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The Cretaceous–Paleogene Boundary in the Shapsug Section (Southern Slope of the Northwestern Caucasus) 沙普苏格地段（西北高加索南坡）的白垩纪-古近纪界线
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030123600270
D. V. Kochergin, N. V. Granovskaya
{"title":"The Cretaceous–Paleogene Boundary in the Shapsug Section (Southern Slope of the Northwestern Caucasus)","authors":"D. V. Kochergin, N. V. Granovskaya","doi":"10.1134/s0031030123600270","DOIUrl":"https://doi.org/10.1134/s0031030123600270","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A silicite horizon corresponding to the global catastrophic event at the Cretaceous–Paleogene boundary was found for the first time in the flysch sequence of the Shapsug section on the southern slope of the Northwest Caucasus. Assemblages of radiolarians and planktonic foraminifers dating the host beds were identified. Mineralogical and analytical data support the presence of tectites, impact minerals, and increased iridium content in the boundary bed of the studied section.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Patterns of Change in Radiolarian Associations in the Early Tournaisian (Mississippian) and Kungurian (Cisuralian) in Eastern European Russia 俄罗斯东欧早图尔奈斯期（密西西比期）和昆古里亚期（西苏拉期）放射虫组合的变化模式
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030123600233
M. S. Afanasieva
{"title":"Patterns of Change in Radiolarian Associations in the Early Tournaisian (Mississippian) and Kungurian (Cisuralian) in Eastern European Russia","authors":"M. S. Afanasieva","doi":"10.1134/s0031030123600233","DOIUrl":"https://doi.org/10.1134/s0031030123600233","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>There are important morphological differences between the dominant higher taxa (classes) in associations of radiolarians that inhabited different depths of paleobasins. A similar inversion of dominant radiolarian taxa can be seen in the Early Tournaisian (Mississippian) and the Kungurian (Cisuralian) and may indicate a change in their habitat from deeper conditions dominated by porous Sphaerellaria, to shallower shelf environments, in which spongy-lattice Spumellaria prevailed.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ancient Species of the Genus Dvinosaurus (Temnospondyli, Dvinosauria) from the Permian Sundyr Tetrapod Assemblage of Eastern Europe 东欧二叠纪巽他四足动物群中的Dvinosaurus属（Temnospondyli，Dvinosauria）古老物种
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030123600336
A. V. Uliakhin, V. K. Golubev
{"title":"Ancient Species of the Genus Dvinosaurus (Temnospondyli, Dvinosauria) from the Permian Sundyr Tetrapod Assemblage of Eastern Europe","authors":"A. V. Uliakhin, V. K. Golubev","doi":"10.1134/s0031030123600336","DOIUrl":"https://doi.org/10.1134/s0031030123600336","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The oldest species of the genus <i>Dvinosaurus</i> Amalitzky, 1921—<i>Dvinosaurus gubini</i> sp. nov.—is described from the Sundyr-1 reference locality of the Sundyr faunal assemblage of Eastern Europe (Upper Permian, Upper Severodvinian, <i>Suchonica vladimiri</i> Assemblage Zone) based on abundant bone material. The diagnostic criteria for the new species are its smaller size compared to other dvinosaurs, the narrowest skull, a short and wide zygomatic bone, and the parasphenoid body with a wider base of the cultriform process, which is well ossified with the basisphenoid; a strongly curved dentary with a well-defined symphysial crest extending downward from the labial side of the symphysial surface and, in some cases, with a single symphysial tusk, a large angle (135°–152°) between the clavicular plate and dorsal process of the clavicle, narrow areas of the interclavicle for insertion of the clavicles, and a narrow entepicondylus of the humerus. The small size, narrow skull, single symphysial tusk, and hypocentrum morphology make the new form similar to the basal Dvinosauria, in particular, to ancestral Trimerorhachidae.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Jurassic Bryozoans of the Family Eleidae (Melicerititida, Stenolaemata) 侏罗纪象科（Meliceritida, Stenolaemata）的岩毛目动物
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030123600269
L. A. Viskova
{"title":"Jurassic Bryozoans of the Family Eleidae (Melicerititida, Stenolaemata)","authors":"L. A. Viskova","doi":"10.1134/s0031030123600269","DOIUrl":"https://doi.org/10.1134/s0031030123600269","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Skeletal morphology of bryozoans of the family Eleidae d’Orbigny, 1852 (Melicerititida, Stenolaemata) and of three of its species from the Middle Callovian (Middle Jurassic) of the Moscow region—<i>Elea lyapini</i> Viskova, 2011, <i>E. troshkovensis</i> Viskova, 2011, and <i>E. taylori</i> Viskova, 2011 was analyzed, confirming that these species belong to the family Eleidae. Along with opercula (calcareous and possibly non-calcareous) and eleozooids (heterozooids), they are characterized by funnel-shaped autozooids, facettes and the distal position of apertures with a straight proximal edge, the absence of peristomes and a number of other characters. This morphology is considered to have resulted from the restructuring of the basic plan of the cylindrical autozooid of tubuliporid bryozoans that happened after the Permian–Triassic crisis at the time of the first radiation of bryozoans during the extensive Callovian transgression.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Long Bone Morphology and Histology of the Stem Salamander Kulgeriherpeton ultimum (Caudata, Karauridae) from the Lower Cretaceous of Yakutia 雅库特下白垩统茎螈 Kulgeriherpeton ultimum（穴居动物，螈科）的长骨形态学和组织学
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030124010076
P. P. Skutschas, P. G. Saburov, A. V. Uliakhin, V. V. Kolchanov
{"title":"Long Bone Morphology and Histology of the Stem Salamander Kulgeriherpeton ultimum (Caudata, Karauridae) from the Lower Cretaceous of Yakutia","authors":"P. P. Skutschas, P. G. Saburov, A. V. Uliakhin, V. V. Kolchanov","doi":"10.1134/s0031030124010076","DOIUrl":"https://doi.org/10.1134/s0031030124010076","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The morphology and histological structure of the humerus and femora of the stem karaurid salamander <i>Kulgeriherpeton ultimum</i> Skutschas et al., 2018, from the Lower Cretaceous Teete locality, Republic of Sakha (Yakutia) is described. The microanatomical and histological structure of <i>K. ultimum</i> is characterized by the presence of a thick compact primary cortex formed by a parallel-fibered bone; the absence (in the humerus) or presence of a small medullary cavity in the mid-diaphysis; the presence of a medullary cavity expanding towards the epiphyses, which continues in the proximal and distal parts as a complex network of branching canals, partially replaced by erosion bays; the presence of primary vascular canals and growth marks in the primary cortex; the presence of remnants of unresorbed cartilage and the Kashchenko’s line; active secondary remodeling with the formation of erosion bays similar to those in large-sized salamanders (other stem karaurid salamanders and cryptobranchids). Skeletochronological analysis of the humerus of <i>K. ultimum</i> showed that, at the time of the animal’s death, its individual age was 13–16 years, and the absence of a reduction in the distance between cyclic growth marks in the peripheral part of the cortex indicates that it belonged to an actively growing individual that had not reached its maximum possible size. The similarity in the morphology of the humerus and femur of <i>K. ultimum</i> and extant aquatic neotenic salamanders (absence of a dorsal crest on the humerus for the attachment of m. subcoracoscapularis, lower, forward-displaced trochanter of the femur, and shallow ventral fossa (fossa trochanterica) on the femur), as well as the presence of remnants of cartilage and preservation of Kashchenko’s line in the internal structure of limb bones, confirm conclusions about aquatic life style and neotenic nature of stem karaurid salamanders.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140882785","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ornithosuchidae—Early Archosaurs with a Hyperspecialized Jaw Apparatus 鸟喙龙--具有超特化下颌装置的早期古龙
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030124010064
A. G. Sennikov
{"title":"Ornithosuchidae—Early Archosaurs with a Hyperspecialized Jaw Apparatus","authors":"A. G. Sennikov","doi":"10.1134/s0031030124010064","DOIUrl":"https://doi.org/10.1134/s0031030124010064","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Early archosaurs included a range of ecological types—from predators to herbivores and from terrestrial to semi-aquatic forms. Members of the family Ornithosuchidae, traditionally considered active predators, occupy a special position. Their characteristic jaw apparatus structure and the morphology of their postcranial skeleton suggest the development of a unique ecological type among archosaurs, namely, a medium-sized hyperanisodont macrophagous predator. At the same time, some analogs can be noted between ornithosuchids, saber-toothed therapsids, and mammals.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A New Radiolarian Species Pseudodictyomitra venusta sp. nov. from the Coniacian–Santonian Deposits of Perapedhi Formation, Cyprus 来自塞浦路斯佩拉佩德地层科尼亚期-山顶期矿床的新放射虫物种 Pseudodictyomitra venusta sp.
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030124010027
L. G. Bragina
{"title":"A New Radiolarian Species Pseudodictyomitra venusta sp. nov. from the Coniacian–Santonian Deposits of Perapedhi Formation, Cyprus","authors":"L. G. Bragina","doi":"10.1134/s0031030124010027","DOIUrl":"https://doi.org/10.1134/s0031030124010027","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Numerous representatives of the genus <i>Pseudodictyomitra</i> Pessagno, 1977 were studied from the Upper Cretaceous of the Perapedhi Formation (Cyprus). The new species <i>P. venusta</i> sp. nov. is described. The description and stratigraphic range of <i>P. crassa</i> Bragina, 2013 are emended.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611787","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
First Specimens of the Cornutan Stylophoran Phyllocystis (Echinodermata) in the Ordovician (Volkhov Regional Stage, Dapingian and Darriwilian) of Baltica and Special Aspects of Stylophoran Axial Symmetry 波罗的海奥陶纪（沃尔霍夫地区阶段、达平纪和达里维利纪）粟米瓣柱孢藻（棘皮动物门）的首个标本以及柱孢藻轴对称的特殊方面
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030123600300
S. V. Rozhnov, G. A. Anekeeva
{"title":"First Specimens of the Cornutan Stylophoran Phyllocystis (Echinodermata) in the Ordovician (Volkhov Regional Stage, Dapingian and Darriwilian) of Baltica and Special Aspects of Stylophoran Axial Symmetry","authors":"S. V. Rozhnov, G. A. Anekeeva","doi":"10.1134/s0031030123600300","DOIUrl":"https://doi.org/10.1134/s0031030123600300","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Two new species of cornutan stylophora of the genus <i>Phyllocystis</i> are described from the Volkhov Regional Stage (Middle Ordovician, Dapingian) of Baltica. This indicates a biogeographic connection between the Afro-European part of Gondwana and Baltica since the very beginning of the Middle Ordovician. Both species were confined to cold-water, shallow basins with low water mobility. Analysis of the axial symmetry of stylophorans and the location of the hydropore indicates the absence of torsion in their ontogeny and the location of the ambulacral system to the right of their anteroposterior axis. To explain this morphology, two alternative hypotheses are proposed: (1) inversion in the development of right and left coeloms; (2) inverted state of stylophorans compared to other invertebrates, in which respect they resemble chordates in terms of the position of the dorsal and ventral sides.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microstructure of the Valves of the Genus Praeoehlertella Mergl (Family Discinidae) from the Upper Devonian of Kazakhstan 哈萨克斯坦上泥盆世蝶形花科蝶形花属瓣膜的显微结构
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030123600312
T. N. Smirnova, Yu. A. Gatovsky, E. A. Zhegallo
{"title":"Microstructure of the Valves of the Genus Praeoehlertella Mergl (Family Discinidae) from the Upper Devonian of Kazakhstan","authors":"T. N. Smirnova, Yu. A. Gatovsky, E. A. Zhegallo","doi":"10.1134/s0031030123600312","DOIUrl":"https://doi.org/10.1134/s0031030123600312","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The shell microstructure of the rare lingulate genus <i>Praeoehlertella</i> Mergl, 2001 from the Famennian of Kazakhstan is studied. The structure of the shell matrix and the secondary granular layer are studied using scanning electron microscope. Imprints of cells of the inner mantle epithelium are discovered.</p>","PeriodicalId":19816,"journal":{"name":"Paleontological Journal","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A New Spheromorphic Problematic of the Genus Gaparella from the Lower Cambrian of Western Mongolia 蒙古西部下寒武统 Gaparella 属的一种新的非球形态问题动物
IF 0.6 4区 地球科学
Paleontological Journal Pub Date : 2024-04-16 DOI: 10.1134/s0031030123600282
E. A. Luzhnaya
{"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":"https://doi.org/10.1134/s0031030123600282","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":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140611506","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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