Volynets E.B.
Bulletin of the North-East scientific center 2025; (4): 12-23
A new genus of fern, Vachrameeviopsis, Volynets gen. sp. nov., is described with the type species V auriculatus, sp. nov., from the Aptian, Early Cretaceous, in the Razdolnaya Coal Basin, Primorsky Krai, Russia. This fern genus demonstrates a combination of vegetative and reproductive characters. Ferns of this genus are characterized by single- or double-pinnate fronds, dense venation in pinnules, symmetrical to asymmetrical auricular bases, and the basal lateral veins forming venation in the auricles. Fertile pinnules are slightly reduced, and the sori are unfused and located along the midrib of the pinnule on both sides. The new genus is compared with modern representatives of the subtropical/tropical family Blechnaceae, to which it shows the greatest similarity with the genus Brainea and Doodia, as well as with some other representatives of the genera Blechnum, Blechnopsis, Cranfilla, etc.
