Tetraponera sirindhornae

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Southern Thailand (Trang Province, Palian District) near Khao Ting Cave (7°9'35"N,99°48'1"E). Found in an old rubber plantation near a stream, the surrounding area has since been developed for tourism ^[1].
• Colony Type: Single-queen colonies. The type colony contained one queen, about 100 workers, several males, and pupae. No alate queens were observed ^[1].
• Size & Growth:
  • Queen: 8.00 mm ^[1]
  • Worker: Majors 6.75-7.45 mm, Minors 4.23-4.95 mm ^[1]
  • Colony: Approximately 100 workers in the type colony, relatively small even at maturity ^[1]
  • Growth: Unknown, likely moderate based on typical Tetraponera patterns
  • Development: Unknown for this species. Based on related tropical Pseudomyrmecinae, expect 4-8 weeks at optimal temperature (Development is unconfirmed. Estimate is based on genus-level patterns for tropical arboreal ants)
• Antkeeping:
  • Temperature: Keep at 24-28°C year-round. This tropical ant from southern Thailand needs consistent warmth. A gentle gradient (one side slightly warmer) allows self-regulation ^[1].
  • Humidity: Moderate to high. The type locality was near a stream in a tropical plantation. Keep the nest substrate consistently moist but not waterlogged. Provide a gradient with a moist area and a drier area for the ants to choose from.
  • Diapause: No, as a tropical species, do not hibernate. Maintain warm conditions year-round ^[1].
  • Nesting: Arboreal. Use Y-tong (AAC) or plaster nests with horizontal chambers that mimic dead wood cavities. Avoid test tube setups, these arboreal ants prefer enclosed chambers. The nest should have a moisture source (e.g., damp cotton at one end) but also dry areas.
• Behavior: Arboreal and visually oriented. Workers are active foragers. Majors have a functional sting and may use it for defense, but the species is not known to be aggressive toward humans. Escape risk is moderate, they are under 8 mm and can slip through small gaps. Use standard escape prevention (fluon or oil barriers). They likely hunt small insects and collect honeydew in nature.
• Common Issues: extremely rare, no established captive breeding exists, obtaining a colony is nearly impossible., the only known habitat was destroyed by clear-cutting, so this species may be endangered in the wild ^[1]., arboreal nesting requirements differ from ground-nesting ants, test tube setups are not appropriate., no published captive husbandry protocols, keepers must experiment., small colony size (around 100 workers) makes colonies fragile and sensitive to disturbance ^[1].

Housing and Nest Setup

Tetraponera sirindhornae is an arboreal nester that lives in cavities inside dead branches and twigs. In captivity, Y-tong (AAC) or plaster nests with horizontal chambers work best. The original nest was in a dry rubber tree branch about 3 cm in diameter and 1.5 m long with a single cavity inside ^[1]. Mimic this by providing a nest with chambers approximately 8-10 mm high to accommodate majors up to 7.45 mm ^[1]. Connect the nest to a foraging outworld. Avoid test tube setups, these ants are adapted to enclosed wood cavities, not bare horizontal tubes. Provide a moisture gradient: keep one side of the nest slightly moist (damp cotton or a small water reservoir) and the other side dry so workers can self-regulate ^[2].

Feeding and Diet

Like other Tetraponera, this species is a generalist forager. Offer a constant source of sugar (honey water or sugar water diluted 1:10). For protein, provide small live prey such as fruit flies, pinhead crickets, or mealworm pieces. Majors can handle larger items (up to 3-4 mm) while minors take smaller prey. Since no captive feeding records exist, experiment with different prey sizes and observe which the colony accepts. Remove uneaten food after 24-48 hours to prevent mold. Feed every 2-3 days, adjusting based on consumption ^[2].

Temperature and Seasonal Care

As a tropical species from southern Thailand, this ant needs warm temperatures year-round. Keep the nest at 24-28°C. Create a slight gradient by placing a heating cable on one side of the nest (on top, not underneath, to avoid drying the substrate). Do not let the temperature drop below 22°C for extended periods. No diapause is needed, maintain warm conditions throughout the year ^[1].

Colony Structure and Caste System

This species has clear worker dimorphism: majors (6.75-7.45 mm) and minors (4.23-4.95 mm) ^[1]. The type colony had a 5:1 ratio of minors to majors, meaning minors are much more numerous ^[1]. Majors are distinguished by a truncate mandible profile, a small ocellus between the compound eyes, and larger overall size. Minors have normally shaped mandibles and no ocellus ^[1]. The queen (8.00 mm) resembles the major worker in mandible shape and sculpture ^[1]. This dimorphism likely allows specialization, majors may handle defense or other tasks requiring larger size ^[1].

Frequently Asked Questions

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References