Chelaner ravenshoensis

Chelaner ravenshoensis

Chelaner ravenshoensis is a small to medium-sized ant species native to northeast Queensland, Australia, named after the town of Ravenshoe where it was first collected. Workers measure approximately 3.3-3.5mm in total body length, with a distinctive appearance featuring a large eye and a strongly flattened promesonotum (the middle body section). The coloration is russet with darker areas, and the gaster (abdomen) is dark brown, tending toward black at the tip ^[1].

This species belongs to the rubriceps species group within the Solenopsidini tribe. Unfortunately, almost nothing is known about the biology of this ant, it is represented by only a handful of type specimens, and no research has documented its colony structure, founding behavior, or captive care requirements ^[1].

Quick Summary

• Difficulty: Unknown
• Origin & Habitat: Northeast Queensland, Australia. The type locality is near Ravenshoe, Queensland. Based on the rubriceps group association, these ants likely inhabit woodland or forest environments in tropical to subtropical Australia ^[1].
• Colony Type: Unconfirmed. The colony structure of C. ravenshoensis has not been documented. Members of the Chelaner rubriceps group typically form small to moderate colonies, but the exact structure for this species is unknown.
• Size & Growth:
  • Queen: Unknown, no queens have been described for this species
  • Worker: 3.28-3.47mm total body length (HML), head length 1.13-1.20mm, head width 0.99-1.09mm ^[1]
  • Colony: Unknown, no colony size data exists for this species
  • Growth: Unknown
  • Development: Unknown, no development data exists for this species (Based on related species in the rubriceps group, development likely takes 6-10 weeks at optimal temperature, but this is entirely estimated)
• Antkeeping:
  • Temperature: Unknown for this species. Based on related Monomorium species from similar habitats, aim for roughly 22-26°C with a gradient allowing the colony to choose their preferred temperature.
  • Humidity: Unknown. Related Australian Monomorium species typically prefer moderately humid conditions. Keep the nest substrate slightly moist but not waterlogged, with some drier areas available.
  • Diapause: Unknown. Northeast Queensland experiences mild winters, so a true hibernation may not be required, but this is unconfirmed.
  • Nesting: Unknown. Based on the rubriceps group association, these likely nest in soil, under stones, or in rotting wood. A test tube setup or Y-tong nest with moist substrate would be a reasonable starting point.
• Behavior: Behavior is undocumented. Based on related species in the genus, they are likely relatively peaceful and not aggressive. Workers are monomorphic (all the same size). Escape prevention should be moderate, workers at ~3.5mm are not tiny but can still fit through small gaps.
• Common Issues: no documented biology means all care is speculative, start with standard Monomorium-type setup and observe colony response, no confirmed temperature requirements, monitor for signs of stress (lethargy in cool areas, clustering near heat), no confirmed humidity needs, watch for mold (too wet) or workers avoiding the nest (too dry), colony may fail without clear reason due to unknown requirements, keep detailed notes, no information on acceptable foods, begin with sugar water and small protein sources

Species Identification and Taxonomy

Chelaner ravenshoensis was originally described as Chelaner ravenshoensis by Heterick in 2001,based on a few worker specimens collected near Ravenshoe, Queensland. The species was later transferred to the genus Chelaner by Sparks et al. in 2019 following phylogenetic analysis. The specific name was corrected from ravenshoense to ravenshoensis in 2025 to comply with mandatory gender agreement rules, as Chelaner is masculine while Monomorium is neuter ^[2][1].

The species is diagnostic within the rubriceps group due to its combination of a large eye (eye width greater than 1.5x the greatest width of the antennal scape) and a strongly flattened promesonotum. Workers are monomorphic, meaning all workers are the same size ^[1].

Distribution and Habitat

Chelaner ravenshoensis is known only from the type locality near Ravenshoe in northeast Queensland, Australia. This region features tropical to subtropical climates with warm temperatures year-round. The specific microhabitat is unknown, but members of the rubriceps group in Australia typically nest in soil, beneath stones, or in rotting wood in woodland or forest edge environments ^[1].

Current State of Knowledge

This is one of the least studied ant species in Australian myrmecology. Only a handful of worker specimens exist, and no research has ever documented the biology, colony structure, queen description, or any behavioral aspects of this species. The original description by Heterick (2001) provides only morphological details ^[1].

For captive care, keepers must rely entirely on inference from related species in the Chelaner rubriceps group. This means all recommendations are educated guesses based on what similar species in the group require. There is no documented success or failure information for keeping this species in captivity. This makes C. ravenshoensis an experimental species suitable only for advanced antkeepers who enjoy documenting and sharing their observations.

Recommended Starting Approach

Since nothing is known about this species' requirements, begin with a standard setup for small to medium Myrmicinae ants. A test tube setup with a water reservoir works well for founding colonies. For food, offer sugar water (honey diluted 1:4 with water) and small protein sources like fruit flies, small mealworms, or other appropriately-sized insects. Keep temperature around 24°C initially and humidity moderate, the substrate should feel damp but not have standing water ^[1].

Observe your colony carefully and document everything: when they are active, where they cluster, how they respond to different foods, and any signs of stress. This species represents an opportunity to contribute genuinely new knowledge to antkeeping, whatever you discover may be the first information ever documented about this species' biology.

Frequently Asked Questions

References