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Four species of the family Nemouridae, Amphinemura helanshana sp. n., A. didyma Zhu & Yang, Nemoura geei Wu, and Nemoura cf. securigera Klapálek were collected during a two years survey of the Helan Mountains of Inner Mongolia, China. Nemoura cf. securigera has not been collected for more than one hundred years.
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LI et al. (2013) studied this question.
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