Stenamma pelophilum

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Montane wet forests from eastern Mexico to Honduras, at elevations 1000-1800 m. Nests in clay or mud banks along streams ^[1][2].
• Colony Type: Single-queen colonies documented from field observations ^[2].
• Size & Growth:
  • Queen: Size data unavailable, described as having standard queen modifications but no total length reported ^[1].
  • Worker: Size data unavailable, described as small to medium-sized ^[1].
  • Colony: Up to approximately 46 workers in natural nests ^[2].
  • Growth: Unknown, no documented growth data
  • Development: Not documented for this species (Based on its tropical montane habitat, development likely takes several months at moderate temperatures.)
• Antkeeping:
  • Temperature: Provide moderate temperatures around 20-24°C, avoiding extremes. Originates from tropical montane forest ^[3].
  • Humidity: High humidity is essential. Keep the nest substrate consistently damp but not waterlogged, matching the wet forest environment ^[2].
  • Diapause: Unlikely, being tropical, it probably does not need a cold period. Maintain stable room temperature year-round.
  • Nesting: Prefers a naturalistic setup with moist clay or soil substrate that allows excavation. A Y-tong (AAC) or plaster nest with high humidity also works. The key is consistently damp substrate ^[2].
• Behavior: Workers are slow-moving and forage solitarily ^[2]. They are not aggressive. When the nest is disturbed, the queen quickly escapes, followed by workers carrying brood ^[2]. Escape risk is moderate given their small size, use fine mesh on all openings.
• Common Issues: high humidity requirements, poor ventilation leads to mold, which can kill the colony., unknown founding behavior, wild-caught colonies may be difficult to establish in captivity., disturbance triggers queen evacuation and brood abandonment, handle gently and avoid sudden movements., small size increases escape risk, fine mesh is essential for all connections., temperature sensitivity, must stay within 20-24°C, both heat waves and cold snaps can be fatal.

Natural History and Distribution

Stenamma pelophilum is known only from the Neotropical region, from eastern Mexico (states of Hidalgo, Oaxaca, Queretaro, San Luis Potosi, Tamaulipas, Veracruz) through Guatemala to Honduras ^[1][3]. It occupies a narrow elevational range of 1000-1800 m in montane wet forests ^[2]. The species was described in 2013 by Michael Branstetter based on specimens from Honduras and Guatemala ^[1]. Most collections are from Winkler or Berlese leaf‑litter samples, but two nests were found in clay banks along a stream in Cusuco National Park, Honduras ^[2]. These nests had a single chamber each, with 35 and 46 workers, respectively, plus brood and one dealate queen in the larger nest ^[2]. The species name pelophilum combines Greek pelo‑ (mud) and ‑philum (lover) ^[2].

Housing and Nest Setup

To match its natural habitat, provide a naturalistic setup: a container filled with a moist clay‑soil mixture that allows the ants to excavate chambers. The substrate must stay damp but not waterlogged. Alternatively, a Y‑tong (AAC) or plaster nest with high humidity can work. The key is consistent moisture. Provide a water tube connected to the nest. Because natural entrances are only about 2 mm in diameter, the ants prefer tight, enclosed spaces. Use a small outworld for feeding, large open areas are not needed ^[2].

Feeding and Diet

No direct dietary data are available for Stenamma pelophilum. Based on general Stenamma habits, they are likely generalist predators and scavengers, feeding on small invertebrates and honeydew. In captivity, offer tiny live prey such as fruit flies, small crickets, and other suitably sized insects. Sugar water or honey can be provided occasionally. Because workers are slow and small, prey items must be smaller than the workers. Offer food a few times per week and remove uneaten leftovers to prevent mold.

Temperature and Seasonal Care

As a tropical montane species, Stenamma pelophilum prefers moderate temperatures, not tropical heat. Keep the nest at 20-24 °C. Avoid temperatures above 28 °C or below 15 °C ^[3]. A typical room temperature (21-23 °C) is probably ideal. Diapause is not required, the ants may slow down during cooler periods but do not need forced cold. Simply maintain stable, moderate conditions year‑round ^[2].

Behavior and Handling

Workers are slow‑moving and forage alone, not in trails ^[2]. They are not aggressive. When a nest chamber is disturbed, the queen immediately runs out onto the surface, followed by workers carrying brood ^[2]. This escape behavior is their main defense. Therefore, always handle colonies gently and avoid sudden movements. Use fine mesh on all openings because of the ants’ small size, standard fluon barriers may be insufficient if not properly maintained.

Frequently Asked Questions

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References