Bazboltonia microps

Bazboltonia microps

Bazboltonia microps is a tiny subterranean ant native to the Neotropical region, ranging from Costa Rica down through Brazil, Colombia, and into northern Argentina. Workers measure just 2.39-3.39mm and are yellowish-ferruginous in color with notably reduced eyes, a trait giving them their species name 'microps' meaning small eyes. The genus Bazboltonia was only established in 2022 as a replacement name for the preoccupied Boltonia, making this a relatively newly recognized genus ^[1]. These ants belong to the subfamily Ectatomminae and are considered hypogaeic, meaning they live primarily underground or within leaf litter rather than building visible nests on the surface ^[2]. Colonies contain some dozens to a few hundred workers, making them a modest-sized colony species ^[3].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Neotropical region, found across Brazil, Colombia, Costa Rica, French Guiana, Paraguay, Venezuela, and recently Argentina. Inhabits altitudes from 1-2700m, commonly in Atlantic Forest and cloud forest habitats. Nests in soil and leaf litter ^[3][4].
• Colony Type: Colony structure is unconfirmed. Based on related Heteroponerini patterns, likely single-queen colonies. Some species in this tribe have ergatoid (wingless) queens that can serve as replacement reproductives, but this hasn't been specifically documented for B. microps ^[3].
• Size & Growth:
  • Queen: Undescribed in scientific literature, estimated 4-5mm based on genus patterns
  • Worker: 2.39-3.39mm ^[3]
  • Colony: Some dozens to few hundred workers ^[3]
  • Growth: Unknown, likely moderate based on small colony size
  • Development: Unconfirmed, estimated 6-10 weeks based on related Ectatomminae species (No direct development data exists for this species. Estimates based on typical patterns for small tropical poneromorph ants.)
• Antkeeping:
  • Temperature: Keep at 22-26°C. Given their broad Neotropical distribution from sea level to 2700m, they likely tolerate a range. Start in the mid-range and observe colony activity ^[4].
  • Humidity: High humidity required, these are subterranean forest floor ants. Keep the nest substrate consistently moist but not waterlogged. Provide a gradient with slightly drier areas for workers to self-regulate ^[3][5].
  • Diapause: Unlikely, as a tropical/subtropical species, they probably do not require true hibernation. However, slight seasonal slowdown may occur in cooler months ^[4].
  • Nesting: Use a naturalistic setup with moist substrate (soil/soil mix) or a Y-tong/plaster nest with chambers scaled to their tiny 2-3mm size. They prefer confined spaces and will likely nest in the substrate rather than on artificial surfaces. Provide leaf litter or debris on the outworld to simulate their natural leaf-litter environment ^[3][6].
• Behavior: These ants are predatory, classified as litter generalist predators. Workers forage on the soil surface and within leaf litter, hunting small invertebrates. They have a functional stinger, though it's very small (0.03mm² surface area) ^[7]. Temperament is likely defensive, Poneromorph ants typically respond to threats with stinging. Escape risk is moderate due to their small size, ensure enclosures have no gaps. Activity level appears low to moderate, they are not particularly aggressive foragers but maintain consistent colony activity ^[6][3].
• Common Issues: tiny size makes escape prevention critical, they can squeeze through very small gaps, diet is poorly understood, may refuse standard ant foods, subterranean lifestyle means they may be rarely visible, leading keepers to overcheck the nest, high humidity requirements can lead to mold if ventilation is poor, wild-caught colonies may have parasites that are difficult to treat

Housing and Nest Setup

Bazboltonia microps is a tiny subterranean ant that requires careful housing. Given their worker size of just 2.39-3.39mm, use nests with very small chambers and narrow passages. A Y-tong (acrylic) nest or plaster nest works well, the chambers should be sized appropriately for their small stature. Alternatively, a naturalistic setup with a soil/soil-mix substrate allows them to create their own tunnels, which better matches their natural behavior of nesting in soil and vegetation ^[3]. The outworld should include leaf litter, small pieces of bark, or other debris to simulate their natural leaf-litter environment. Because they are hypogaeic (subterranean), they prefer dark, humid spaces and may not venture onto bright outworlds often. Keep the nest area consistently moist but ensure some drier areas exist so workers can self-regulate humidity.

Feeding and Diet

This species is classified as a litter generalist predator, meaning they hunt small invertebrates in the leaf litter layer ^[6]. Their diet in the wild consists of tiny arthropods. In captivity, offer small live prey appropriate to their size, wingless fruit flies (Drosophila), small mealworms, micro-crickets, and similar tiny insects work well. The stinger is very small (0.03mm² surface area), suggesting they target equally small prey ^[7]. Sugar sources are not likely a significant part of their diet, while you can offer a drop of honey or sugar water occasionally, do not rely on it as a primary food source. Feed protein prey 2-3 times per week, adjusting based on colony consumption. Remove uneaten prey after 24-48 hours to prevent mold.

Temperature and Humidity

Bazboltonia microps has one of the broadest distributions in the genus, ranging from Costa Rica to Argentina at altitudes from 1-2700m ^[4]. This suggests they can tolerate a range of conditions. Start with temperatures in the 22-26°C range, room temperature in most homes falls within this band. If workers seem sluggish, slightly increase warmth, if they avoid the heated area, reduce it. Humidity is more critical, these are forest floor ants that need consistently moist substrate. Keep the nest substrate damp to the touch but not standing with water. Poor ventilation combined with high humidity causes mold, so ensure adequate airflow while maintaining moisture. A small water reservoir connected to the nest helps maintain humidity stability.

Behavior and Temperament

As a Poneromorph ant, B. microps has a functional stinger and will use it if threatened ^[7]. However, their small size means the sting is likely negligible to humans. Workers forage on the soil surface and within leaf litter, hunting small prey rather than scavenging broadly. They are not aggressive toward humans but will defend their nest if disturbed. Colonies are relatively small (some dozens to a few hundred workers), so they won't produce the massive foraging swarms seen in larger species. Their subterranean lifestyle means you may not see much activity on the outworld, this is normal, not a sign of problems. The reduced eyes are a characteristic feature of this species, adapted to their dim, leaf-litter environment ^[3][8].

Colony Establishment

Establishing a colony of Bazboltonia microps requires patience. Since founding behavior hasn't been directly studied, assume claustral founding like most Ectatomminae, the queen seals herself in a chamber and lives off stored fat until her first workers emerge. Provide a founding setup with moist substrate and no food (the claustral queen doesn't forage). Once the first nanitic workers appear (likely 6-10 weeks based on related species), begin offering tiny prey. Growth is slow, small colonies of some dozens to a few hundred workers take time to build. Avoid the temptation to overfeed or overcheck the nest during founding, as disturbance can cause queen abandonment. Wild-caught colonies may carry parasites common to leaf-litter ants, quarantine and observe new colonies carefully. ^[3]

Frequently Asked Questions

References