Breakthrough Discovery in Sharjah's Mountainous Regions

The arid landscapes of the United Arab Emirates (UAE) have long been known for their unique ecosystems, but a recent expedition has unveiled four previously undocumented spider species in Sharjah. This discovery, announced by the Environment and Protected Areas Authority (EPAA), underscores the UAE's untapped biodiversity potential, particularly in the rugged Hajar Mountains and associated valleys. Researchers from the Al Dhaid Wildlife Museum conducted extensive field surveys in areas like Wadi Shees, Wadi Al Helo, and Masafi, collecting specimens that revealed these new arachnids. Such findings not only enrich global taxonomic knowledge but also highlight the role of dedicated environmental research in the region.

Spiders, belonging to the class Arachnida and order Araneae, play crucial roles in ecosystems as predators controlling insect populations. In the UAE's harsh desert and mountain habitats, they have adapted remarkable survival strategies, from burrowing behaviors to specialized hunting techniques. This discovery brings the documented spider diversity in the UAE closer to estimates of 300-500 species, from the previously known 85 across 55 genera and 24 families.

The Research Team Behind the Find 🕷️

Leading the effort was Professor Mostafa R. Sharaf, a distinguished entomologist and Professor of Entomology at EPAA Sharjah. With a Ph.D. and Fellow of the Royal Entomological Society (FRES), Sharaf has a prolific career in Arabian arthropod taxonomy, previously affiliated with institutions like Ain Shams University in Egypt. His team included Maryam Al Qaydi, Meera Al Tunaiji, Latifa Sultan, and Latifa Rashid, under the supervision of Khafiya Al Ketbi, director of the Al Dhaid Wildlife Museum. This multidisciplinary group employed meticulous collection methods, including pitfall traps and hand-capturing during nocturnal surveys, standard in arachnological fieldwork.

The project represents an international collaboration featured in ZooKeys volume 1276, involving experts from Russia, Finland, Hungary, and South Africa, led by Alireza Zamani and Yuri Marusik. This partnership exemplifies how UAE-based research integrates with global scientific networks, fostering knowledge exchange and validation through peer-reviewed publication. For aspiring researchers in the UAE, such collaborations offer valuable opportunities to contribute to world-class taxonomy.Read the full ZooKeys paper

Species Profiles: Unique Adaptations Unveiled

• Leptopilos hajarensis Zamani & Marusik & Sharaf & Al Qaydi, 2026: Known as the Hajar Mountain Spider, this female holotype was collected in Wadi Shees (25°17'24.0"N, 56°14'42.0"E, 306m elev.). Measuring 2.90mm total length, it features a pale beige body, distinct median furrow on the epigyne, and smaller anterior receptacles. First record of genus Leptopilos in UAE.
• Prodidomus emiratus Zamani & Marusik, 2026: The Emirates Spider, from Masafi (25.238°N, 56.165°E). Named to honor the UAE, its epigyne shows characteristic copulatory ducts. Prodidomidae family ground-dwellers.

The other two species, detailed in the publication, were named for morphological traits—one likely a jumping spider (Salticidae) and another ground spider (Gnaphosidae or Lycosidae)—highlighting diverse families. These spiders exhibit adaptations like camouflage against rocky terrains and nocturnal activity, essential for survival in low-humidity environments.

Taxonomic identification involved microscopic examination of genitalia, DNA barcoding where possible, and comparison with global databases—a step-by-step process starting from field preservation in ethanol, dissection, imaging, and phylogenetic analysis.

Habitats: UAE's Wadis as Biodiversity Hotspots

Wadi Shees and Wadi Al Helo, seasonal riverbeds in the Hajar Mountains, provide microhabitats with gravel, sparse vegetation, and seasonal moisture—ideal for burrowing spiders. Masafi's higher elevation adds elevational gradients influencing speciation. These sites, protected under EPAA, face threats from urbanization and climate change, making documentation urgent.

UAE's biodiversity surveys have intensified post-2021, aligning with UAE Vision 2021 and net-zero goals, revealing how wadis support 20-30% of endemic arthropods.

Significance for Arachnology and Ecology

Beyond adding to the 22 new species records and 16 genera firsts for UAE, this bolsters ecological baselines. Spiders indicate ecosystem health; their decline signals pest surges or habitat loss. In UAE, where over 1,000 insect species are known, these finds aid pest management in agriculture.Khaleej Times coverage

EPAA's Role in UAE Research Landscape

EPAA Sharjah, under Chairperson Aisha Rashid Deemas, invests in museums like Al Dhaid for citizen science and pro-research policies. Quotes emphasize policy impact: "Documenting new species strengthens conservation." This ties to UAE's higher education, where institutions like UAE University (UAEU) and Khalifa University host entomology programs collaborating on biodiversity.

Links to UAE Higher Education Institutions

While EPAA leads, UAE universities amplify such research. NYU Abu Dhabi’s Terrestrial Ecology Lab studies UAE arthropods, UAEU’s Biology Department catalogs desert fauna, and Khalifa University’s ecosystems research integrates AI for species ID. Professor Sharaf's work inspires students; UAEU offers MSc in Biology focusing on local biodiversity. These discoveries fuel curricula, theses, and jobs in research.

International Collaboration and Publication

Published April 2026 in ZooKeys, the paper advances global arachnology. Collaborators like Zamani (University of Helsinki) validate UAE data, promoting open-access science.

Conservation Challenges and Strategies

• Habitat fragmentation from development.
• Climate aridification reducing prey.
• Invasive species competition.

Solutions: Protected areas expansion, citizen apps for sightings, university-led monitoring.

Future Prospects for UAE Arachnology

Ongoing EPAA surveys predict 50+ new species. Universities gear up with genomics labs; actionable for students: join field courses, pursue PhDs in taxonomy.

Photo by Michael Barber on Unsplash

Broader Implications for Regional Ecology

Enhances UAE's global research profile, supports UN SDGs 14/15. For academics, opportunities in grants, publications.