{"title":"A New Spheromorphic Problematic of the Genus Gaparella from the Lower Cambrian of Western Mongolia","authors":"E. A. Luzhnaya","doi":"10.1134/s0031030123600282","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A new problematic spheromorphic microfossil <i>Gaparella elenae</i> sp. nov. is described from the lower Tommotian (Lower Cambrian) in the Hevte-Tsakhir-Nuruu Ridge, Western Mongolia, and a new combination <i>Gaparella kuanchuanpuensis</i> (Qian, 1977) is proposed. Despite its very peculiar morphology, the genus <i>Gaparella</i> Missarzhevsky in Missarzhevsky and Mambetov, 1981 is usually considered as a junior synonym of the genus <i>Archaeooides</i> Qian, 1977. The taphonomic variability of Mongolian specimens of <i>Gaparella</i> is demonstrated, and their morphology is reconstructed: these were hollow spheres, with a thin perforated double-layered wall; with a system of cavities between the pores, which were scattered on small elevations, with a system of canals in between; the wall may have been organic with an admixture of mineral components. These fossils were probably planktonic filter feeders. Their level of organization appears to be consistent with Porifera; most likely these were juvenile forms.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":"33 1","pages":""},"PeriodicalIF":0.7000,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Paleontological Journal","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1134/s0031030123600282","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PALEONTOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
A new problematic spheromorphic microfossil Gaparella elenae sp. nov. is described from the lower Tommotian (Lower Cambrian) in the Hevte-Tsakhir-Nuruu Ridge, Western Mongolia, and a new combination Gaparella kuanchuanpuensis (Qian, 1977) is proposed. Despite its very peculiar morphology, the genus Gaparella Missarzhevsky in Missarzhevsky and Mambetov, 1981 is usually considered as a junior synonym of the genus Archaeooides Qian, 1977. The taphonomic variability of Mongolian specimens of Gaparella is demonstrated, and their morphology is reconstructed: these were hollow spheres, with a thin perforated double-layered wall; with a system of cavities between the pores, which were scattered on small elevations, with a system of canals in between; the wall may have been organic with an admixture of mineral components. These fossils were probably planktonic filter feeders. Their level of organization appears to be consistent with Porifera; most likely these were juvenile forms.
期刊介绍：
Paleontological Journal (Paleontologicheskii zhurnal) is the principal Russian periodical in paleontology. The journal publishes original work on the anatomy, morphology, and taxonomy of fossil organisms, as well as their distribution, ecology, and origin. It also publishes studies on the evolution of organisms, ecosystems, and the biosphere and provides invaluable information on global biostratigraphy with an emphasis on Eastern Europe and Asia.
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