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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">673294</article-id><article-id pub-id-type="doi">10.31857/S0031031X24020027</article-id><article-id pub-id-type="edn">FJDWGY</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">New Spheromorphic Problematics Gaparella from the Lower Cambrian of Western Mongolia</article-title><trans-title-group xml:lang="ru"><trans-title>Новые сфероморфные проблематики Gaparella из Нижнего Кембрия Западной Монголии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Luzhnaya</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Лужная</surname><given-names>Е. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>serezhnikova@mail.ru</email><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="2024-11-04" publication-format="electronic"><day>04</day><month>11</month><year>2024</year></pub-date><issue>2</issue><fpage>23</fpage><lpage>31</lpage><history><date date-type="received" iso-8601-date="2025-02-27"><day>27</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</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/673294">https://journals.eco-vector.com/0031-031X/article/view/673294</self-uri><abstract xml:lang="en"><p>From the lower part of the Tommotian Stage of the Lower Cambrian of Western Mongolia, ridge Hevte-Tsakhir-Nuruu described a new problematical sphaeromorhical microfossils <italic>Gaparella elenae</italic> sp. nov.; a new combination of generic and specific names <italic>Gaparella kuanchuanpuensis</italic> (Qian, 1977). has been proposed. Despite its very peculiar morphology, the genus <italic>Gaparella</italic> Missarzhevsky in Missarzhevsky et Mambetov, 1981 is more often mentioned in the list of synonyms of the genus <italic>Archaeooides</italic> Qian, 1977. The taphonomic variability of Mongolian <italic>Gaparella</italic> is shown and the morphology is reconstructed: these were hollow spheres, with a perforated double thin wall; between the holes, which were located chaotically on small elevations, a system of canals was developed; the wall may have been organic with an admixture of mineral components. Based on their lifestyle, these fossils were probably planktonic filter feeders. Their level of organization appears to have been consistent with Porifera; most likely these were juvenile forms.</p></abstract><trans-abstract xml:lang="ru"><p>Из низов томмотского яруса нижнего кембрия Западной Монголии, хр. Хэвтэ-Цахир-Нуруу, описаны проблематичные сфероморфные микрофоссилии рода Gaparella Missarzhevsky in Missarzhevsky et Mambetov, 1981. Предложена новая таксономическая комбинация Gaparella kuanchuanpuensis (Qian, 1977). Несмотря на весьма своеобразную морфологию, род Gaparella Missarzhevsky in Missarzhevsky et Mambetov, 1981 чаще упоминают в списке синонимов рода Archaeooides Qian, 1977. Показана тафономическая изменчивость монгольских Gaparella, реконструирована их морфология: это были сферы, с перфорированной двойной тонкой стенкой; стенка была пористой; поры располагались хаотично на небольших бугорках и гребнях, между ними была развита система полостей; стенка, возможно, была органической с примесью минеральных компонентов. Предполагается, что по образу жизни эти ископаемые могли быть планктонными фильтраторами. Уровень их организации, по-видимому, соответствовал Porifera; скорее всего, это были ювенильные формы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Mongolia</kwd><kwd>Lower Cambrian</kwd><kwd>Porifera</kwd><kwd>SSF</kwd><kwd>spherical problematics</kwd><kwd>fossilization</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Монголия</kwd><kwd>нижний кембрий</kwd><kwd>Porifera</kwd><kwd>SSF</kwd><kwd>сферические проблематики</kwd><kwd>фоссилизация</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">РФФИ</institution></institution-wrap><institution-wrap><institution xml:lang="en">RFBR</institution></institution-wrap></funding-source><award-id>20-55-44010</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Есакова Н.В., Жегалло Е.А. Биостратиграфия и фауна нижнего кембрия Монголии. М.: Наука, 1996. 216 с. (Тр. Совм. Росс.-Монгол. палеонтол. экспед. 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