Abstract
Three species of Trochodendroides were described fr om the Late Cretaceous deposits of the Chingandzha Formation. Two of them (T. tumanensis Yudova, sp. nov. and T. deminii Yudova et Golovn., sp. nov.) were described as new species, and one was described as Trochodendroides sp. Comparison of new species of the genus Trochodendroides of the Chingandzha flora with representatives of this genus in other Late Cretaceous floras of Northeastern Russia shows that they were presented in composition of the Coniacian Tylpegyrgynai flora of the Pekulnei ridge too, wh ere they were described with other species names (Trochodendroides arctica (Heer) Berry, and Zizyphus smilacifolia Budants.). The presence of the same species shows a similarity of the Chingandzha with Tylpegyrgynai flora and confirms the Coniacian age of the Chingandzha flora.
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