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Abstract <p><i>Simulium dahestanicum</i> (Rubtsov, 1962) is a new species to the fauna of the Republic of Moldova, discovered in the Ichel River, a tributary of the Dniester. The data on the distribution and morphology of this rare species are limited. The paper provides a detailed morphological description of the larvae, pupae, and adults of <i>S. dahestanicum</i> in comparison with closely related species of the subgenus <i>Wilhelmia—S. equinum</i> (Linnaeus, 1758) and <i>S. pseudequinum</i> Séguy, 1921. New valuable diagnostic characters are described, including the postgenal cleft of <i>S. dahestanicum</i> larvae and the ratio of gill tube lengths in the pupae. The study was conducted from 2018 to 2022 in 10 rivers in Moldova, where 245 specimens were collected, including 96 <i>S. dahestanicum</i>, 18 <i>S. equinum</i>, and 131 <i>S. pseudequinum</i>. Updated data on the distribution of these species in Moldova are presented for the first time, along with new records of <i>S. deserticola</i> and <i>S. frigidum</i>. <i>Simulium dahestanicum</i> was found co-occurring with other species in the Ichel River, indicating high blackfly biodiversity in the region.</p>

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Simulium dahestanicum (Rubtsov, 1962) (Diptera, Simuliidae) in the Republic of Moldova: New Insights into the Morphology and Separation from Closely Related Species

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • A. I. Vasiliev

摘要

Abstract

Simulium dahestanicum (Rubtsov, 1962) is a new species to the fauna of the Republic of Moldova, discovered in the Ichel River, a tributary of the Dniester. The data on the distribution and morphology of this rare species are limited. The paper provides a detailed morphological description of the larvae, pupae, and adults of S. dahestanicum in comparison with closely related species of the subgenus Wilhelmia—S. equinum (Linnaeus, 1758) and S. pseudequinum Séguy, 1921. New valuable diagnostic characters are described, including the postgenal cleft of S. dahestanicum larvae and the ratio of gill tube lengths in the pupae. The study was conducted from 2018 to 2022 in 10 rivers in Moldova, where 245 specimens were collected, including 96 S. dahestanicum, 18 S. equinum, and 131 S. pseudequinum. Updated data on the distribution of these species in Moldova are presented for the first time, along with new records of S. deserticola and S. frigidum. Simulium dahestanicum was found co-occurring with other species in the Ichel River, indicating high blackfly biodiversity in the region.