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Abstract <p>Morphology and ultrastructure of spermatozoa of ciliate cockscomb <i>Alectrias cirratus</i> and spiny cockscomb <i>A. benjamini</i> were studied for the first time, using scanning and transmission electron microscopy. Both similarities and differences in sperm structure have been identified, allowing for their reliable differentiation. On average, the spermatozoon nucleus of <i>A. cirratus</i> is 7.19-µm long, flagellum, 46.52-µm long; in <i>A.&#xa0;benjamini</i>, the corresponding values are 7.60 and 49.60 µm. The spermatozoa of <i>A. benjamini</i> are coiled in the testicular tissue, a unique feature not found in other fish species.</p>

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Spermatozoon Ultrastructure in Ciliate Cockscomb Alectrias cirratus and Spiny Cockscomb Alectrias benjamini (Stichaeidae)

  • 期刊论文

  • 发表日期：

    2026年6月23日

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  • S. Yu. Neznanova,
  • A. A. Balanov

摘要

Abstract

Morphology and ultrastructure of spermatozoa of ciliate cockscomb Alectrias cirratus and spiny cockscomb A. benjamini were studied for the first time, using scanning and transmission electron microscopy. Both similarities and differences in sperm structure have been identified, allowing for their reliable differentiation. On average, the spermatozoon nucleus of A. cirratus is 7.19-µm long, flagellum, 46.52-µm long; in A. benjamini, the corresponding values are 7.60 and 49.60 µm. The spermatozoa of A. benjamini are coiled in the testicular tissue, a unique feature not found in other fish species.