Abstract
The Cincticostella insolta complex (Ephemeroptera: Ephemerellidae) is reviewed based on new and historic material, as well as new field observations. Three new species are described viz., C. richardi Martynov & Palatov, sp. nov. and C. ranga Selvakumar & Subramanian, sp. nov. from India, and C. sivaramakrishnani Martynov & Palatov, sp. nov. from Nepal. A correction of the original description and some additional distinguishing features are given for C. braaschi Jacobus & McCafferty, 2008. Cincticostella insolta (Allen, 1971), C. braaschi and C. bifurcata Xie, Jia, Chen, Jacobus & Zhou, 2009 are recorded from the Indian subregion for the first time. Summaries of known distribution data and habitat preferences, as well as larval diagnoses, are presented for all seven species of the complex.
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