Carebara sharjahensis

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Wadi Shees, Al Hajar Mountains, Sharjah, United Arab Emirates (25.290°N, 56.245°E, 418m elevation). Found on a small farm with date palms, maize crops, and lemon trees. Soil was irrigated, relatively moist, and rich with decomposing organic matter including livestock dung and fallen decaying dates ^[1]. Likely endemic to the Hajar Mountains ^[1].
• Colony Type: Unknown, only a single soldier specimen has ever been collected. Colony structure (single-queen or multi-queen) is completely unstudied.
• Size & Growth:
  • Queen: Unknown, only the soldier caste has been described ^[1]
  • Worker: Unknown, worker caste has not been described ^[1]
  • Colony: Unknown, only one specimen ever found ^[1]
  • Growth: Unknown
  • Development: Unknown, this species has never been kept in captivity and its biology is completely unstudied (No development data exists for this species.)
• Antkeeping:
  • Temperature: Unknown, no captive data exists. The UAE has hot summers but the species likely lives in cooler, moister underground conditions.
  • Humidity: Likely requires high humidity. The type locality had irrigated, relatively moist soil with decomposing organic matter ^[1]. However, no captive humidity data exists.
  • Diapause: Unknown, no seasonal data exists for this species. The UAE has mild winters but the species' underground lifestyle may provide temperature stability. Diapause requirements are completely unstudied.
  • Nesting: Likely subterranean/nesting in soil. The single specimen was collected by sifting soil from a moist, organic-rich farm habitat ^[1]. The reduced eyes (only 3 ommatidia) and fossorial morphology suggest they nest underground and rarely come to the surface. No captive nesting data exists.
• Behavior: Completely unstudied in captivity. The species is likely hypogaeic (subterranean) and fossorial (digging), with soldiers having highly reduced eyes suggesting minimal visual dependence ^[1]. The presence of horns on the head and specialized morphology suggests potential defensive or competitive behaviors, but this is entirely speculative. Escape risk cannot be assessed as no colonies exist in captivity. Temperament is unknown.
• Common Issues: this species has never been kept in captivity, no care information exists, only a single specimen has ever been found, suggesting extremely small population or highly cryptic behavior, likely endemic to a very specific microhabitat in the Hajar Mountains that may not exist in captivity, the species may be vulnerable to local extinction, collecting wild colonies would be ecologically irresponsible, completely unknown colony structure, founding behavior, and dietary requirements make captive keeping impossible

Why This Species Is Not Suitable for Keeping

Carebara sharjahensis was only described in 2025 and represents one of the most poorly known ant species in the world. Only a single soldier specimen has ever been collected, despite multiple targeted surveys at the type locality ^[1]. This means absolutely no biological or ecological information exists for captive care. We do not know what they eat, how they form colonies, what temperature or humidity they require, or even what the worker caste looks like. More importantly, this species is likely endemic to a very specific microhabitat in the Al Hajar Mountains and may be vulnerable to local extinction ^[1]. Collecting wild colonies would be ecologically irresponsible for a potentially endangered species. This caresheet exists only to document what we know from the scientific description, it should not be interpreted as encouragement to seek out this species for captivity.

Natural History and Discovery

This species was discovered and described by Mostafa R. Sharaf in 2025 from a single soldier specimen collected in Wadi Shees, Al Hajar Mountains, Sharjah, United Arab Emirates ^[1]. The specimen was found by sifting soil from an irrigated farm at 418m elevation, where date palms, maize crops, and lemon trees grew. The soil was moist and rich with decomposing organic matter including livestock dung and fallen decaying dates ^[1]. The ant coexists with several other species including Nylanderia jaegerskioeldi, Pheidole megacephala, Pheidole parva, Polyrhachis lacteipennis, Tetramorium simillimum, Tapinoma melanocephalum, and Anochetus annetteae ^[1]. The species is named after the Sharjah emirate where it was found ^[1].

Identification and Morphology

Carebara sharjahensis soldiers are tiny at 2.88mm total length, making them among the smaller Carebara species ^[1]. They are uniformly yellow with brown-yellow mandibles. The most distinctive feature is the pair of sharp, anteriorly curved horns on the posterior corners of the head, these horns are fringed with numerous setae and are about 1.5× longer than broad in profile view ^[1]. The species has highly reduced eyes with only three ommatidia, suggesting minimal visual reliance ^[1]. The antennae have nine segments with a two-segmented club ^[1]. The propodeum has small but distinct denticles, and the petiole lacks a ventral process ^[1]. These features distinguish it from the similar Carebara khamiensis from Zimbabwe, which has shorter horns without setae, a notched clypeus, and a subpetiolar process ^[1].

Ecological Status and Conservation

Based on the complete absence of additional specimens despite repeated surveys, Carebara sharjahensis appears to be either extremely rare or highly cryptic in its behavior ^[1]. The species is considered likely endemic to the Hajar Mountains, a mountain range that spans Oman and the UAE and represents a biodiversity hotspot in an otherwise arid region ^[1]. The specialized habitat requirements (moist, organic-rich soil in irrigated farmland) and limited distribution suggest this species could be vulnerable to local extinction if its specific microhabitats disappear ^[1]. Any hypothetical captive breeding efforts would require extreme caution to avoid harming wild populations of what may be an endangered species.

Frequently Asked Questions

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References