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DOI: 10.31862/2500-2961-2021-11-3-311-326

A new find of the foliar seed-bearing organ in the Lower Permian deposits of the Urals in a context of florogenetical links between Late Paleozoic and Mesozoic floras

The paper deals with a new find of the foliar seed-bearing organ from the locality Aleksandrovskoe (Lower Permian, Kungurian; Sverdlovsk region, Krasnoufimsl district). This seed-bearing organ is conditionally assigned to the genus Baruligyna Krassilov et Doludenko in open nomenclature. Length of the plant fossil is 13 mm; width is 8 mm. The apex of the seed-bearing organ is detached; the axis (rachis) is flatten, its width is slowly decreases from the base (width is 1.7 mm) towards the apical part. Rachis bears the axial furrow disposed on its adaxial side. The rachis surface is relatively smooth, with weakly expressed prolonged folds. Hypothesis on the taxonomical attribution of this seed-bearing organ to the corystospermalean pteridosperms with the leaves of the morphological Dicroidium – type is suggested. The leaves similar to the genus Dicroidium occur in the Permian deposits of Angaraland and surrounding regions. It is quite possible that some of these leaves could belong to the plant with the seed-bearing organs Baruligyna sp. from the Lower Permian deposits of the Cis-Urals.

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