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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">resar</journal-id><journal-title-group><journal-title xml:lang="ru">Природные ресурсы Арктики и Субарктики</journal-title><trans-title-group xml:lang="en"><trans-title>Arctic and Subarctic Natural Resources</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2618-9712</issn><issn pub-type="epub">2686-9683</issn><publisher><publisher-name>Академия наук Республики Саха (Якутия)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31242/2618-9712-2024-29-4-527-534</article-id><article-id custom-type="elpub" pub-id-type="custom">resar-592</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Науки о Земле. Геология и полезные ископаемые</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Earth sciences. Geology and mineral resources</subject></subj-group></article-categories><title-group><article-title>Мелкораковинная фауна из хараютехской свиты верхнего венда низовьев р. Лена, Восточная Сибирь</article-title><trans-title-group xml:lang="en"><trans-title>Small shelly fossils from the Kharayutekh Formation of the Upper Vendian period in the lower reaches of the Lena River in Eastern Siberia</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1179-899X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новожилова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Novozhilova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Новожилова Наталья Валентиновна, кандидат геолого-минералогических наук, старший научный сотрудник лаборатории палеонтологии и стратиграфии палеозоя; доцент геолого-геофизического факультета</p><p>ResearcherID: T-4479-2017, Scopus Author ID: 25228056300</p><p>г. Новосибирск</p></bio><bio xml:lang="en"><p>Novozhilova Natalya Valentinovna, Cand. Sci. (Geol. and Mineral.), Senior Researcher, Institute of Petroleum Geology and Geophysics; Associate Professor, Geology and Geophysics Department</p><p>ResearcherID: T-4479-2017, Scopus Author ID: 25228056300</p><p>Novosibirsk</p></bio><email xlink:type="simple">NovozhilovaNV@ipgg.sbras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт нефтегазовой геологии и геофизики им. А.А. Трофимука СО РАН; Новосибирский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Trofimuk Institute of Petroleum Geology and Geophysics Siberian Branch of the Russian Academy of Sciences; Novosibirsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>26</day><month>12</month><year>2024</year></pub-date><volume>29</volume><issue>4</issue><fpage>527</fpage><lpage>534</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Новожилова Н.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Новожилова Н.В.</copyright-holder><copyright-holder xml:lang="en">Novozhilova N.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://resar.elpub.ru/jour/article/view/592">https://resar.elpub.ru/jour/article/view/592</self-uri><abstract><p>Изучение скелетных проблематичных остатков из хараютехской свиты верхнего венда, вскрытой в разрезе по правому берегу р. Лена в устье руч. Улахан-Алдьярхай, позволило установить два уровня, характеризующихся находками мелкораковинной фауны (small shelly fossils) из темно-серых известняков. Первый, более древний, состоит из проблематичных скелетных остатков неясного систематического положения и двух морфологических типов ископаемых рода Tianzhushania, которые представляют собой различные стадии эмбрионального развития этого таксона. В составе второго, более молодого, кроме Tianzhushania обнаружены ханцеллорииды Chancelloria sp. и хиолиты Paragloborilus subglobosus. Материалом для исследования послужила коллекция, состоящая из нескольких десятков фосфатизированных ископаемых, полученная в результате обработки каменного материала по стандартной методике химического препарирования, путем растворения известняков в слабом растворе уксусной кислоты (3–5 %). Из полученных результатов можно сделать вывод, что Туорасисский бассейн пассивной окраины Сибирского континента в позднем венде обладал благоприятными условиями для существования и развития микрофауны рассмотренного в статье типа. Все эти находки представляют большой интерес как с палеобиологической, так и со стратиграфической точки зрения. В дальнейшем необходимо провести более детальные работы по изучению морфологии и внутреннего строения эмбрионоподобных ископаемых из хараютехской свиты разреза «Улахан-Алдьярхай» с использованием микротомографа, чтобы подтвердить их эмбриональную природу. Важно осуществить дополнительный отбор из хараютехской свиты на мелкораковинную фауну, для расширения фаунистической характеристики и усовершенствования биостратиграфической основы.</p></abstract><trans-abstract xml:lang="en"><p>The study of problematic skeletal remains from the Kharayutekh Formation of the Upper Vendian period, uncovered along the right bank of the Lena River at the mouth of the Ulakhan-Ald’yarkhay Brook, revealed two distinct levels characterized by finds of small shelly fossils embedded in dark gray limestones. The first assemblage includes problematic skeletal remains with indeterminate systematic affinities, as well as two morphological types of fossil specimens attributed to the genus Tianzhushania. These specimens represent different stages in the embryonic development of this taxonomic group. In addition to Tianzhushania, the second, younger level also contains chancellorids (Chancelloria sp.) and hyoliths (Paragloborilus subglobosus). The material for this study consisted of a collection of several dozen fossilized specimens, obtained through the standard process of chemical preparation, which involved dissolving limestone in a weak acetic acid solution (3–5 %). Based on the findings, it can be inferred that the Tuorasis Basin of the passive continental margin of Siberia during the Late Vendian period provided favorable conditions for the survival and evolution of the microflora discussed in this paper. These discoveries are of significant interest from both paleobiological and stratigraphical perspectives. In the future, it will be crucial to conduct more in-depth research on the morphological features and internal structures of the embryonic fossils found in the Kharayutekh Formation of the Ulakhan-Ald’yarkhay section, employing a microtomographic approach to validate their embryonic nature. Additionally, further sampling of small shelly fossils from the Kharayutekh Formation is essential to enhance the faunal attributes and strengthen the biostratigraphical foundation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>венд (эдиакарий)</kwd><kwd>хараютехская свита</kwd><kwd>мелкораковинная фауна</kwd><kwd>Восточная Сибирь</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Vendian (Ediacaran)</kwd><kwd>small shelly fossils</kwd><kwd>Eastern Siberia</kwd><kwd>Kharayutekh Formation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена за счет государственного задания ИНГГ СО РАН (проект № FWZZ2022-0003).</funding-statement><funding-statement xml:lang="en">This study was conducted within the framework of the state assignment for the Trofimuk Institute of Petroleum Geology and Geophysics SB RAS (No. FWZZ-2022-0003).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bengtson S., Yue Z. 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