The Tribe Hyrtanellini Allen, 1980 (Ephemeroptera: Ephemerellidae) of Western and Central Asia with Description of a New Species †

SIMPLE SUMMARY: The larvae of tribe Hyrtanellini Allen, 1980 are very important from the biomonitoring and bioindication point of view. Unfortunately, the immature stage of some Hyrtanellini is difficult to identify as many authors have stressed. Moreover, in the mountainous areas of western and central Asia there is still clearly a significant number of undescribed new species. The present study focuses on the immature stage of the species of Hyrtanellini from Western and Central Asia. A new species of Serratella leonidi Martynov & Palatov, sp. nov. from Tajikistan is described, and generic placement of Serratella elissa Jacobus, Zhou & McCafferty, 2009 from Iran is discussed. Additionally, the phylogenetic reconstruction of Hyrtanellini based on the COI gene is proposed and discussed. Finally, considering the importance of correct identification of larvae for biomonitoring and investigation of aquatic fauna diversity, the key for the immature stage is shaped. ABSTRACT: A new species, Serratella leonidi Martynov & Palatov, sp. nov., is described from Tajikistan based on immature stage. Based on larval material from Iran including the topotypes, Serratella elissa Jacobus, Zhou & McCafferty, 2009 is complementary described, and its generic placement is clarified. The delimitation of three genera that are members of the tribe Hyrtanellini Allen, 1980, namely Serratella Edmunds, 1959, Torleya Lestage, 1917 and Quatica Jacobus & McCafferty, 2008 is briefly discussed. The phylogenetic reconstruction of Hyrtanellini based on the COI gene showed the relations of representatives of these genera on the one hand, and distinct delimitation of Serratella leonidi sp. nov. and S. elissa on the other. A list of species from Western and Central Asia attributed to Hyrtanellini, their currently known distribution and a key for the determination of the larvae are proposed.