Abstract As an essential component of lotic habitats, aquatic insects have commonly been used as bio-indicators of the ecological integrity of lotic habitats. However, recent large-scale declines have given rise to concerns about freshwater ecosystems functioning correctly. During three consecutive years, we surveyed Wadi Cherf, Upper Seybouse, Algeria, and employed the size-frequency distribution of head capsule width to sketch the life history of Oligoneuriopsis skhounate, an Ibero-Maghrebian endemic mayfly, whose distribution and ecology are not so well-known known. O. skhounate exhibited a seasonal univoltine summer cycle with growth and development taking place during the warmest period of the year (late spring to early autumn). The absence of nymphs during winter and the presence of last instar nymphs from July to November suggested a lengthy egg diapause, following the aestivo-autumnal emergence and reproduction. The study also raises the issue of freshwater biodiversity conservation in North Africa by highlighting the case of O. skhounate, acting as an indicator species of important but vulnerable aquatic ecosystems.

中文翻译：

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伊比利亚-马格里布特有的 Oligoneuriopsis skhounate Dakki 和 Guidicelli（蜉蝣目：Oligoneuriidae）的生活史

摘要 作为水草栖息地的重要组成部分，水生昆虫已被普遍用作水草栖息地生态完整性的生物指标。然而，最近的大规模下降引起了人们对淡水生态系统正常运作的担忧。我们连续三年对阿尔及利亚上赛博兹Wadi Cherf进行了调查，利用头囊宽度的大小频率分布描绘了伊比利亚-马格里布特有的蜉蝣的生活史，它的分布和生态不太好——众所周知。O. skhounate 表现出季节性的单变夏季周期，生长发育发生在一年中最温暖的时期（晚春到初秋）。冬季没有若虫，7 月至 11 月有最后一龄若虫，这表明在夏秋季节萌发和繁殖后，卵滞育时间很长。该研究还通过突出 O. skhounate 的案例提出了北非淡水生物多样性保护的问题，O. skhounate 作为重要但脆弱的水生生态系统的指示物种。