Plagiolepis squamulosa

Plagiolepis squamulosa

Plagiolepis squamulosa is a tiny ant species native to Western Australia. Workers measure just 1.5-2.5mm, making them one of the smaller ant species you'll encounter ^[1]. They have a dark brown coloration with the head being darker than the thorax, and the gaster slightly lighter. Their body surface appears finely squamulate (covered in tiny scale-like patterns) under magnification. These ants were first described from specimens found under stones at sand dunes south of Geraldton, Western Australia ^[1]. A notable trait of this species is the presence of replete workers, special workers that store liquid food in their distended abdomens, similar to honey ants ^[2].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Western Australia, specifically found in the Geraldton region and Rottnest Island. In nature, they nest under stones in sandy areas and have a wider distribution in southern Western Australia ^[2][1].
• Colony Type: Likely single-queen colonies based on typical Plagiolepis patterns. Colonies contain replete workers that store liquid food ^[2].
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Unknown, not described in available literature
  • Worker: 1.5-2.5mm ^[1]
  • Colony: Unknown, likely small to moderate colonies based on related species
  • Growth: Unknown, likely moderate based on small worker size
  • Development: Estimated 6-10 weeks based on related Formicinae species at optimal temperature (Direct development data not available for this species. Estimate based on genus-level patterns for small Plagiolepis species.)
• Antkeeping:
  • Temperature: Keep at room temperature around 20-24°C. A gentle gradient allowing them to choose their preferred warmth is ideal.
  • Humidity: Moderate humidity. These ants come from semi-arid coastal areas of Western Australia, so aim for substrate that is dry to slightly moist but not wet.
  • Diapause: Likely required, Western Australian temperate species typically need a winter rest period. Reduce temperature to around 15°C for 2-3 months.
  • Nesting: Small chambers work best for their tiny size. Y-tong nests or small acrylic setups with tight passages prevent escapes. They do well in naturalistic setups with sand substrate and stones.
• Behavior: These are peaceful, small ants that are not aggressive. Workers are active foragers but due to their tiny size, they pose no sting threat to humans. The main concern for keepers is escape prevention, their small size means they can squeeze through standard barriers. They readily accept sugar sources and small prey items.
• Common Issues: escape prevention is critical, their tiny 1.5mm size means they can slip through standard mesh and gaps, colonies grow slowly, which can frustrate beginners expecting rapid development, replete workers may die if the colony is disturbed too much during founding, humidity control is important, too wet causes fungal issues, too dry stresses the colony, wild-caught colonies may have parasites that affect captive survival

Housing and Escape Prevention

Because Plagiolepis squamulosa workers are only 1.5-2.5mm, escape prevention is your top priority. These tiny ants can squeeze through gaps that seem impossible. Use fine mesh (at least 0.5mm or finer) on all ventilation holes. Apply fluon or similar barrier products to the edges of your formicarium. Test tube setups work well for founding colonies, use cotton plugs that are firmly packed but not so tight that the queen might get stuck. When you eventually move them to a formicarium, choose one with tight-fitting connections and narrow tubing. Check all seals weekly, especially if your colony is small, a single lost queen or a few workers escaping can set you back significantly. ^[1]

Feeding and Diet

Plagiolepis squamulosa will accept a variety of foods. Offer sugar water, honey, or diluted maple syrup as a constant carbohydrate source. For protein, provide small live prey like fruit flies, pinhead crickets, or mealworm pieces. Their tiny size means prey items should be appropriately scaled, what seems small to you is a full meal to them. The presence of replete workers in wild colonies suggests they can store liquid food, so offering sugar sources is particularly beneficial. Feed protein every 2-3 days, removing any uneaten prey after 24 hours to prevent mold. Remove sugar sources if they become contaminated or evaporate to a sticky residue. ^[2]

Temperature and Seasonal Care

Keep your colony at room temperature, ideally around 20-24°C. These ants come from the Geraldton region of Western Australia, which has a Mediterranean climate with mild winters and warm summers. During the warmer months (roughly October through April in Australia), colony activity will increase. In winter, plan for a diapause period, reduce temperatures to around 15°C for 2-3 months. You can achieve this by moving the colony to a cooler room or using a small cooler placed near (not on) the formicarium. Do not feed during deep diapause but ensure a small water source is available. Resume normal feeding and temperatures gradually in spring. ^[1]

Colony Development

Plagiolepis squamulosa colonies start with a claustral founding queen who seals herself in a small chamber and raises her first workers alone using stored fat reserves. The first workers, called nanitics, will be smaller than mature workers but should still be recognizable. Growth rate is likely moderate, not as fast as tropical species but faster than some slow-growing temperate ants. Colonies may develop replete workers that store liquid food, which is an interesting adaptation to observe in captivity. Be patient during the founding phase, it can take 1-2 months before you see the first workers, and several months before the colony has more than a dozen workers. ^[2]

Nesting Preferences

In the wild, these ants nest under stones in sandy areas near the coast. For captivity, they do well in setups that mimic this. A Y-tong (acrylic) nest with small chambers works well, or you can use a naturalistic setup with a sand-filled container and flat stones on top for cover. The chambers should be appropriately sized, tight enough that the ants feel secure but with enough space for the colony to expand. Provide a water tube or moisture source in one area of the nest to maintain slight humidity. Avoid overly moist conditions as this can cause mold issues in their native dry-to-moderate habitat. ^[1]

Frequently Asked Questions

References