TY - JOUR AU - Naugolnykh, Serge V. PY - 2001/12/31 Y2 - 2024/03/28 TI - A new peltaspermaceous pteridosperm from the Upper Permian of the Russian platform JF - Journal of Palaeosciences JA - JPS VL - 50 IS - (1-3) SE - Research Articles DO - 10.54991/jop.2001.1822 UR - https://jpsonline.co.in/index.php/jop/article/view/1822 SP - 189-205 AB - <p>The paper focuses on the description of a new species of peltaspermalean pteridosperm <em>Peltaspermopsis polyspermis </em>Naug. sp. nov. The plant remains were collected from the Upper Permian (Tatarian) of northern part of Russia (N. Dvina River Basin). The species is characterized both by reproductive organs (seed bearing discs and their racemose aggregations) and vegetative organs (stems with nodes of seasonal growth interruptions and <em>Pursongia</em>-like lanceolate leaves). The new combination <em>Peltaspermum parvulum </em>(Six tel) Naug. comb. nov. is proposed. General questions concerning <em>Pursongia </em>Zalessky, its taxonomical composition, morphological features and its relationship with <em>Glossopteris </em>are discussed. The species <em>Pursongia amalitzkii </em>Zalessky is described on the base of newly collected material.</p> ER -