Neoponera theresiae

Neoponera theresiae

Neoponera theresiae is a moderately large ponerine ant native to the Neotropics, reaching about 10mm in total length. Workers are dark reddish-black with reddish-brown mandibles and dark brown legs. They can be identified by the fine horizontal striae on the lower half of the petiole's front and back faces, as well as the sides. This species is closely related to Neoponera foetida and Neoponera villosa but is notably smaller than both of those species. Workers forage in the low arboreal zone and have been documented visiting extrafloral nectaries of Passiflora plants. The species was named in honor of princess Thérèse de Bavière. Queens and males remain unknown, and colony structure has not been documented in the scientific literature.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Neotropical region, Costa Rica, Panama, Peru, and Brazil (Amazonas). Found in wet forest habitats at low elevations, typically below 300 meters altitude. Workers forage in the low arboreal zone of forested areas ^[1][2][3].
• Colony Type: Unconfirmed, queen and male castes are unknown, colony structure has not been documented in scientific literature.
• Size & Growth:
  • Queen: Unknown, queen caste has not been described ^[1]
  • Worker: About 10mm total length ^[3]
  • Colony: Unknown, colony size has not been documented
  • Growth: Unknown, no development data available
  • Development: Unknown, no direct development data exists for this species. Based on related Neoponera species, expect 6-10 weeks at warm temperatures. (Development timeline is unconfirmed. Related Neotropical ponerines typically develop in 6-10 weeks at optimal temperatures.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. As a Neotropical wet forest species, they require warm, stable temperatures. A heating cable on one side of the nest can create a gentle gradient if room temperature is below this range.
  • Humidity: High humidity required, think damp rainforest floor. Keep the nest substrate consistently moist but not waterlogged. Provide a water source in the outworld. Good ventilation is essential to prevent mold while maintaining humidity.
  • Diapause: Unlikely, as a Neotropical species from lowland wet forests, they do not experience cold winters and likely do not require a diapause period. Maintain warm temperatures year-round.
  • Nesting: Natural nesting habits are undocumented. Based on wet forest habitat, a naturalistic setup with moist substrate or a Y-tong/plaster nest works well. Provide chambers scaled to their 10mm size.
• Behavior: Workers forage in the low arboreal zone, meaning they are active climbers that search for food in vegetation above ground level. They have been documented visiting extrafloral nectaries, suggesting they will accept sugar sources. As a ponerine ant, they likely have a functional stinger for defense and prey capture. Escape risk is moderate, their 10mm size makes them easy to contain with standard barriers, but ensure enclosures are secure.
• Common Issues: queen and colony structure unconfirmed makes captive breeding challenging, you may only be able to keep wild-caught colonies, high humidity requirements can lead to mold problems if ventilation is inadequate, limited scientific data means care requirements are partially inferred from related species, foraging in the arboreal zone suggests they need vertical space in their enclosure, temperature sensitivity, sudden drops or cold conditions could stress or kill the colony

Appearance and Identification

Neoponera theresiae workers are moderately large ants measuring approximately 10mm in total length. They have a distinctive dark reddish-black body with reddish-brown mandibles and dark brown legs. The most reliable identification feature is the fine horizontal striae (grooves) on the lower half of the petiole's front face, back face, and sides. This distinguishes them from the similar Neoponera bugabensis, which lacks these striations. The body is covered with erect hairs, and the dorsum has abundant appressed golden pubescence. The pronotal carina is well-developed and sharp, and the anterior face of the petiole meets the rounded posterior face at nearly a right angle. Workers are the only known caste, queens and males have not yet been described in scientific literature. ^[3][1]

Natural History and Distribution

This species is found across the Neotropical region including Costa Rica, Panama, Peru, and Brazil (specifically the Amazonas region). They inhabit wet forest habitats at low elevations, typically below 300 meters altitude. Workers forage in the low arboreal zone, meaning they are active climbers that search for food in vegetation rather than solely on the ground. Notably, they have been documented feeding at the extrafloral nectaries of Passiflora plants (Passifloraceae), indicating they will visit and likely feed on sugar sources from flowers. This arboreal foraging behavior is distinctive among Neoponera species and should be considered when setting up their enclosure. ^[1][2][3]

Housing and Enclosure Setup

Because workers forage in the low arboreal zone, provide an enclosure that allows for vertical exploration. A naturalistic setup with live plants or branches works well, or you can use a Y-tong/plaster nest with an outworld that includes climbing structures. Since their natural nesting sites are undocumented but they inhabit wet forests, keep the nest substrate consistently moist. Use a water tube or small water dish in the outworld to ensure they have access to drinking water. Escape prevention is straightforward given their 10mm size, standard barriers like fluon on test tube rims or formicarium lids work well. ^[3]

Feeding and Diet

Based on field observations of workers visiting extrafloral nectaries of Passiflora, Neoponera theresiae will accept sugar sources. Offer sugar water, honey, or diluted nectar regularly. As a ponerine ant, they are likely predatory and will hunt small invertebrates. Offer small live prey such as fruit flies, small crickets, mealworms, or other appropriately-sized insects. Feed protein prey 2-3 times per week and provide a constant sugar source. Remove uneaten prey after 24-48 hours to prevent mold. ^[1][3]

Temperature and Humidity Requirements

As a Neotropical species from wet lowland forests, Neoponera theresiae requires warm and humid conditions. Maintain temperatures between 24-28°C. A heating cable placed on one side of the nest can create a gentle thermal gradient, but avoid direct heat that could dry out the nest. Humidity should be high, the nest substrate should feel consistently moist but never waterlogged. Good ventilation is essential to prevent mold while maintaining humidity. If you see excessive condensation or mold, improve airflow while keeping the substrate moist. ^[1][2]

Colony Establishment and Challenges

A significant challenge for keepers is that the queen caste has not been described, meaning colony foundation behavior is completely unknown. You will likely only be able to obtain wild-caught colonies. Additionally, no scientific data exists on colony size, development timeline, or social structure. This makes the species more suitable for experienced keepers who can adapt to an unstudied species. Monitor colony behavior closely and adjust care based on their response. If workers appear sluggish, check temperature. If they avoid certain areas of the nest, adjust humidity gradients. ^[1]

Frequently Asked Questions

References