Abstract The present contribution gives a faunistic overview on the distribution of Caenidae in Iran. Four species have so far been reported, of which Caenis macrura Stephens, 1835 by far is the most abundant and most widely spread species. Caenis kopetdagi Kluge, 1985 was previously only known from three localities in the Kopet Dag Mountain range, which stretches along the border between Turkmenistan and Iran. We report this species from three further localities at the western border of the Zagros Mountains in southwest Iran, thus considerably expanding its distribution. The nymph of Caenis kopetdagi is re-described, its validity is confirmed, and modern diagnostic characters are added. Its CO1 sequence is provided and compared with sequences of other species of Caenis Stephens, 1835 occurring in the Middle East. The habitat of C. kopetdagi as well as the distribution of Caenidae in Iran and of Caenis in the Middle East is also discussed.

中文翻译：

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伊朗的 Caenidae（昆虫纲：Ephemeroptera），1985 年对 Caenis kopetdagi Kluge 的若虫进行了新的记录和重新描述

摘要 目前的贡献给出了关于伊朗仙人掌科分布的动物学概述。迄今为止已报道了四种物种，其中 Caenis macrura Stephens, 1835 是迄今为止数量最多、分布最广的物种。Caenis kopetdagi Kluge, 1985 以前仅在沿土库曼斯坦和伊朗边界延伸的 Kopet Dag 山脉的三个地方已知。我们从伊朗西南部扎格罗斯山脉西部边界的另外三个地方报告了该物种，从而大大扩大了其分布范围。Caenis kopetdagi 的若虫被重新描述，其有效性得到证实，并添加了现代诊断特征。提供了它的 CO1 序列，并与 1835 年发生在中东的其他 Caenis Stephens 物种的序列进行了比较。C.栖息地