Odonata of Yakutia (Russia) with description of Calopteryx splendens njuja ssp. nov. (Zygoptera: Calopterygidae)

A short overview of the history of odonatological exploration of Yakutia and an annotated checklist of 35 spp. currently known from its territory are provided with reference to all earlier records and lists of hitherto unpublished specimens. Calopteryx splendens, Aeshna grandis and Ophiogomphus obscurus were not previously known from Yakutia. C. splendens njuja ssp. n. is described and illustrated. Holotype S'. Russia, Sakha Republic, Yakutia: Lena Ulus, the Nyuya river at the mouth of the Chayanda; 14-VII-2006; deposited in Institute of Animal Systematics and Ecology, Novosibirsk. It is characterised by a drastic reduction of wing pigmentation in S S.