Lasius tibialis

Quick Summary

• Difficulty: Unknown, too little documented to assess reliably
• Origin & Habitat: High Atlas Mountains, Morocco (Jbel Toubkal region) at approximately 2800m elevation ^[1][2]
• Colony Type: Unconfirmed, likely single-queen like most Lasius species, but no direct documentation exists
• Size & Growth:
  • Queen: 1.73 mm ^[2]
  • Worker: size data unavailable
  • Colony: Unknown, no colony size data exists for this species
  • Growth: Unknown, likely moderate like other Lasius species
  • Development: estimated 6-10 weeks based on typical Lasius development at optimal temperature (Direct measurements not available for this species.)
• Antkeeping:
  • Temperature: Likely prefers cooler conditions given 2800m altitude, suggest starting around 18-22°C and observing colony activity
  • Humidity: Standard Lasius requirements, moderate humidity with access to both moist and drier areas in the nest
  • Diapause: Likely required, most Lasius species from temperate/mountain regions need winter dormancy. Suggest a hibernation period of 2-3 months at 5-10°C
  • Nesting: No specific data exists. Likely accepts standard Lasius setups like test tubes, Y-tong nests, or plaster formicaria. The high-altitude origin suggests they may prefer cooler, more stable temperatures.
• Behavior: No behavioral studies exist for this species. Based on genus patterns, they are likely docile like other Lasius species, not aggressive, and may show typical Lasius foraging patterns. Escape risk is moderate, workers around 4-5mm need standard barrier precautions.
• Common Issues: lack of documented care information makes proper husbandry challenging, high-altitude origin means temperature tolerance may differ from typical lowland Lasius, no data on colony founding success rates in captivity, winter dormancy requirements are inferred, not confirmed, observe colony response, availability is extremely limited as this species is rarely kept or sold

Species Background and Identification

Lasius tibialis is an enigmatic species with a complicated taxonomic history. Originally described from a single queen collected in Morocco's High Atlas Mountains, Wilson (1955) synonymized it with Lasius rabaudi. However, Cagniant's 2006 review of Moroccan ants restored L. tibialis as a valid endemic species, noting that the synonymy should not be retained ^[1]. The first workers were documented in 1992 from Jbel Aguelzim in the Toubkal massif at roughly 2800 meters elevation, making this one of the highest-elevation Lasius species documented in North Africa ^[2]. The species is morphologically very similar to L. rabaudi, but geographic isolation suggests reproductive isolation ^[2]. Males remain unknown to science. For antkeepers, this species is essentially undocumented in captivity.

Natural Habitat and Implications for Captive Care

This species is known only from the High Atlas Mountains of Morocco, specifically the Toubkal region at approximately 2800 meters elevation. This high-altitude origin has significant implications for care. The environment at this elevation experiences cool temperatures year-round, with cold winters and mild summers. Unlike many Lasius species found in warmer lowland areas, L. tibialis likely evolved to tolerate and perhaps prefer cooler conditions. In captivity, this suggests avoiding the warm conditions that work well for tropical species. Instead, aim for room-temperature conditions around 18-22°C, with the possibility of providing a slight thermal gradient. ^[1][2]

Nesting Preferences

No published information exists on the natural nesting habits of Lasius tibialis. However, based on the genus, most Lasius species nest in soil, under stones, or in rotting wood. They often create shallow to moderate-depth nests that provide access to both moisture and drier chambers. For captive breeding, standard Lasius setups work well: test tube setups for founding colonies, transitioning to Y-tong nests or plaster formicaria once established. Given their high-altitude origin, they may appreciate cooler nest temperatures and might avoid very warm, dry conditions. Provide a water tube for humidity but ensure good ventilation to prevent mold.

Feeding and Nutrition

No specific dietary studies exist for Lasius tibialis. Like other Lasius species, they likely have a typical diet of honeydew and small insects for protein. In captivity, offer sugar water or honey water as a constant carbohydrate source, and provide protein sources like fruit flies, small crickets, or mealworms. Lasius species are generally not aggressive predators, they prefer scavenging and collecting honeydew rather than hunting large prey. Feed protein roughly twice weekly, and keep sugar water available at all times. Remove uneaten prey after 24-48 hours to prevent mold issues.

Temperature and Seasonal Care

Based on the 2800m elevation origin, L. tibialis likely prefers cooler conditions than typical house-temperature Lasius. Start around 18-22°C and monitor colony behavior, if workers are consistently clustered near the warmest part of the nest, consider slightly increasing temperature, if they avoid heated areas, reduce temperature. Most Lasius species require a winter dormancy period, and this high-altitude species almost certainly does. Provide 2-3 months of cold conditions around 5-10°C during winter. This can be accomplished by moving the colony to a cold garage or refrigerator with ventilation. Skipping hibernation can weaken or kill colonies over time.

Colony Establishment and Growth

No documented cases exist of Lasius tibialis being raised from founding to maturity in captivity. Based on genus patterns, founding is likely claustral, the queen seals herself in a small chamber and survives entirely on her stored fat reserves until her first workers emerge. This typically takes 4-8 weeks for Lasius species, though no specific timeline exists for L. tibialis. The first workers will be smaller than normal workers and will initially tend the brood and forage for food. Colony growth will be slow initially. Patience is essential, especially with a species with no captive history.

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References