Platythyrea schultzei

Platythyrea schultzei

Platythyrea schultzei is a small to medium-sized ant native to the Afrotropical region, found across southern and eastern Africa including Namibia, South Africa, Angola, Democratic Republic of Congo, Zambia, Zimbabwe, Kenya, Mozambique, and Uganda ^[1]. Workers are approximately 5-7mm in length with the characteristic flattened body shape typical of the Platythyrea genus. They have dark brown to black coloration and distinctive mandibles adapted for their predatory lifestyle.

This species is remarkable because it is one of the few truly queenless ants, it lacks a morphologically distinct queen caste entirely. Instead, reproduction is carried out by gamergates, which are mated workers that take on the reproductive role. Colonies are small, typically containing around 20 workers, with only one gamergate per colony ^[2]. This makes P. schultzei fascinating for antkeepers interested in alternative social structures.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to the Afrotropical region, found across southern and eastern Africa from Namibia and South Africa east to Kenya and Uganda ^[1]. In South Africa, they are known from the Kruger National Park area and have been recorded as a negative indicator taxon decreasing with elevation above 1200m ^[3]. They nest in soil or under stones in savanna and woodland habitats.
• Colony Type: Queenless, reproduces via gamergates (mated workers). Single gamergate species with approximately 21 workers per colony ^[2]. No morphologically distinct queen caste exists.
  • Special: Gamergates
• Size & Growth:
  • Queen: N/A, queen caste absent ^[2]
  • Worker: 5-7mm (estimated from genus)
  • Colony: Up to ~21 workers on average ^[2]
  • Growth: Slow, small colony size
  • Development: Unknown, not directly studied (Development timeline unconfirmed. Based on typical Ponerinae patterns, expect several months from egg to adult worker.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. They come from warm African habitats so they prefer temperatures in the mid-to-high 20s. A heating cable on one side of the nest creates a suitable gradient.
  • Humidity: Moderate humidity around 50-70%. These ants prefer drier conditions compared to many Ponerinae. Allow the nest substrate to dry out partially between water additions.
  • Diapause: Unknown for this species. Many African ants may reduce activity during cooler months but true hibernation is unlikely given their tropical/subtropical range.
  • Nesting: Test tubes or Y-tong nests work well. They prefer tight, enclosed spaces. A small outworld area allows for hunting and foraging. Provide a moisture chamber but avoid overly wet conditions.
• Behavior: These are relatively docile ants for a Ponerine species. Workers are predatory and will hunt small invertebrates. They have functional stingers but rarely use them against humans. Escape prevention is important as workers are agile and can climb smooth surfaces. They are not aggressive toward keepers but will defend their nest if threatened.
• Common Issues: small colony size means losses have big impact, a single worker death is significant in colonies of ~20, queenless system is fragile, if the gamergate dies and no replacement is mated, the colony cannot recover, lack of documented captive breeding means establishing a colony from wild-caught specimens is challenging, predatory diet requires constant live prey, they cannot survive on sugar alone

Understanding the Queenless System

Platythyrea schultzei is one of the few ant species that has completely lost the queen caste. Instead of a large, specialized queen, reproduction is handled by gamergates, workers that have mated and can lay fertilized eggs. This is a rare and fascinating social structure where mated workers integrate back into the workforce and monopolize egg-tending tasks ^[4]. Each colony typically has just one gamergate that does most of the egg-laying ^[2].

For antkeepers, this means you cannot look for a queen, there isn't one. Instead, you would need to locate a colony with a functional gamergate. The system is regulated: virgin workers do not develop eggs when a mated worker is present in the colony ^[4]. If the gamergate dies and no replacement is available, the colony cannot produce new workers and will eventually die out.

Feeding and Diet

As Ponerinae ants, Platythyrea schultzei are predatory and need a protein-rich diet. They hunt small invertebrates including springtails, fruit flies, small beetles, and other tiny arthropods. In captivity, offer small live prey items 2-3 times per week. Remove any uneaten prey within 24 hours to prevent mold.

While many Ponerinae will accept sugar water or honey as a supplementary energy source, protein should form the bulk of their diet. Observe your colony's acceptance of different prey types and adjust feeding accordingly. The small colony size means they need less food than larger species, overfeeding can actually harm them by creating mold problems in the nest.

Housing and Nest Setup

Given their small colony size of around 20 workers, these ants do well in compact setups. A test tube setup with a water reservoir works for founding colonies, while a small Y-tong or acrylic nest suits established colonies. They prefer tight chambers and narrow passages rather than large open spaces.

Provide a small outworld for hunting and foraging. Use a substrate barrier or fluon on the rim of the outworld to prevent escapes, these ants are good climbers. Keep the nest relatively dry compared to many other Ponerinae, excessive moisture can be harmful. A small water chamber for humidity is sufficient.

Colony Acquisition and Establishment

Acquiring Platythyrea schultzei is challenging because they are not commonly kept and there is limited captive breeding information. Your best option would be to find an established colony in the wild, looking under stones in their African range. You would need to locate a colony containing a functional gamergate.

Once established, colony growth is slow. Expect a small colony that remains modest in size. The queenless system means you cannot simply add a new queen if things go wrong, the colony's survival depends entirely on maintaining a mated, reproductive worker. This makes them a species for more experienced antkeepers who understand the unique challenges of queenless species. ^[2]

Temperature and Seasonal Care

Keep these ants warm at 24-28°C. They originate from warm African habitats and higher temperatures support their metabolism and brood development. A heating cable on part of the nest creates a thermal gradient they can choose between.

The diapause requirements are unknown for this species. Many African ants from their range do not undergo true hibernation but may reduce activity during cooler periods. Monitor your colony's activity levels and adjust temperature accordingly. Avoid temperatures below 20°C for extended periods as this could stress or kill the colony.

Frequently Asked Questions

References