Carebara trechideros

Carebara trechideros

Carebara trechideros is a small ant species formerly known as Carebara trechideros, found across southern China, northern Thailand, and Vietnam. Workers are tiny, with major workers (soldiers) having a coarsely striate head and body, and short propodeal spines that curve forward ^[1]. This species inhabits warm subtropical to tropical regions, nesting in soil, under rotten wood, and occasionally on the ground surface ^[2]. Like other Carebara species, they are ground-nesting ants that forage on the soil surface.

Quick Summary

• Difficulty: Unknown, limited captive breeding data available
• Origin & Habitat: Southern China (Guangxi, Guangdong, Yunnan, Sichuan), northern Thailand (Doi Ang Khang, Doi Inthanon), and Vietnam. Inhabits Masson pine forests and subtropical evergreen broadleaved forests at elevations around 500-600m ^[2][3].
• Colony Type: Colony structure is unconfirmed. The genus Carebara typically forms colonies with one queen (monogyne), though some species can have multiple queens. Major and minor worker castes are present.
• Size & Growth:
  • Queen: Estimated 5-7mm based on genus Carebara patterns
  • Worker: Minor workers: 2-3mm, Major workers (soldiers): 4-6mm ^[1]
  • Colony: Unknown for this specific species. Related Carebara species typically form colonies of several hundred to a few thousand workers.
  • Growth: Unknown, likely moderate based on genus patterns
  • Development: Estimated 6-8 weeks at tropical temperatures (25-28°C) based on related species (Direct development data unavailable for this species. Estimates based on typical Carebara genus development patterns.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. This species comes from warm subtropical regions in southern China and northern Thailand ^[3][4].
  • Humidity: Moderate humidity (50-70%). They nest in soil and under rotting wood in forest habitats, so the substrate should remain slightly moist but not waterlogged ^[2].
  • Diapause: Likely no true diapause required. The species inhabits relatively warm regions year-round, though Sichuan populations at higher elevations may experience cooler winters.
  • Nesting: Use a naturalistic setup with soil or a Y-tong/plaster nest. They nest under rotten wood and in soil in the wild ^[2]. Provide damp substrate they can tunnel into.
• Behavior: This is a ground-nesting ant that forages on the soil surface. They are likely nocturnal or crepuscular foragers based on typical Carebara behavior. Major workers (soldiers) guard the nest and may help process larger prey. Their small size makes them capable of escaping through tiny gaps, use fine mesh barriers. Temperament is likely defensive when threatened, using their minor workers for foraging and majors for defense.
• Common Issues: escape prevention is critical due to their tiny size, they can squeeze through standard test tube cotton, limited information on captive breeding success makes this a species for experienced keepers, slow colony growth typical of tiny ant species may frustrate beginners, humidity control is important, too dry causes desiccation, too wet causes mold, wild-caught colonies may have parasites that are difficult to treat

Distribution and Natural Habitat

Carebara trechideros is found across southern China, including Guangxi, Guangdong, Yunnan, Sichuan, Hunan, Jiangxi, and Taiwan provinces ^[4]. In Thailand, they inhabit northern highland areas around Chiang Mai (Doi Ang Khang, Doi Inthanon) ^[3]. Vietnamese populations are documented in several protected areas including Chua Yen Tu, Pu Mat, and Tay Yen Tu ^[5]. In Sichuan's Wanglang Nature Reserve, they were found exclusively in Masson pine forests at around 574m elevation, showing narrow ecological adaptation ^[2]. They nest under rotten wood, in soil, and occasionally on the ground surface, with foraging occurring primarily on the ground ^[2].

Identification and Morphology

This species is distinguished by its coarsely striate head and body in major workers, and short propodeal spines that are laterally compressed and curve forward ^[1][4]. The mandibles have longitudinal striations on the base when viewed head-on, and the spaces between head striations are punctured ^[4]. Like other Carebara species, they exhibit polymorphism, major workers (soldiers) are significantly larger than minor workers. Major workers measure approximately 4-6mm while minor workers are 2-3mm ^[1]. The propodeal spines are notably short, less than one-third the distance between their bases ^[1].

Nest Preferences and Housing

In the wild, Carebara trechideros nests in soil and under rotting wood, with colonies found at ground level in forested areas ^[2]. For captive care, a naturalistic setup with a soil chamber works well, as this allows them to exhibit natural tunneling behavior. Alternatively, a Y-tong or plaster nest with damp substrate provides good humidity control. The nest should have chambers scaled to their tiny size, narrow passages and small chambers appropriate for 2-3mm workers. Since they are ground-nesting ants, ensure the substrate remains consistently moist but not waterlogged. A water reservoir connected to the nest helps maintain humidity.

Temperature and Care Requirements

Based on their distribution in warm subtropical regions of southern China and northern Thailand, maintain temperatures between 24-28°C ^[3][4]. This species likely does not require a true diapause period given their tropical to subtropical range, though Sichuan populations at higher elevations may experience cooler seasonal temperatures. Room temperature within this range is acceptable. Use a heating cable on one side of the nest if needed to maintain warmth, placing it on top of the nest to avoid evaporating moisture from below. Monitor colony activity, workers should be active and foraging throughout the nest area.

Feeding and Diet

While specific dietary studies for Carebara trechideros are lacking, Carebara species are typically omnivorous, feeding on small insects, honeydew, and plant secretions. In captivity, offer small live prey such as fruit flies, pinhead crickets, and mealworms. They will likely accept sugar water or honey as an energy source. Feed small amounts of protein (insects) 2-3 times per week, and provide constant access to sugar sources. Remove uneaten prey after 24 hours to prevent mold. Their tiny size means even small prey items are substantial meals for minor workers.

Behavior and Temperament

Carebara trechideros is a ground-nesting species that forages on the soil surface ^[2]. Like other Carebara species, they likely exhibit nocturnal or crepuscular foraging patterns to avoid predators. Colonies contain both major and minor worker castes, majors (soldiers) typically guard the nest and help process larger prey items, while minors handle foraging and brood care. Their small size makes them excellent at accessing tiny food sources but also creates significant escape risk. Use fluon barriers and fine mesh (0.5mm or smaller) on all openings. When disturbed, majors may display defensive behavior while minors retreat with brood.

Frequently Asked Questions

References