Chelaner majeri

Chelaner majeri

Chelaner majeri is a small to medium-sized ant species native to Western Australia. Workers measure 4.67-5.00mm, making them relatively large for the genus ^[1]. They have a distinctive reddish coloration, the alitrunk (middle body section), petiole, and postpetiole range from reddish-orange to crimson, while the head is darker and the gaster, antennae, and legs are dark red-brown ^[1]. This species belongs to the bicorne species group and has a very localized distribution in the Murchison area, east of Geraldton in Western Australia ^[1]. They were originally described as Chelaner majeri in 2001 and later moved to the genus Chelaner ^[2]. The species was named in honor of Dr. Jonathan Majer from Curtin University ^[1].

Quick Summary

• Difficulty: Unknown, limited data available
• Origin & Habitat: Eastern Geraldton region of Western Australia, in mallee habitat ^[1]
• Colony Type: Unknown, colony structure has not been documented
• Size & Growth:
  • Queen: Undocumented, no queen measurements available
  • Worker: 4.67-5.00mm ^[1]
  • Colony: Unknown, no colony size data available
  • Growth: Unknown
  • Development: Unknown, development timeline has not been studied (No direct data available. Related Australian Monomorium species typically develop in 6-10 weeks at warm temperatures.)
• Antkeeping:
  • Temperature: Likely tolerates warm to hot conditions given their Western Australian distribution. Start around 24-28°C and observe colony activity. Room temperature (20-24°C) is likely acceptable.
  • Humidity: Mallee habitats are typically dry to semi-arid. Keep nest substrate moderately dry with a small water reservoir. Avoid overly damp conditions.
  • Diapause: Unknown, Western Australian ants may have reduced activity during cooler months but true hibernation requirements are unstudied.
  • Nesting: Natural nesting occurs in mallee (Australian eucalyptus shrubland). Likely nests in soil or under stones. A test tube setup or Y-tong nest with moderate humidity would be appropriate. Avoid overly moist conditions.
• Behavior: Not well documented. As a member of the Myrmicinae subfamily, they likely have a stinger but are too small to penetrate human skin effectively. Their large eye size suggests they may be more visually oriented than many ants. Escape risk is moderate given their 5mm size, standard containment measures should suffice.
• Common Issues: limited data means care requirements are estimated rather than confirmed, very restricted natural distribution means few keepers have experience with this species, no documented colony structure, single or multiple queen arrangement is unknown, development timeline is unconfirmed, making it hard to track colony progress

Natural History and Distribution

Chelaner majeri is endemic to Western Australia with a very limited distribution in the Murchison area, east of Geraldton ^[1]. The type specimens were collected from mallee habitat, a type of Australian eucalyptus woodland characterized by multi-stemmed shrubs growing from a lignotuber ^[1]. This species occurs sympatrically (in the same area) with the similar Chelaner striatifrons, but can be distinguished by its larger eyes and differences in the alitrunk, nodes, and gaster ^[1]. The species was originally described in 2001 by Brian Heterick and later transferred to the genus Chelaner in 2019 ^[2]. The name majeri honors Dr. Jonathan Majer of Curtin University's School of Environmental Science ^[1].

Identification and Appearance

Workers of Chelaner majeri are relatively large for the genus, measuring 4.67-5.00mm in total length ^[1]. They have a distinctive reddish coloration: the alitrunk, petiole, and postpetiole are reddish-orange to crimson, while the head is darker (sometimes with a darkened frons), and the gaster, antennae, and legs are dark red-brown ^[1]. The head is cordate (heart-shaped) with a strongly concave vertex. The compound eyes are large and ovoid, with eye width greater than 1.5 times the greatest width of the antennal scape ^[1]. The median clypeal carinae (ridges on the face) are produced apically as a pair of pronounced teeth. The propodeum (the rear portion of the alitrunk) is angulate in profile, sometimes with small denticles or sharp flanges on the posterior angles ^[1].

Housing and Nesting

Given their mallee habitat in semi-arid Western Australia, these ants likely prefer drier conditions than many tropical ant species. A test tube setup works well for founding colonies, with a small water reservoir to maintain moderate humidity. For established colonies, a Y-tong (acrylic) nest or plaster nest with chambers scaled to their 5mm size would be appropriate. Avoid overly damp conditions, the substrate should be moist but not wet, with some drier areas available. Standard escape prevention is adequate given their moderate size, though small gaps should still be avoided.

Feeding and Diet

The specific diet of Chelaner majeri has not been documented. As a member of the Solenopsidini tribe (which includes other Monomorium species), they likely are omnivorous, accepting both sugar sources and protein. Offer sugar water or honey as a carbohydrate source, and protein sources such as small insects (fruit flies, small crickets, mealworms). Given their size, prey items should be appropriately sized. Feed every 2-3 days and remove uneaten prey to prevent mold.

Temperature and Seasonal Care

Chelaner majeri comes from the Geraldton region of Western Australia, which has a warm to hot climate with mild winters. Keep the nest at roughly room temperature or slightly warm (22-28°C). They likely tolerate higher temperatures given their arid-native distribution. During Australian winter (June-August), activity may naturally decrease. True hibernation requirements are unknown, if kept in a temperate climate, a cool period (15-18°C) during winter months may be beneficial but is not confirmed as necessary.

Frequently Asked Questions

References