest if threatened ^[1]. Their small size (2-3mm) makes escape risk high, use very fine mesh barriers.
• Common Issues: escape risk due to tiny size, they can slip through standard mesh barriers, no captive care data, expect high risk of colony failure and be prepared for trial and error, feeding is unknown, may refuse offered foods, start with small live prey (fruit flies, springtails) and sugar water, queen-worker association not confirmed, some queens were collected as strays, so colony structure may be unusual, males have never been collected, timing of nuptial flights is completely unknown ^[1]

Appearance and Identification

Workers are tiny,2.3-3.3mm in total length, and brown to yellowish-brown with noticeably lighter yellowish legs and antennae ^[1]. Queens are slightly larger at 2.8-3.4mm ^[1]. This species has two distinct worker size ranges, but the reason for this is unknown. The genus Rogeria can be identified by their five-toothed mandibles and the shape of the face plate above the mouth. As members of the tribe Solenopsidini, they have a functional stinger, though it is likely too small to be felt by humans.

Distribution and Habitat

This species is endemic to the Greater Antilles: known only from Cuba, the Dominican Republic, and the Bahamas ^[1][4]. In Cuba, specimens have been collected from various locations including Pinar del Río Province, Soledad, Havana Province, and Sierra Maestra ^[1]. In the Dominican Republic, they have been found in dry forest in Jaragua National Park and other areas ^[2][5]. Their habitat consists of dry forest and semideciduous forest ^[2][3]. Most records come from scattered museum specimens, systematic surveys are lacking.

Temperature and Care

Since this ant comes from the Caribbean dry forest, they likely prefer warmer temperatures. Aim for 22-28°C with a gentle gradient in the nest so workers can move to their preferred spot ^[2][3]. Humidity should be low to moderate, keep the nest substrate lightly moist in one corner but let other areas dry out completely. Overly wet conditions are likely to cause mold and stress. For nest type, use small test tubes or Y-tong/plaster nests with very tight chambers. Their tiny size means escape prevention is critical, use fine mesh (0.5mm or smaller) on all outworld openings.

Feeding and Diet

No specific dietary studies exist for this species. As a member of the Solenopsidini tribe, it may accept small live prey and sugar sources. For captive care, start with small fruit flies, springtails, or pinhead crickets, along with a drop of sugar water. Offer variety and remove uneaten food after 24 hours. Acceptance is uncertain, so be prepared to try different options.

Behavior and Temperament

No detailed observations have been documented. As tiny ants with a stinger, they may be defensive if the nest is disturbed, but their sting is unlikely to be painful. Workers probably forage individually. Their tiny size makes escape risk high, use very fine mesh and seal all gaps. Activity may be reduced during dry seasons, but this is speculation.

Colony Development

This is one of the least studied ant species in the hobby. Males have never been collected, which suggests that reproductive timing or behavior is unusual ^[1]. Queens have been collected as strays, so the association between a queen and her worker colony is not confirmed ^[1]. No data exists on founding type, egg-to-worker timeline, or colony growth rate. Captive attempts should be considered experimental.

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