Geobios最新文献

{"title":"","authors":"Mickaël Lhéritier","doi":"10.1016/j.geobios.2025.05.007","DOIUrl":"10.1016/j.geobios.2025.05.007","url":null,"abstract":"","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Page 107"},"PeriodicalIF":1.6,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050589","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}

{"title":"","authors":"Adolfo Pacheco-Castro","doi":"10.1016/j.geobios.2025.05.001","DOIUrl":"10.1016/j.geobios.2025.05.001","url":null,"abstract":"","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"91 ","pages":"Pages 103-104"},"PeriodicalIF":1.6,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314655","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}

{"title":"Earliest Swintonia (Anacardiaceae) fossil from the late Paleogene of India suggests its Gondwanan origin","authors":"Harshita Bhatia ,&nbsp;Gaurav Srivastava","doi":"10.1016/j.geobios.2025.05.008","DOIUrl":"10.1016/j.geobios.2025.05.008","url":null,"abstract":"<div><div>The Anacardiaceae family plays a vital ecological and economic role in tropical and subtropical regions globally. The genus <em>Swintonia</em> Griff. being an evergreen genus is confined largely to Southeastern Asia. This study reports the earliest fossil record of <em>Swintonia</em> from the late Oligocene (∼24–23 Ma) sediments of the Makum Coalfield, Assam, northeast India, offering new insights into the evolutionary history of the genus. The fossil leaf described here represents the species <em>Swintonia floribunda</em> Griff., placing it within the subfamily Anacardioideae. This finding supports the Gondwanan origin of the Anacardiaceae family, where India plays a pivotal role in its early diversification and dispersal. Further, it enriches the Paleogene fossil record of the family and suggests an Indian origin for the genus, followed by its subsequent migration to Southeast Asia. The presence of <em>Swintonia</em> in the late Oligocene indicates that the genus emerged earlier than previously thought, thriving in the warm and humid climate of the Indian subcontinent. This finding enhances our understanding of its evolutionary development and biogeographic distribution.</div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Pages 13-24"},"PeriodicalIF":1.6,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050514","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}

{"title":"Boreal ammonites from the Brno Carbonate Platform (Czechia): High-resolution biostratigraphy of the Middle–Upper Jurassic boundary","authors":"Petr Hykš ,&nbsp;Tomáš Kumpan","doi":"10.1016/j.geobios.2025.05.006","DOIUrl":"10.1016/j.geobios.2025.05.006","url":null,"abstract":"<div><div><span>This study provides a taxonomic and biostratigraphic evaluation of Boreal ammonites<span> from the erosional relics of the Brno Carbonate Platform (Czech Republic) located on the northern shelf of the </span></span>Tethys<span> Ocean during the Jurassic. Several sections were studied in the Brno-Hády and Olomučany areas. Ammonite taxonomy and biostratigraphy<span><span><span> of these typical localities of the Brno Carbonate Platform was presented more than 90 years ago, and it has not been updated since then. In our study, we present a new collection of mainly Boreal cardioceratid ammonites with short stratigraphic range covering an interval between the uppermost Callovian Lamberti Zone to the lower Oxfordian Cordatum Zone. The immigration of Boreal ammonites to the studied area corresponds to the maximum of the ‘Boreal Spread’ event, which was the greatest southward expansion in the evolutionary history of the ammonite family Cardioceratidae and a major bio-event at the Middle–Late Jurassic (Callovian–Oxfordian) transition. The high-resolution stratigraphy of Callovian-Oxfordian transitional succession is provided for the first time for the Brno Carbonate Platform. The occurrences of the latest Callovian–early Oxfordian Boreal ammonites in the Brno Carbonate Platform indicate a direct marine connection with the Boreal Province during the Lamberti–Cordatum zones range. We also provide new data on the palaeobiodiversity and </span>palaeobiogeography of Boreal ammonites and some remarks on the </span>palaeogeography of the northern margin of the Tethys Ocean. The most probable migration route for Boreal ammonites was the Moravian Gate, connecting the Brno Carbonate Platform and the Polish Basin.</span></span></div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Pages 25-43"},"PeriodicalIF":1.6,"publicationDate":"2025-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050515","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}

{"title":"Palaeoecological insight into the Badenian Sea – Middle Miocene palaeoenvironments from the North Croatian Basin, Central Paratethys","authors":"Monika Milošević ,&nbsp;Vlasta Ćosović ,&nbsp;Valentina Hajek-Tadesse ,&nbsp;Ines Galović ,&nbsp;Mirjana Miknić ,&nbsp;Viktória Baranyi","doi":"10.1016/j.geobios.2025.05.005","DOIUrl":"10.1016/j.geobios.2025.05.005","url":null,"abstract":"<div><div><span><span><span>During the Badenian (Langhian–early Serravallian), a high diversity marine biocenosis inhabited the warm, normal-salinity environments spanning the </span>epicontinental sea<span> of the Alpine-Carpathian-Dinarides region known as Central Paratethys<span>. The 95 m thick sedimentary succession of the Striježevica core, located in the southwestern part of the Pannonian Basin (North Croatian Basin), provides a unique insight into the palaeoenvironmental evolution from this part of the Paratethys, including changes in water depth, salinity, oxygen, and nutrient levels. An integrated analysis, including calcareous </span></span></span>nannoplankton<span><span>, dinoflagellate cysts, benthic and planktonic foraminifera, </span>ostracods, and diversity proxies, revealed three phases of palaeoenvironmental evolution. The stratigraphic position of the studied succession in the NN4/5 Zone is indicated by the nannoplankton assemblage with </span></span><em>Helicosphaera waltrans</em>, along with the presence of the planktonic foraminifera <em>Orbulina suturalis,</em> and the dinoflagellate cyst <em>Unipontidinium aquaeductus</em><span><span>, correlated to the Middle Miocene Badenian stage. Micropalaeontological proxies indicated shelf to upper slope environments under the influence of shallow-water conditions. At the base of the Striježevica core, the composition of small benthic foraminiferal assemblages and their diversity indices indicated a eutrophic-mesotrophic environment with constant nutrient input. A “transitional environment” in the middle part of the Striježevica core was characterized by </span>eutrophication<span> related to the fertilization effect of enhanced volcanic activity in the surrounding area. A shallowing upward trend is suggested by an increase in oxygen content at the sea bed, a decrease in species richness, and a diversity drop in the benthic foraminiferal assemblage. The upper part of the section depicted a shallow, oligotrophic environment<span> with seagrass meadows evidenced by the predominance of </span></span></span><em>Biasterigerina planorbis</em> and cibicidoids.</div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Pages 45-64"},"PeriodicalIF":1.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050516","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}

{"title":"Newly discovered Middle Jurassic dinosaur tracks in the Baladeh region and faunal changes in northern Iran","authors":"Lida Xing ,&nbsp;Nasrollah Abbassi ,&nbsp;Qiyan Chen","doi":"10.1016/j.geobios.2025.05.004","DOIUrl":"10.1016/j.geobios.2025.05.004","url":null,"abstract":"<div><div>During the Triassic–Jurassic period, the West Asian region was situated in the coastal area of Northern Tethys and served as a key paleobiogeographic link between European and Asian faunal evolution. However, the Early Mesozoic tetrapod record from this region is relatively limited in contrast to Iran, which is situated in south-eastern West Asia and predominantly characterized by track records. This study presents new tracksites discovered in the early Middle Jurassic of the Baladeh region, southern margin of the North-Central zone Alborz Mountains in northern Iran. These sites are characterized by the dominance of basal ornithischian tracks, <em>Anomoepus</em>, alongside <em>Brontopodus</em>-like sauropod trackways and the occurrence of tiny tetrapod swimming track. The inclusion of various herbivores of the Middle Jurassic Baladeh ichnofauna was possibly influenced by the change in climate and vegetal resources, as well as by the contemporaneous ornithischian radiation center in southwest China. Testing this hypothesis will require the discovery of additional fossil evidence from the Middle East and Eastern Asia.</div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Pages 77-92"},"PeriodicalIF":1.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050518","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}

{"title":"First palynological record from Corcovado, central Patagonia, Argentina: Evidence for an age between the late Eocene and the Miocene","authors":"Sol Noetinger ,&nbsp;Roberto Román Pujana ,&nbsp;Juan Leandro García Massini ,&nbsp;Viviana Dora Barreda ,&nbsp;Inés Aramendía","doi":"10.1016/j.geobios.2025.01.001","DOIUrl":"10.1016/j.geobios.2025.01.001","url":null,"abstract":"<div><div>We present the first palynological record from the Corcovado locality in Chubut, central Patagonia, Argentina. The analyzed stratigraphic section, tentatively attributed to the Huitrera Formation, yielded a single productive horizon containing spores, pollen grains, and fungal remains, despite generally poor preservation. A total of 38 species were identified, comprising 22 angiosperms, 2 gymnosperms, 9 pteridophytes, and 5 distinct fungal morphotypes. The Nothofagaceae family is notably dominant, accounting for approximately 50% of the identified palynoflora, with no warm-climate adapted taxa recorded. Ordination analyses suggest that the studied assemblage reflects terrestrial environments consistent with other Cenozoic deposits in Patagonia; however, it lacks sufficient resolution for precise age determination, suggesting a late Eocene or younger age. Its stratigraphic position, underlying the Miocene Ñorquinco/Ñirihuau Formation, constrains its minimum age, suggesting a late Eocene to Miocene age interval for the analyzed section. The study contributes to the understanding of the paleoenvironmental and paleoclimatic conditions of the region, revealing vegetation patterns typical of terrestrial ecosystems. Furthermore, it addresses a significant gap in paleobotanical research in central Patagonia, an area that has been comparatively underexplored relative to other parts of the region.</div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Pages 65-75"},"PeriodicalIF":1.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050517","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}

{"title":"Morphology and growth factors of the Cambrian oncoids in the Shuangquan section, China","authors":"Yidan Zhu","doi":"10.1016/j.geobios.2025.05.003","DOIUrl":"10.1016/j.geobios.2025.05.003","url":null,"abstract":"<div><div>The strata of the Xuzhuang Formation in the Shuangquan section of the North China Platform show continuous outcrops with various oncoids that lack conspicuous laminates microscopically. This study offers a comprehensive analysis of the distinct oncoids present in the Xuzhuang Formation in the Shuangquan section. Macroscopically, the orientation of the long axis of the oncoids presents different angles with the bedding surface, indicating growth in a turbulent, high-energy environment. Microscopically, the oncoids can be classified into five types based on morphological disparities: suborbicular, elliptical, elongated, rod-shaped, and irregular oncoid, with the nucleus predominantly situated near the center of the oncoid in most instances. Notably, these oncoids reveal filamentous calcified cyanobacteria fossils. This suggests that oncoid formation is the intricate result of calcification processes within biofilms and microbial mats dominated by cyanobacteria. Microscopic examination also reveals residual microbial mats and eroded oncoids. As a result, it is posited that the proper hydrodynamic energy, incident light conditions, and microbial activity constitute the three principal factors driving oncoid development in the Shuangquan section. Consequently, our findings not only present a representative instance of the diversity of Cambrian oncoids on the North China Platform, but also allow for a better understanding of the environment and process of oncoid formation.</div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Pages 93-105"},"PeriodicalIF":1.6,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050519","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}

{"title":"New fossil Asian palm civets (Carnivora, Viverridae) from the Siwaliks of Pakistan","authors":"Sayyed Ghyour Abbas ,&nbsp;Camille Grohé ,&nbsp;Ari Grossman ,&nbsp;Khalid Mahmood ,&nbsp;Muhammad Adeeb Babar ,&nbsp;Muhammad Akbar Khan","doi":"10.1016/j.geobios.2025.05.002","DOIUrl":"10.1016/j.geobios.2025.05.002","url":null,"abstract":"<div><div>The Neogene fossil record of Asian palm civets (Viverridae of the subfamilies Paradoxurinae and Hemigalinae) is extremely rare and scarce, and until now mostly restricted to Africa. Here we describe two new species of extinct Asian palm civets from the Siwaliks of Pakistan. Two isolated lower carnassial teeth were collected from Upper Miocene deposits of the Dhok Pathan Formation in the vicinity of Hasnot, Jhelum, and from Middle Miocene deposits of the Chinji Formation in Kanhatti, Khushab, Punjab province of Pakistan. The Hasnot specimen belongs to the genus <em>Mioparadoxurus</em>, previously reported from Haritalyangar, a Late Miocene locality of northern India. The unique morphology of the specimen (e.g., larger and stouter paraconid, high-crowned talonid with three cuspids, talonid larger than trigonid, undivided paraconid and hypoconulid), in addition to its small size, allows us to attribute it to the new species <em>Mioparadoxurus micros</em> nov. sp. This occurrence extends the geographical range of the genus into Pakistan. <em>Mioparadoxurus</em> is closely related to the extant palm civet <em>Paradoxurus</em> and thus constitutes one of the rare fossil members of the subfamily Paradoxurinae in Asia. The Kanhatti specimen is also unique in its morphology. It is small, has low hypoconid cusplets, and a unique combination of characters of its talonid cuspids. We attribute this lower carnassial to the new genus and species <em>Parakichechia sikandari</em> nov. gen., nov. sp., which shows similarities to the extinct African genus <em>Kichechia</em>, placed in either the subfamily Paradoxurinae or Hemigalinae. Although the material of these two new species does not permit full investigation of phylogenetic relationships between fossil and extant palm civets, it highlights the importance of South Asian Neogene deposits for understanding the evolutionary history of modern Asian faunas.</div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"92 ","pages":"Pages 1-12"},"PeriodicalIF":1.6,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145050512","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}

{"title":"Muroid rodents from the Lower Siwalik deposits near Ramnagar (Jammu and Kashmir), India: Biostratigraphic implication","authors":"Varun Parmar ,&nbsp;Rigzin Norboo ,&nbsp;Deepak Singh Kshetrimayum ,&nbsp;Rahul Magotra","doi":"10.1016/j.geobios.2024.12.003","DOIUrl":"10.1016/j.geobios.2024.12.003","url":null,"abstract":"<div><div>Various Lower Siwalik localities within the Ramnagar basin in Northwestern Jammu Himalaya (India) are known to yield diverse Miocene fossil mammals. However, as neither magnetostratigraphic ages nor radiometric dates are available, absolute temporal constraints on the fossiliferous horizons are missing. Some age diagnostic fauna recorded from the Ramnagar area has been utilized to date some fossil productive horizons such as Kalaunta 2 (K2), Dehari 1 (D1), Dehari 2 (D2), and Basi. In the present work murine dentition recovered from the Lower Basi (LB) site is reported. Based on the micromammalian assemblage at K2, D1 and LB, the fossiliferous horizons are placed in a composite stratigraphic column of the Ramnagar Basin. Variation of micromammalian content across these three fossiliferous horizons document dominance of cricetid rodents and absence of rhizomyine rodents at K2 site, abundance of rhizomyine rodents and scarcity of cricetid rodents at D1 site, and absence of cricetids rodents but presence of rhizomyine and murine rodents in the LB site.</div></div>","PeriodicalId":55116,"journal":{"name":"Geobios","volume":"91 ","pages":"Pages 89-101"},"PeriodicalIF":1.6,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314654","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}