On the basis of the results of studying the faunal collections of bivalves and foraminifera collected in the period of 19762014 in the Cape Tsvetkov region in Eastern Taimyr, the knowledge of the PliensbachianAalenian part of the section of the Tsvetkov geological region is expanded. The bedding in the section is described, and a comprehensive paleontological characteristic is given. For the first time for this section, the following taxa are included in the composition of characteristic bivalve assemblages: Praemeleagrinella deleta, Siungiudella cf. parvula, Mytiloceramus (Lenoceramus) vilujensis, Mytiloceramus (Pseudomytiloides) oviformis, Oxytoma ex gr. kirinae, Arctotis (Praearctotis) similis, and Arctotis (Arctotis) tabagensis. On the basis of the use of auxiliary biostratigraphic subdivisionsbeds with bivalves and F-zones based on foraminiferathe section is correlated with the standard boreal ammonite scale. The age of the local stratigraphic units of the Eastern Taimyr structural-facies zone is refined. The Kiterbyutskaya Formation is considered within the Tiltoniceras antiquumDactylioceras commune zones, the Korotkinskaya Formation is considered within the Dactylioceras communePseudolioceras falcodiscus zones, and the Aprelevskaya Formation is considered within the Pseudolioceras maclintocki Zone. For the first time, images of the leading species of bivalves are presented.