Nylanderia pini

Nylanderia pini

Nylanderia pini is a small ant species native to the higher elevation pine and mixed pine forests of the Dominican Republic. Workers measure 2.40-2.80 mm and are generally dark brown in color, with lighter brownish-yellow to yellow funiculus, mandibles, and leg segments. The species can be identified by its gastral pubescence pattern, present only on the mid to posterior end of the first gastral tergite, and a distinct fringe of pubescence along the dorsal face of the propodeum. Queens reach approximately 4.1 mm in length. The species was formally described in 2019 and is named after the pine forests where it was discovered, specifically in the Parque Nacional Armando Bermúdez at around 1037 meters elevation ^[1].

This species is one of several Nylanderia species found in the Dominican Republic and can be distinguished from similar species like N. fuscaspecula by its larger size, particularly scape length typically exceeding 0.8 mm, and the distinctive pubescence patterns on the gaster and propodeum. In some locations, N. pini occurs sympatrically with N. fuscaspecula, meaning they share the same geographic area ^[1].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Dominican Republic, higher elevation pine and mixed pine forests at 1037+ meters elevation. Nests found in leaf litter at base of trees, rotten wood, under rocks, and in soil ^[2].
• Colony Type: Colony structure is unconfirmed. Based on typical Nylanderia genus patterns, colonies likely contain multiple queens, but this has not been directly documented for this species.
• Size & Growth:
  • Queen: 4.1 mm ^[1]
  • Worker: 2.40-2.80 mm ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown, no development data available
  • Development: Estimated 6-8 weeks based on typical Nylanderia genus patterns at optimal temperature (No direct development data exists for this species. Estimates based on related species in the genus.)
• Antkeeping:
  • Temperature: Keep at 22-26°C. This species comes from higher elevation Dominican Republic forests, which are cooler and more humid than lowland areas. A gentle temperature gradient allows the colony to self-regulate.
  • Humidity: Requires moderate to high humidity, think damp forest floor conditions. Keep nest substrate consistently moist but not waterlogged. Provide a water tube as a moisture source.
  • Diapause: Unknown, no specific data on overwintering requirements. The higher elevation origin suggests some tolerance for cooler conditions, but a true diapause may not be required in captivity.
  • Nesting: Prefers moist nest materials like soil, rotting wood, or test tubes with water reservoirs. In captivity, a test tube setup or acrylic nest with moisture provision works well. Avoid dry conditions.
• Behavior: This is a small, active ant species. Workers are fast-moving and will readily forage for food. Escape prevention should be considered due to their small size, they can squeeze through small gaps. They are not known to be particularly aggressive. Workers likely forage individually rather than using tandem running. The species is not documented to have a functional sting.
• Common Issues: small size means escapes are likely without fine mesh barriers, no documented development data makes timing uncertain for beginners, higher elevation origin means they may not tolerate prolonged high temperatures, humidity requirements are not well-documented, monitor for drying, wild-caught colonies may have parasites that are difficult to treat

Origin and Natural Habitat

Nylanderia pini is endemic to the Dominican Republic, specifically found in higher elevation pine and mixed pine forests. The type locality is Parque Nacional Armando Bermúdez at approximately 1037 meters elevation, where specimens were collected from moss and soil under a tree. This ant has been collected from nests in leaf litter at the base of trees, inside rotting wood, under rocks, and in soil. The species name 'pini' comes from the Latin word for pine, reflecting its association with pine-dominated forests ^[1]. The higher elevation location suggests this species prefers cooler and more humid conditions compared to lowland tropical ants.

Identification and Distinguishing Features

Workers of Nylanderia pini are generally dark brown with lighter brownish-yellow to yellow funiculus (antennae segments), mandibles, and leg segments. The most distinctive identification features are the gastral pubescence pattern, pubescence is present only on the mid to posterior end of the first gastral tergite, with the anterior region being without pubescence, and a distinct fringe of pubescence along the dorsal face of the propodeum. Workers measure 2.40-2.80 mm in total length, with scape length typically greater than 0.8 mm. This species can be distinguished from the similar N. fuscaspecula by its larger size and different pubescence patterns. N. metacista workers have dense pubescence across gastral tergites I and II, which never occurs in N. pini ^[1].

Housing and Nesting

In captivity, Nylanderia pini should be provided with a moist nest environment. Based on their natural nesting preferences (litter, rotting wood, under rocks, in soil), a test tube setup with a water reservoir works well for founding colonies. For established colonies, an acrylic nest or naturalistic setup with soil substrate maintains appropriate humidity. The nest area should be kept consistently moist but not waterlogged. Because of their small size (under 3 mm), escape prevention is important, use fine mesh barriers and ensure any connections between outworld and nest are secure. Provide a separate outworld for foraging with access to sugar water and protein sources. ^[2]

Feeding and Diet

While specific dietary requirements have not been documented for N. pini, Nylanderia species in general are omnivorous and will accept sugar sources and protein. In captivity, offer sugar water or honey as a constant energy source, and provide protein such as small insects (fruit flies, small mealworms, crickets) or commercial ant food. Feed protein 2-3 times per week, removing any uneaten food after 24 hours. Fresh water should always be available. ^[2]

Temperature and Seasonal Care

Based on the higher elevation origin of this species (1000+ meters in the Dominican Republic), they likely prefer cooler conditions than typical tropical ants. Aim for temperatures in the 22-26°C range. Avoid prolonged exposure to temperatures above 30°C. A heating cable on one side of the nest can create a temperature gradient, allowing the colony to self-regulate. Specific overwintering or diapause requirements are unknown, but the higher elevation origin suggests some tolerance for cooler conditions. Monitor colony activity, if workers become sluggish, slightly lower temperatures may be appropriate, but avoid cold shocking the colony. ^[1]

Growth and Development

The development timeline for Nylanderia pini has not been directly documented. Based on typical Nylanderia genus patterns, expect approximately 6-8 weeks from egg to first worker at optimal temperature (around 24-26°C). Queens measure 4.1 mm, which is moderately large for the genus and suggests they have substantial fat reserves for claustral founding. Workers emerge at 2.40-2.80 mm. Because no specific development data exists for this species, keepers should observe their colony's progress and adjust conditions accordingly. Nanitics (first workers) are typically smaller than normal workers and may take slightly less time to develop. ^[1]

Frequently Asked Questions

References