We document the occurrence of the Oriental butterfly species Euchrysops cnejus in northern Oman. It is very similar to E. osiris whose distribution extends from the Afrotropical region into Dhofar, southern Oman. Oman is thus the only country where both species co-occur. The two species differ in genitalia and in molecular data. We show that based on the COI marker, E. cnejus and E. osiris are sister species and the Oman populations of E. osiris are closely related to the population from continental Africa. Haplotype diversity is lower in E. cnejus, than in E. osiris. Genetic differences were found between the Australian, Oriental and Oman populations of E. cnejus but available data were not sufficient to clarify the origin of the Oman population.

中文翻译：

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来自阿曼的蝴蝶 Euchrysops cnejus (Fabricius) 的新记录，以及关于 E. cnejus 和 E. osiris (Hopffer)（鳞翅目：Lycaenidae）的系统地理学模式的注释

我们记录了东方蝴蝶物种 Euchrysops cnejus 在阿曼北部的出现。它与 E. osiris 非常相似，其分布从亚热带地区延伸到阿曼南部的佐法尔。因此，阿曼是唯一两个物种同时出现的国家。这两个物种在生殖器和分子数据上有所不同。我们表明，基于 COI 标记，E. cnejus 和 E. osiris 是姐妹物种，并且 E. osiris 的阿曼种群与来自非洲大陆的种群密切相关。E. cnejus 的单倍型多样性低于 E. osiris。在澳大利亚、东方和阿曼 E. cnejus 种群之间发现了遗传差异，但现有数据不足以阐明阿曼种群的起源。