Vollenhovia terayamai

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Eastern India (West Bengal), specifically Chapramari Wild Life Sanctuary at approximately 200 m elevation. The region features subtropical climate with dense forest cover ^[1].
• Colony Type: Unknown, colony structure has not been documented. The genus Vollenhovia contains both single-queen and multi-queen species, but no data exists for this specific species.
• Size & Growth:
  • Queen: Unknown, queen caste has not been described ^[1]
  • Worker: 2.30-2.42 mm total length ^[1]
  • Colony: Unknown, only two workers have ever been collected
  • Growth: Unknown
  • Development: Unconfirmed, no development data exists for this species (Based on related Vollenhovia species and small body size, development likely takes 4-8 weeks at warm temperatures, but this is an estimate only)
• Antkeeping:
  • Temperature: Unconfirmed, likely prefers warm conditions similar to other Indian Vollenhovia species. Start around 24-28 °C and observe colony activity. Related species from similar latitudes suggest room temperature (22-26 °C) is likely suitable.
  • Humidity: Unconfirmed, the Chapramari region experiences moderate to high humidity. Keep nest substrate lightly moist, similar to typical tropical forest-floor ants. Allow some drying between waterings.
  • Diapause: Unknown, no data on seasonal requirements. The collection date in July suggests they may be active year-round in their native habitat.
  • Nesting: Unconfirmed, no natural nesting observations exist. Related Vollenhovia species typically nest in soil, rotting wood, or under stones. Small test tubes or Y-tong nests with fine mesh would work for their tiny size.
• Behavior: Temperament is unconfirmed, no behavioral observations have been documented. Their small size (under 3 mm) means escape prevention must be excellent, as they can easily slip through standard barrier gaps. Related Vollenhovia species are generally non-aggressive and forage individually or in small groups. As a member of the Myrmicinae subfamily (tribe Crematogastrini), they have a modified stinger used to smear venom onto enemies rather than piercing them, this is a general trait of the tribe.
• Common Issues: almost no biological data exists, keepers will be pioneering captive breeding, tiny size makes escape likely without fine mesh barriers, queen caste undescribed, wild colony founding may be impossible until queens are discovered, no confirmed diet preferences, experimental feeding will be required, unknown whether they accept sugar sources or require only protein

Species Discovery and Rarity

Vollenhovia terayamai represents one of the most recently described and least-studied ant species in the antkeeping hobby. Scientists described it in 2023 based on only two worker specimens collected in 2015 from Chapramari Wild Life Sanctuary in West Bengal, India ^[1]. This means virtually no biological or ecological information exists in scientific literature, everything keepers learn will be new discovery.

The species was named in honor of Professor Mamoru Terayama for his contributions to ant systematics ^[1]. It can be distinguished from similar species like V. okinawana by having 6 teeth on its mandibles (versus 7), a well-developed knob-like subpetiolar process, and scattered punctures on the first gastral tergite ^[1]. For antkeepers, this rarity means you're entering uncharted territory, successful captive breeding would be a genuine scientific contribution.

Identification and Physical Characteristics

Workers are tiny at just 2.3-2.4 mm total length, making them one of the smaller ant species you'll encounter ^[1]. Their body is dark brown with lighter brown mandibles, antennae, and legs. The head is rectangular and longer than broad, with a distinctive broad smooth band running down the center from the clypeus to the back of the head ^[1][2].

They have 12-segmented antennae with a 3-segmented club at the tip, and large eyes positioned laterally below the mid-length of the head ^[1]. The mesosoma is trapezoidal in dorsal view, and the petiolar node is higher than it is long. Dense erect hairs cover the body, while appressed pubescence is sparse on the body but dense on antennae and appendages ^[1]. This tiny size means you'll need excellent magnification to examine them and fine mesh to prevent escapes.

As a member of the Myrmicinae (tribe Crematogastrini), this species has a modified stinger used to smear venom onto enemies rather than piercing them, a defense style known as “smearing.” This is general tribal knowledge, not specific to V. terayamai.

Housing and Escape Prevention

Given their extremely small size (under 3 mm), escape prevention is absolutely critical. Standard test tube setups may work, but you must use fine mesh barriers (nylon stocking material or very fine mesh) on any openings. Even tiny gaps that larger ants cannot pass through will allow these ants to escape.

For nesting, small test tubes with cotton barriers work as a starting point. The chamber size isn't critical since they're tiny, but ensure the water reservoir is properly sized, too much water can flood tiny setups. Y-tong style nests with narrow chambers also work well for species of this size. Since we have no confirmed nesting preferences, providing both a moist chamber and a slightly drier area allows the colony to choose.

Ventilation is important, avoid stagnant air but don't create excessive airflow that dries out the nest. A small hole or two in the lid, combined with the moisture from the water reservoir, typically provides adequate balance.

Feeding and Diet - Experimental

No specific dietary information exists for this species. Based on the genus Vollenhovia and related Myrmicinae, they likely forage for small insects, honeydew, and may accept sugar sources. However, this is inference rather than confirmed behavior.

Start with small live prey appropriate to their size, fruit flies, pinhead crickets, and small mealworms are good starting points. Offer sugar water or honey occasionally and observe whether they accept it. Since they're so small, prey items should be appropriately sized, anything larger than themselves will likely be ignored.

Feed small amounts every 2-3 days and remove uneaten prey to prevent mold. The experimental nature of this species' care means you'll need to document your observations carefully. What works and what doesn't will add to our limited knowledge of this species.

Temperature and Seasonal Care

No specific temperature data exists for this species. The type locality in West Bengal experiences subtropical to tropical conditions with warm temperatures year-round. Based on inference from other Vollenhovia species from similar latitudes, aim for temperatures in the 24-28 °C range.

Use a heating cable on one side of the nest to create a temperature gradient, allowing the colony to self-regulate. If you notice workers clustering near the heat, increase slightly, if they avoid it, reduce. Room temperature in most homes (22-26 °C) may be suitable as a starting point.

Diapause requirements are completely unknown. The single collection date in July suggests year-round activity in their native habitat, but this is not confirmed data. Until more information becomes available, maintaining stable warm conditions year-round is the most cautious approach.

Frequently Asked Questions

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References