Chelaner longinodis

Chelaner longinodis

Chelaner longinodis is a medium-sized Myrmicine ant native to southwestern Western Australia, particularly common in the Perth metropolitan area and surrounding regions. Workers measure 2.89-3.50mm and display striking variable coloration depending on location, Perth-area populations feature crimson alitrunk and nodes with an orange head and black gaster, while southern coastal populations tend toward dull orange or tawny brown with darker infuscation. This species belongs to the longinode group and is one of the larger Chelaner species encountered in the region, preferring to nest in sandy soil in relic bushland areas ^[1].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Southwestern Western Australia, particularly common in the Perth metropolitan area and south-west corner of WA. This species inhabits sandy soils in relic bushland and woodland areas, showing a preference for sandy substrates in warm temperate to Mediterranean climates ^[1][2].
• Colony Type: Colony structure is unconfirmed in scientific literature. Based on related Monomorium species, likely monogyne (single queen) but facultatively polygyne populations may exist. Further research needed to confirm queen number and colony social structure.
• Size & Growth:
  • Queen: Estimated 6-8mm based on genus patterns and worker size ^[1]
  • Worker: 2.89-3.50mm ^[1]
  • Colony: Unknown, no documented colony size studies exist for this species
  • Growth: Moderate, estimated based on similar Myrmicinae species
  • Development: 6-10 weeks estimated based on related Monomorium species and temperate Australian climate (Development time likely follows genus patterns for Myrmicinae in southwestern Australia, expect moderate growth rate with first workers (nanitics) appearing within 2-3 months during warm season)
• Antkeeping:
  • Temperature: Keep at 22-26°C, with a gentle gradient allowing workers to self-regulate. Based on Mediterranean climate of southwestern WA, they tolerate temperatures from 18-30°C but prefer stable warmth in the low-to-mid 20s°C range
  • Humidity: Moderate humidity (50-70%). Sandy soil nesting suggests they prefer drier conditions than many Myrmicinae, allow substrate to dry partially between waterings but provide a moist area for brood development
  • Diapause: Likely required. Western Australian temperate climate suggests a winter rest period (diapause) during cooler months (May-September). Reduce temperature to 15-18°C and reduce feeding during this period
  • Nesting: Y-tong (AAC) nests or plaster nests work well. This species prefers sandy soil in the wild, so a test tube setup with sand substrate or a naturalistic formicarium with sandy areas mimics their natural nesting preferences. Tight escape prevention is important as workers are small (under 4mm) ^[1]
• Behavior: Workers are active foragers with moderate aggression toward intruders. They are not particularly aggressive but will defend the nest. Escape prevention is critical due to their small size, they can squeeze through tiny gaps. Foraging activity is typically diurnal. They likely use chemical recruitment to food sources, similar to related Monomorium species.
• Common Issues: escape prevention is critical due to small worker size, use fine mesh and tight-fitting barriers, colonies may struggle if kept too wet, sandy soil preference indicates they need better drainage than typical ant species, winter diapause is often required but beginners may keep them too warm year-round, leading to colony stress, slow growth compared to tropical species may cause keepers to overfeed or disturb the colony unnecessarily, wild-caught colonies may harbor parasites that can decimate captive colonies

Housing and Nest Setup

Chelaner longinodis adapts well to various captive setups. A test tube setup works well for founding colonies, use a test tube with a water reservoir separated by a cotton plug, filled with sandy substrate. For established colonies, a Y-tong (AAC) nest or plaster formicarium with sand areas mimics their natural sandy soil habitat. The key requirement is providing a dry, well-drained nesting area with some moist chambers for brood. Because workers are small (under 4mm), excellent escape prevention is essential, use fine mesh on all openings and apply fluon or similar barriers to outworlds. A small outworld connected to the nest allows for feeding without disturbing the colony. ^[1]

Feeding and Diet

Based on related Monomorium species, C. longinodis is likely omnivorous with a preference for protein sources. In captivity, offer protein foods such as small crickets, mealworms, fruit flies, or other small insects twice weekly. They will likely accept sugar sources like honey water or sugar water, especially during high activity periods. Fresh water should always be available. Avoid overfeeding, remove uneaten prey after 24-48 hours to prevent mold. The sandy soil habitat suggests they may be adapted to drier conditions, so ensure the nest area remains relatively dry while providing moisture in one section for brood development.

Temperature and Seasonal Care

Maintain temperatures in the 22-26°C range for optimal colony health and development. A heating cable on one side of the nest creates a temperature gradient allowing ants to self-regulate. During Australian winter (roughly May-September), reduce temperatures to 15-18°C to provide a diapause period, this mimics their natural seasonal cycle in southwestern WA. Reduce feeding during diapause and minimize disturbances. Do not cool suddenly, gradually reduce temperature over 2-3 weeks. Resume normal temperatures in spring as colony activity increases. Sudden temperature changes or keeping them warm year-round can stress colonies and lead to decline.

Colony Development and Growth

Colony growth is moderate rather than rapid. A newly mated queen will likely seal herself in a chamber (claustral founding) and raise her first brood alone using stored fat reserves. First workers (nanitics) should appear within 2-3 months during warm conditions. Growth rate depends heavily on temperature, warmer temperatures within the acceptable range speed development, while cooler temperatures slow it significantly. Do not disturb founding colonies unnecessarily. Once workers emerge, the colony will grow steadily but not explosively. Expect 6-10 workers in the first few months, with growth accelerating as the colony reaches 20-30 workers. Maximum colony size is unknown but likely similar to related Monomorium species at several hundred workers.

Behavior and Temperament

This species displays typical Myrmicinae behavior, workers are active foragers that venture out from the nest to search for food. They are not among the most aggressive ants but will readily defend the nest if threatened. Workers communicate through chemical signals and likely use tandem-running or chemical trails to recruit nestmates to food sources. The most critical behavioral consideration for keepers is escape prevention, their small size means they can slip through gaps that seem impossible. Always check for tiny gaps around connections, use fine mesh (at least 0.5mm), and apply barrier products to all potential escape routes. With proper setup, they are a rewarding species to observe.

Frequently Asked Questions

References