Temnothorax cenatus

Temnothorax cenatus

Temnothorax cenatus is a small myrmicine ant native to central Kenya, found in savannah habitats around Lake Nakuru National Park and Lake Elmenteita ^[1]. Workers measure 3.2-3.6mm and have a distinctive appearance with a brown dorsum on the head, while the remainder of the body is dull yellow with a brown tint, particularly on the petiole and postpetiole ^[1]. The species is characterized by relatively long antennal scapes that surpass the posterior margin of the head, moderately large eyes, and acute propodeal spines. Only known from the worker caste, this species remains poorly studied with limited biological data available. It was originally described as Temnothorax cenatus before being reclassified to Temnothorax in 2003. The closely related species T. megalops differs primarily in having larger eyes and a differently shaped petiole node.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Central Kenya, specifically Lake Nakuru National Park and Lake Elmenteita at approximately 1800m elevation. Found in savannah habitat with leaf litter, suggesting ground-nesting behavior ^[1][2].
• Colony Type: Unconfirmed, colony structure has not been documented. Most Temnothorax species are single-queen colonies, but this has not been verified for T. cenatus.
• Size & Growth:
  • Queen: Unknown, only worker caste has been described ^[1].
  • Worker: 3.2-3.6mm ^[1].
  • Colony: Unknown, no colony size data exists for this species.
  • Growth: Unknown, no development studies available.
  • Development: Unconfirmed, typical Temnothorax development suggests 6-10 weeks at optimal temperature, but no species-specific data exists. (Development timeline is unconfirmed for this species. Related temperate Temnothorax species typically develop from egg to worker in 6-10 weeks at room temperature.)
• Antkeeping:
  • Temperature: Based on Kenyan savannah climate, aim for 22-26°C. Avoid temperatures below 18°C or above 30°C. Room temperature within this range is suitable ^[2].
  • Humidity: Moderate humidity around 50-70% is appropriate. Provide a moist nest chamber but allow some drying between waterings. Savannah species tolerate drier conditions than forest-dwelling ants.
  • Diapause: Unknown, no documented diapause requirement exists. Kenyan species may not require true hibernation but may show reduced activity during cooler months.
  • Nesting: Natural nesting occurs in soil and leaf litter. In captivity, a small test tube setup or Y-tong nest with tight chambers works well. Ensure chambers are appropriately scaled to their tiny 3-4mm size.
• Behavior: Temperament is typical of Temnothorax, generally peaceful and non-aggressive. Workers are small and quick-moving. Escape prevention is critical due to their tiny size, use fine mesh barriers and ensure all openings are sealed. They likely form small colonies and may show tandem-running recruitment to food sources, as is typical for the genus.
• Common Issues: tiny size means escapes are likely without fine mesh barriers, biology is largely unknown so care is based on genus-level inference, only known from worker caste, queen and colony structure unconfirmed, limited availability in the antkeeping hobby due to rarity, wild-caught colonies may have parasites given limited study

Origin and Natural Habitat

Temnothorax cenatus is endemic to central Kenya, known only from the Lake Nakuru region in the eastern Rift Valley ^[1]. The type specimens were collected from leaf litter sampling in savannah habitat at elevations around 1800m ^[1]. The Lake Nakuru area features savannah grassland with scattered acacia trees and is situated in a region that experiences warm temperatures year-round with seasonal rainfall. The original collection method (leaf litter extraction) suggests this species nests in the ground or within ground-level debris rather than in trees ^[2]. This is consistent with general observations that many African Temnothorax species nest in soil, leaf litter, or under stones ^[2]. The savannah environment implies adaptation to warmer, moderately dry conditions with seasonal variation.

Identification and Distinguishing Features

100), and relatively large compound eyes occupying about 30% of head width with 10-11 ommatidia in the longest row ^[1]. The propodeal spines are moderately long and acute. The petiole node has well-developed anterior and posterior dorsal angles with a more or less flat dorsum between them. Color pattern shows a brown head dorsum contrasting with a dull yellow body that has brown tinting on the petiole and postpetiole ^[1]. This species is most closely related to Temnothorax megalops but can be distinguished by its smaller eyes and differently shaped petiole node.

Temperature and Care

Based on the species' Kenyan savannah origin, maintain temperatures in the 22-26°C range. This aligns with typical room temperatures in many homes and matches the warm conditions of their natural range ^[2]. Avoid prolonged exposure to temperatures below 18°C or above 30°C, as this could stress the colony. A heating cable on one side of the nest can create a gentle thermal gradient if your room temperature runs cool. Place the heating element on top of the nest rather than underneath to prevent excessive drying. Monitor colony activity, workers that cluster near heat sources indicate a need for warmer conditions, while avoiding heat suggests the temperature is too high.

Housing and Nesting

In captivity, provide a small nest chamber scaled to their tiny 3-4mm worker size. A standard test tube setup works well for founding colonies, with a water reservoir connected via cotton. For established colonies, Y-tong (AAC) nests or small acrylic formicaria with tight-fitting chambers are appropriate. The nest material should retain some moisture but not become waterlogged, these are ground-nesting ants from savannah habitat, not rainforest species. Ensure excellent escape prevention, their small size allows them to squeeze through gaps that would contain larger ants. Use fine mesh on any ventilation holes and check all lid seals regularly. A small outworld area allows for feeding and provides space for colony expansion. ^[1]

Feeding and Diet

Like most Temnothorax species, T. cenatus likely accepts a varied diet including small insects and sugar sources. Offer small prey items such as fruit flies, pinhead crickets, or small mealworms, appropriately sized to their tiny workers. Sugar water, honey, or diluted syrup can be offered as an energy source. In the wild, these ants would forage for small arthropods and likely tend aphids for honeydew. Feed small amounts 2-3 times per week and remove uneaten prey after 24 hours to prevent mold. Fresh water should always be available. ^[1]

Colony Development and Growth

This species remains poorly documented in scientific literature, with no published data on colony development, founding behavior, or colony size limits ^[1]. Only the worker caste has been described, meaning queen morphology and colony structure are unknown. Based on typical Temnothorax genus patterns, founding likely occurs claustrally, the queen seals herself in a small chamber and lives off stored fat reserves until her first workers (nanitics) emerge. Development from egg to first worker likely takes 6-10 weeks at optimal temperature, though this is an estimate based on related species rather than confirmed for T. cenatus specifically. Colonies probably remain relatively small, possibly reaching a few hundred workers at maximum based on typical genus patterns.

Frequently Asked Questions

References