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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">688245</article-id><article-id pub-id-type="doi">10.31857/S0031031X25030068</article-id><article-id pub-id-type="edn">EQTTPQ</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">A new species of the genus <italic>Tainoceras</italic> (Nautilida) from the Lower Carboniferous of the Moscow Syneclise</article-title><trans-title-group xml:lang="ru"><trans-title>Новый вид рода Tainoceras (Nautilida) из нижнего карбона Московской синеклизы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Monakhov</surname><given-names>V. D.</given-names></name><name xml:lang="ru"><surname>Монахов</surname><given-names>В. Д.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vasia.monahov@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Leonova</surname><given-names>T. B.</given-names></name><name xml:lang="ru"><surname>Леонова</surname><given-names>Т. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>tleon@paleo.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В. Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><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="2025-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2025</year></pub-date><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>72</fpage><lpage>81</lpage><history><date date-type="received" iso-8601-date="2025-07-24"><day>24</day><month>07</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-07-24"><day>24</day><month>07</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></permissions><self-uri xlink:href="https://journals.eco-vector.com/0031-031X/article/view/688245">https://journals.eco-vector.com/0031-031X/article/view/688245</self-uri><abstract xml:lang="en"><p>A representative of the genus <italic>Tainoceras</italic> (order Nautilida family Tainoceratidae) from the Lower Carboniferous (Protvian) of Moscow Syneclise is described for the first time. Until now, the earliest records of this genus were known from the Middle Carboniferous of North America, while on the Russian Plate, the only species known was <italic>T. trautsholdi</italic> (Waagen, 1879) from the Gzhelian Stage. The studied material enabled a complete description of the new taxon <italic>Tainoceras vashutinense</italic> sp. nov. Thus, the new find made it possible to expanding the boundaries of the stratigraphic and geographic distribution of this nautilid genus.</p></abstract><trans-abstract xml:lang="ru"><p>Впервые описан представитель рода Tainoceras Hyatt (отряд Nautilida, сем. Tainoceratidae) из нижнего карбона Московской синеклизы. До настоящего времени самые древние находки этого рода были известны из среднего карбона Северной Америки, а на территории Русской плиты был отмечен единственный вид T. trautscholdi (Waagen) из гжельского яруса. Изученный материал позволил дать полную характеристику нового вида Tainoceras vashutinense sp. nov. Эта находка позволяет расширить границы стратиграфического и географического распространения рода Tainoceras.</p></trans-abstract><kwd-group xml:lang="en"><kwd>nautilids</kwd><kwd>Tainoceratidae</kwd><kwd>Lower Carboniferous</kwd><kwd>Serpukhovian Stage</kwd><kwd>Protvian Regional Substage</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>наутилиды</kwd><kwd>Tainoceratidae</kwd><kwd>Подмосковье</kwd><kwd>нижний карбон</kwd><kwd>серпуховский ярус</kwd><kwd>протвинский горизонт</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Алексеев А.С., Гибшман Н.Б., Горева Н.В., Сахненко К.В. Каменноугольные отложения Малоярославца (Калужская область) и их биостратиграфия по фораминиферам и конодонтам // Бюлл. Моск. об-ва испыт. прир. Отд. геол. 2022. Т. 97. № 1. С. 46–73.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Алексеев А.С., Горева Н.В., Шмаков А.С. 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