Stigmatomma reclinatum

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Southeast Asia, Indonesia, Philippines, Thailand, Malaysia, Singapore, and India's Western Ghats. Found in leaf litter and soil at the bases of trees in primary and mature secondary forests ^[4]. They nest in soil ^[2][5].
• Colony Type: Queenless colonies with gamergates (mated reproductive workers). Multiple gamergates per colony (average 6±5), forming a functional polygyny ^[3]. Average colony size is around 100 workers ^[3][6][7].
• Size & Growth:
  • Queen: N/A, this species has no winged queens, reproduction is via gamergates ^[3]
  • Worker: 8-8.5 mm ^[2]
  • Colony: Around 100 workers ^[3][6][7]
  • Growth: Moderate
  • Development: Unknown, specific development data not available (No direct measurements exist. Based on related Amblyoponinae species, development likely takes several months. This is an estimate inferred from genus‑level patterns.)
• Antkeeping:
  • Temperature: Tropical species, keep around 24-28 °C. They come from warm, humid Southeast Asian forests ^[1]. Use a heating cable on one side of the nest, placed on top to avoid drying out the substrate.
  • Humidity: High humidity required, think damp forest floor. Keep the substrate consistently moist but not waterlogged ^[4].
  • Diapause: No, being a tropical species, they do not require hibernation ^[1]. Maintain warm conditions year‑round.
  • Nesting: Soil‑nesting species. A naturalistic setup with moist soil or a plaster/Y‑tong (AAC) nest with a soil chamber works well. They prefer dark, humid nest conditions.
• Behavior: Predatory ants that hunt centipedes and other small arthropods ^[6][8]. Workers forage solitarily for small prey, but when they encounter large prey they sting it to paralyze it, then return to the nest leaving a trail pheromone from their hindleg footprint glands to recruit nestmates for group retrieval ^[6][9]. They have a potent sting and should be handled with care. Escape risk is moderate, their 8 mm size means standard barrier methods work well.
• Common Issues: gamergate colonies are harder to establish than queen‑founded colonies, you need an established colony with reproductive workers, tropical species requires constant warmth, cold temperatures will slow or stop brood development, predatory diet means they need live prey, they will not accept sugar water or seed‑based foods, small colony sizes mean slower growth and less forgiving of mistakes, high humidity needs can lead to mold if ventilation is poor

Understanding Gamergate Reproduction

Stigmatomma reclinatum is one of the few ant species where the queen caste has been lost entirely. Instead, reproduction is handled by gamergates, workers that become reproductive and mate with males to lay fertilized eggs ^[3]. This is called queenless reproduction. Colonies typically have 6±5 gamergates working together (functional polygyny) ^[3]. For antkeepers, this means you cannot start a colony from a single founding queen. You would need to acquire an established colony with existing gamergates. The colony propagates through budding or fissioning, where some workers and gamergates leave to form a new colony ^[5]. This is fundamentally different from keeping most ant species and is a key consideration before purchasing.

Feeding and Diet

These are specialized predators. In the wild, their diet consists primarily of centipedes ^[6][8]. They are not scavengers or sugar‑seekers, they actively hunt live prey. Workers forage alone for small prey, carrying it back to the nest. When they encounter larger prey that cannot be carried alone, the scout stings it to paralyze it, then returns to the nest leaving a trail pheromone from specialized footprint glands in their hindlegs ^[6]. The number of workers recruited is proportional to the size of the prey ^[6]. In captivity, they can be raised on Tenebrio molitor (mealworm) larvae ^[6]. Workers also lay trophic eggs (non‑viable eggs) that are fed to the brood ^[10]. Offer small live prey regularly. They will not accept sugar water or honey.

Unique Recruitment System

Stigmatomma reclinatum has one of the most unusual recruitment systems in the ant world. The species has specialized footprint glands in their hindlegs that produce trail pheromones, this gland is actually unique to the genus Amblyopone (now Stigmatomma) ^[6]. When a scout finds large prey, it paralyzes the prey with its sting, then quickly returns to the nest without attempting to carry the prey. On the way back, it deposits trail pheromone by performing a peculiar stepping behaviour where the hindleg pretarsus twists to briefly touch the substrate, leaving discontinuous marks rather than a continuous line ^[6]. Recruited nestmates follow this trail and jointly drag the prey back to the nest ^[6]. This elegant system allows them to tackle prey much larger than any individual worker could handle.

Temperature and Care

As a tropical Southeast Asian species, Stigmatomma reclinatum requires warm, humid conditions year‑round. Keep the nest area at 24-28 °C, this is warmer than most room temperatures in temperate climates. A heating cable or mat on one side of the nest can help maintain these temperatures, but place it on top of the nest rather than underneath to avoid drying out the substrate. They are adapted to the warm, humid conditions of tropical forests and will not tolerate cool temperatures ^[1]. Unlike temperate species, they do not require any winter dormancy or diapause period ^[1]. Maintain consistent warmth throughout the year.

Nesting and Setup

In the wild, these ants nest in soil, typically between roots at the base of large trees ^[2]. They prefer dark, humid underground conditions. For captivity, a naturalistic setup with moist soil works well, or you can use a plaster or Y‑tong (AAC) nest with a soil chamber. They are not arboreal and do not need vertical space. The nest should be kept humid but with some ventilation to prevent mold. Because they are predatory and need live prey, the outworld (foraging area) should be simple and easy to clean. Test tubes can work for small colonies but will need upgrading as the colony grows.

Frequently Asked Questions

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References