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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Paleontological Journal</journal-id><journal-title-group><journal-title xml:lang="en">Paleontological Journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Палеонтологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0031-031X</issn><issn publication-format="electronic">3034-5871</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">691811</article-id><article-id pub-id-type="doi">10.31857/S0031031X25040108</article-id><article-id pub-id-type="edn">dstkme</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Anatomy of leaves Ptilophyllum riparium Gordenko, 1999 emend. nov. (Bennettitales) from the Middle Jurassic of European Russia</article-title><trans-title-group xml:lang="ru"><trans-title>Анатомия листьев Ptilophyllum riparium Gordenko, 1999 emend. nov. (Bennettitales) из среднеюрских отложений европейской части России</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bazhenova</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Баженова</surname><given-names>Н. В.</given-names></name></name-alternatives><email>gordynat@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bazhenov</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Баженов</surname><given-names>А. В.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Borissiak Paleontological Institute, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Палеонтологический институт им. А.А. Борисяка РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-08-15" publication-format="electronic"><day>15</day><month>08</month><year>2025</year></pub-date><issue>4</issue><issue-title xml:lang="en">NO4 (2025)</issue-title><issue-title xml:lang="ru">№4 (2025)</issue-title><fpage>129</fpage><lpage>142</lpage><history><date date-type="received" iso-8601-date="2025-10-01"><day>01</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-08-29"/></permissions><self-uri xlink:href="https://bioethicsjournal.ru/0031-031X/article/view/691811">https://bioethicsjournal.ru/0031-031X/article/view/691811</self-uri><abstract xml:lang="en"><p>First data on the leaf anatomy of bennettitalean Ptilophyllum riparium Gordenko emend. nov. from the Middle Jurassic of Central Russia were obtained. It was found that P. riparium ememd. nov. exhibits general anatomical features, characteristic of bennettitalean leaves, but differs from other representatives of the genus Ptilophyllum Morris (P. sahnii Gupta et Sharma, P. amarjolense Bose, and P. nipanica Vishnu-Mittre, Lower Cretaceous of India) with known anatomical structure by significantly less degree of rachis vascular tissue dissection, continuous layer of mechanical tissue, accompanying a phloem in the abaxial part of vascular bundles ring of rachis, and by the presence of two layers of hypodermal cells underlying the upper epidermis in pinnae. It is shown that in P. riparium emend. nov., two vascular bundles depart from the vascular system of rachis to the pinna.</p></abstract><trans-abstract xml:lang="ru"><p>Получены первые данные по анатомии листьев беннеттита Ptilophyllum riparium Gordenko emend. nov. из средней юры центра европейской части России. Установлено, что P. riparium emend. nov. обнаруживает общий план строения, характерный для листьев беннеттитов, но отличается от других представителей рода Ptilophyllum Morris (P. sahnii Gupta et Sharma, P. amarjolense Bose и P. nipanica Vishnu-Mittre из нижнего мела Индии) с известным анатомическим строением, значительно меньшей степенью рассеченности проводящей системы рахиса, непрерывностью слоя механической ткани, сопровождающей флоэму в абаксиальной части кольца проводящих пучков рахиса, а также наличием в перышках двух слоев гиподермальных клеток, подстилающих верхнюю эпидерму. Показано, что у P. riparium emend. nov. к перышку от проводящей системы рахиса отходят два проводящих пучка.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Middle Jurassic</kwd><kwd>Bennettitales</kwd><kwd>Ptilophyllum</kwd><kwd>anatomy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>средняя юра</kwd><kwd>Bennettitales</kwd><kwd>Ptilophyllum</kwd><kwd>анатомия</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы благодарны Р.А. Ракитову из Палеонтологического ин-та им. А.А. Борисяка РАН (ПИН РАН) за помощь при работе на СЭМ. Мы также признательны В.Л. Шамраю (Михайловский горно-обогатительный комбинат), Н.Е Завьяловой (ПИН РАН), М.В. Теклевой (ПИН РАН) и Д.В. Збуковой (Всероссийский научно-исследовательский геологический ин-т им. А.П. Карпинского) за помощь при сборе материала.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Баженова Н.В., Баженов А.В. 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