Platythyrea dentinodis

Platythyrea dentinodis

Platythyrea dentinodis is a very rare ponerine ant species endemic to Western Australia. Workers are medium-sized ants measuring around 6-8mm, with a distinctive unicolorous yellowish-red to ferruginous yellow coloration. The species is easily recognized by the small but sharp uptilted tooth on the posterodorsal margin of the petiole. Their body has loose, coarse sculpture with a fairly strong shine, and they sport long dark standing hairs up to 0.18mm on dorsal surfaces. The antennae, mandibles, and legs match the body color ^[1].

This species has an extremely limited distribution known only from a handful of locations in southwestern Western Australia: the western wheatbelt around Tammin, the lower Darling Range near Worsley, and surprisingly, coastal bushland in Cottesloe (a Perth suburb). This patchy distribution and rarity make it a prized find for ant enthusiasts ^[2].

Quick Summary

• Difficulty: Unknown, very limited data available
• Origin & Habitat: Endemic to southwestern Western Australia, found in the western wheatbelt (Tammin), lower Darling Range (Worsley), and coastal relictual bushland (Cottesloe) ^[2][1]
• Colony Type: Colony structure is unconfirmed. Based on related Platythyrea species, likely single-queen colonies, though this has not been directly documented for this species.
• Size & Growth:
  • Queen: Unknown, not described in available literature
  • Worker: Approximately 6-8mm based on worker description ^[1]
  • Colony: Unknown, only known from type series and a few specimens
  • Growth: Unknown, no development data available
  • Development: Unknown, no direct measurements. Based on typical Ponerinae development, estimate 6-10 weeks at warm temperatures, but this is a rough guess. (Development timeline is unconfirmed. Ponerine ants typically have slower development than many myrmicines, but exact timing for this species is unknown.)
• Antkeeping:
  • Temperature: Based on Western Australian habitat: likely prefers warm conditions, roughly 22-28°C. Provide a temperature gradient so ants can self-regulate. Room temperature in most homes should work, but a heating cable on one side of the nest may benefit the colony.
  • Humidity: Based on collection locations (wheatbelt, coastal bushland): likely prefers moderate to slightly dry conditions. Keep nest substrate moderately moist but allow some drying between waterings. Avoid waterlogging.
  • Diapause: Unknown, Western Australia has mild winters. The species may have reduced activity during cooler months but true hibernation may not be necessary. Monitor colony behavior and reduce feeding if they become less active.
  • Nesting: Natural nesting sites are unconfirmed. Based on related species and Western Australian habitat, likely nests in soil under stones or in decaying wood. In captivity, a Y-tong (AAC) nest or plaster nest with moderate humidity works well. Provide a test tube setup for founding colonies.
• Behavior: Behavior is poorly documented. Ponerine ants are typically predatory with a potent sting, though this species' sting potency is unknown. They are likely more defensive than typical house ants. Workers probably forage individually for small prey. Escape risk is moderate, their medium size means standard barriers should work, but they are agile and may explore lid edges. Monitor for escapes, especially when the colony is active.
• Common Issues: Very limited availability, this is an exceptionally rare species that rarely appears in the antkeeping trade, No species-specific care information exists, keepers must rely on genus-level knowledge, Colony establishment may be difficult given the unknown founding behavior and potential sensitivity to conditions, Winter care is unclear, may need special consideration for mild vs. cool conditions, Unknown sting potency, handle with caution until more is known about their defensive abilities

Availability and Acquisition

Platythyrea dentinodis is an exceptionally rare species in the antkeeping hobby. It is endemic to southwestern Western Australia and has only been collected a handful of times since its description in 1930. You are unlikely to find this species for sale from commercial breeders, as most collections are scientific in nature. If you do obtain a colony, it likely will be from a hobbyist who has successfully kept and propagated this species, making it a true prize. Wild collection would require permits in Australia, and export may be restricted. Treat any colony you obtain as extremely valuable given the lack of captive breeding information ^[2].

Nest Setup and Housing

Since specific nesting preferences are unknown for this species, base your setup on what we know about related Platythyrea species and their Western Australian habitat. A Y-tong (AAC) nest or plaster formicarium works well for established colonies, providing moderate humidity retention. For founding colonies, use a standard test tube setup with a water reservoir. The nest should have chambers sized appropriately for medium-sized ants (6-8mm workers). Provide a temperature gradient by placing a heating cable on one side of the nest, this allows the colony to regulate their own temperature. Include an outworld area for foraging. Use standard escape prevention (Fluon on rim edges) as workers are agile and may attempt to explore gaps ^[1].

Feeding and Diet

Diet preferences are unconfirmed for Platythyrea dentinodis specifically, but Ponerine ants are typically predatory. Based on related species, they likely hunt small invertebrates such as springtails, booklice, and tiny beetles. Offer small live prey items appropriate to their size, flightless fruit flies, small mealworms, and similar micro-arthropods are good options. Sugar sources may be accepted occasionally, but Ponerines are not typically heavy honeydew consumers. Offer protein prey 2-3 times per week and remove uneaten items promptly to prevent mold. Start with small prey items and observe what the colony accepts ^[1].

Temperature and Seasonal Care

This species comes from southwestern Western Australia, a region with a Mediterranean climate featuring hot dry summers and mild wet winters. Based on this, aim for temperatures in the 22-28°C range, with some variation throughout the year. A heating cable or mat on part of the nest can provide warmth, but always include unheated areas so ants can escape overheating. During Australian winter (roughly June-August), you may see reduced activity, this is normal. Do not dramatically cool the colony unless they become clearly inactive. Monitor for signs of stress (workers clustering away from heat sources, reduced foraging) and adjust accordingly. The key is stable, warm conditions with a gradient for self-regulation. ^[2]

Handling and Temperament

Ponerine ants possess a functional sting and should be handled with caution. While the exact sting potency of P. dentinodis is unknown, related Platythyrea species can deliver painful stings. When working with the colony, use gentle, slow movements and avoid disturbing the nest directly. If threatened, workers may defend by stinging. For routine care (feeding, watering), observe from outside the nest first to assess temperament. This species is not aggressive toward humans when unprovoked, but will defend the colony if threatened. Always wash hands before working near the colony, as foreign scents can trigger defensive responses. Keep the colony enclosure away from vibrations and direct sunlight. ^[1]

Frequently Asked Questions

References