Резюме. Приведены иллюстрированные описания с российс кого Дальнего Востока двух новых для науки видов-Eukiefferiella captiosa sp.n. по трём стадиям развития и E. bykova sp.n. по имаго самцу и куколке. Впервые описаны куколка и личинка для E. convexa Makarchenko et Makarchenko, а также дано переописание куколки E. devonica (Edwards), указанного впервые для российского Дальнего Востока и краткое описание неопределенной куколки Eukiefferiella sp., которая наиболее близка виду E. ilkleyensis Edwards. Для всех видов сделаны таксономические замечания со сравнительной характеристикой для близкородственных видов и уточнено распространение.
The characteristic of changes in communities of benthic invertebrates and fish in a small watercourse as its salinisation is given. It is shown the Shannon diversity index and Balushkina chironomid index play the greatest value in assessing the effect of salinity on river communities. There was a violation of the structure of the fish population of the river, expressed in the complete disappearance of fish in the area of intensive receipt of highly mineralized waters.
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