REVUE DE MICROPALEONTOLOGIE最新文献

{"title":"From destruction to reconstruction: The paleopalynology collection of the Museu Nacional (National Museum) of Brazil after the fire","authors":"Marcelo de A. Carvalho ,&nbsp;Anna Claudia Amaral Juliace","doi":"10.1016/j.revmic.2025.100870","DOIUrl":"10.1016/j.revmic.2025.100870","url":null,"abstract":"<div><div>The fire that devastated the <em>Museu Nacional</em> of Brazil in Rio de Janeiro in 2018 led to the loss of significant portions of its scientific collections, including the paleopalynology slide archive. This article documents the evolution of the paleopalynological collection, from its historical development to the catastrophic impact of the fire, and the subsequent efforts for recovery and reconstruction. The reconstitution process involved the donation of materials from partner institutions, the preparation of new slides, and the creation of a digital infrastructure enabling remote access and long-term preservation. The integration of outreach activities and public engagement highlights the broader cultural and educational significance of the collection. By presenting the strategies and collaborative networks mobilized after the disaster, this study contributes to ongoing discussions about the preservation of scientific heritage in contexts of institutional vulnerability.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"89 ","pages":"Article 100870"},"PeriodicalIF":1.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Permian darwinulocopines (Crustacea: Ostracoda) from the Rio do Rasto Formation, Brazil","authors":"Cristianini Trescastro Bergue ,&nbsp;Maria Naumcheva ,&nbsp;Rafael Costa da Silva ,&nbsp;Marie-Béatrice Forel ,&nbsp;Fernando Antonio Sedor","doi":"10.1016/j.revmic.2025.100865","DOIUrl":"10.1016/j.revmic.2025.100865","url":null,"abstract":"<div><div>The study on Paleozoic podocopid ostracods in Brazil still lags behind the Mesozoic (mainly Cretaceous) and Cenozoic ones, and is mostly concentrated in the Paraná Basin. Consequently, we have only vague information about their diversity, distribution, and affinities to the North Hemisphere assemblages. In order to contribute to the improvement of this knowledge, this work presents a study on Late Permian Darwinulocopina from the Rio do Rasto Formation, Paraná Basin, Brazil. The vertebrate fauna associated indicates a Lopingian age for these deposits which are interpreted as a delta front to delta top environment. Nine species of darwinulocopines were recorded in the studied sample, some of them very abundant, while others very rare and represented only by a few specimens. The superfamily Darwinuloidea is represented by the genera <em>Paleodarwinula</em> Molostovskaya and <em>Wjatkellina</em> Molostovskaya, and the Suchonelloidea is represented by the genera <em>Dvinella</em> Molostovskaya and <em>Prasuchonella</em> Molostovskaya. Two new species are described: <em>Paleodarwinula moliyae</em> nov. sp. and <em>P. gregorysohni</em> nov. sp. Additionally, the occurrence of two species previously described from the Eastern European Platform (<em>Wjatkellina fragiloides</em> Zekina and <em>Prasuchonella sulacensis</em> Starozhilova) and one described in North America (<em>Paleodarwinula hollandi</em> [Scott]) demonstrate possible biostratigraphic and paleoenvironmental comparisons between the Paraná Basin and Russian Platform Assemblages, as well as North American ones.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"89 ","pages":"Article 100865"},"PeriodicalIF":1.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Historical foraminiferal collections as a resource for monitoring anthropogenic climate change","authors":"Laura J. Cotton ,&nbsp;Helena L. Filipsson","doi":"10.1016/j.revmic.2025.100873","DOIUrl":"10.1016/j.revmic.2025.100873","url":null,"abstract":"<div><div>Natural history museum collections (NHC) represent an underutilized yet valuable resource for tracking environmental changes and anthropogenic impacts on marine ecosystems. Historical samples, particularly foraminifera collected during marine expeditions from the late 1800s to mid-1900s, offer crucial baseline data pre-dating significant human influence. These collections, often accompanied by oceanographic data, can fill important knowledge gaps regarding past biodiversity, species distribution, and ecosystem health. While challenges such as limited accessibility, uncertain sample histories, and methodological inconsistencies exist, modern analytical approaches, including non-destructive imaging and machine learning, greatly enhance their usability. Here we advocate for the preservation, digitization, and strategic use of historical micropaleontological collections, emphasizing their potential for providing essential long-term ecological insights and supporting conservation and climate mitigation strategies.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"89 ","pages":"Article 100873"},"PeriodicalIF":1.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145361871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hand-held radiolarian models created using micro-CT and 3D printer","authors":"Tsuyoshi Ito ,&nbsp;Naotomo Kaneko ,&nbsp;Takuya Itaki","doi":"10.1016/j.revmic.2025.100871","DOIUrl":"10.1016/j.revmic.2025.100871","url":null,"abstract":"<div><div>Microfossils play a vital role in paleontology, geology, and paleoceanography. However, their small size makes them difficult to observe and renders them largely unfamiliar to the general public. We created enlarged models of radiolarians, representative of siliceous microfossils from the Phanerozoic, using micro-computed tomography (micro-CT) and a three-dimensional (3D) printer. The enlarged models are exhibited at the Geological Museum of the Geological Survey of Japan, AIST, and smaller models are also available for purchase. The smaller models allow the public to physically interact with microfossils. This initiative contributes to the dissemination of knowledge about radiolarians among the general public and supports the conservation of natural resources as substitutes for macrofossils.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"89 ","pages":"Article 100871"},"PeriodicalIF":1.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Foraminifera.eu physical collection","authors":"Michael Hesemann","doi":"10.1016/j.revmic.2025.100876","DOIUrl":"10.1016/j.revmic.2025.100876","url":null,"abstract":"<div><div>The Foraminifera.eu physical collection (FEUCOL) is a curated collection of both fossil and modern foraminiferal specimens, together with associated bulk samples and washed residues. It holds over 214,000 individual specimens and currently includes more than 5000 microcell slides. The emphasis is on complete assemblages, which serve as an environmental archive in space and time. The collection contains no designated type material.</div><div>As of July 2025, 6,500 specimens have been photographed, identified, and entered into the Foraminifera.eu Database (FEUDAT). FEUDAT is freely accessible through the Foraminifera.eu website and offers searches across 24 criteria, including taxonomy, morphology, geological age, geographic provenance, and collection related metadata.</div><div>The collection is run by the Foraminifera.eu Lab in Hamburg, a non-commercial citizen science initiative led by avocational scientists. Collection growth is project-driven, with contributions from team members, external researchers, and dedicated hobbyists.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"89 ","pages":"Article 100876"},"PeriodicalIF":1.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145525391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Upper Frasnian conodont biostratigraphy of the Noravank section (Central Armenia)","authors":"Meline Tsatryan ,&nbsp;Vahram Serobyan ,&nbsp;Arayik Grigoryan ,&nbsp;Nune Avagyan ,&nbsp;Taniel Danelian ,&nbsp;Vachik Hairapetian","doi":"10.1016/j.revmic.2025.100845","DOIUrl":"10.1016/j.revmic.2025.100845","url":null,"abstract":"<div><div>In order to distinguish the standard conodont biozones around the Late Frasnian critical interval in the Lesser Caucasus, the Noravank section is examined here. Our study yielded an abundant and relatively diverse conodont fauna, representative of the icriodid–polygnathid biofacies. Most notably, the carbonate interval situated at the lower part of the studied section contains <em>Icriodus alternatus alternatus, I. alternatus helmsi, I. expansus, I. excavatus, Polygnathus webbi, P. aequalis, P. politus</em> and <em>P. brevilaminus</em>. This assemblage suggests a Late Frasnian age and correlates with the <em>rhenana</em> conodont Zone <em>sensu lato</em>, thereby providing a chronostratigraphic constraint for the local brachiopod Zone <em>Ripidiorhynchus gnishikensis–Angustisulcispirifer arakelyani</em>. Conodonts obtained by some limestone intercalations within the overlying siliciclastic interval include <em>I. iowaensis iowaensis</em> and <em>P. webbi</em>, which constrain its age to the <em>linguiformis</em> Zone.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"88 ","pages":"Article 100845"},"PeriodicalIF":1.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of physicochemical parameters and potential toxic elements pollution on benthic foraminifera and ostracoda: A case study of Burullus Lagoon, Egypt","authors":"Ahmed M. BadrElDin ,&nbsp;Abd El-Monsef A. El-Badry ,&nbsp;Orabi H. Orabi","doi":"10.1016/j.revmic.2025.100852","DOIUrl":"10.1016/j.revmic.2025.100852","url":null,"abstract":"<div><div>The Burullus Lagoon, located in the northern Nile Delta in Egypt, faces significant environmental stress due to the continuous discharge of untreated agricultural runoff and the effects of aquaculture in its southern region, both of which contribute to declining water quality and to the degradation of the aquatic ecosystem. This study aimed to evaluate the effectiveness of using benthic foraminifera and ostracods as biomarkers for monitoring the ecological health of the brackish coastal Burullus Lagoon. In 2014, fourteen sediment samples were collected to assess potential toxic elements (PTEs) pollution in the sediments and evaluate the lagoon's environmental quality. Three pollution indices were calculated: contamination factor (CF), geo-accumulation index (Igeo), and enrichment factor (EF). The mean values of CF and Igeo indicated the following order: Cd &gt;&gt; Pb &gt; Co &gt; Ni &gt; Zn &gt; Cu across all sampling stations. Statistical analyses revealed no correlation between the spatial distributions of organic carbon and PTEs. The holoeuryhaline benthic foraminiferal and ostracod species <em>Ammonia tepida</em> (Cushman, 1926) and <em>Cyprideis torosa</em> dominated the benthic populations, showing tolerance to high levels of organic carbon and PTEs pollution. Low species diversity, a scarcity of living individuals, and the presence of deformed specimens may directly reflect the decline in the ecological quality of the Burullus Lagoon environment. This study highlights the deteriorating ecological health of the lagoon and underlines the utility of combined benthic foraminifera and ostracod assemblages as effective bioindicators for monitoring pollution in the brackish coastal ecosystems of the Nile Delta.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"88 ","pages":"Article 100852"},"PeriodicalIF":0.7,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144549967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The genus Hantkenina in Saudi Arabia: Implications for biostratigraphy and paleoecology across the Bartonian–Priabonian transition","authors":"Asmaa Korin ,&nbsp;Sherif Allam ,&nbsp;John D. Humphrey ,&nbsp;Abduljamiu O. Amao ,&nbsp;Korhan Ayranci ,&nbsp;Mohammed I. Najjar ,&nbsp;Ahmed A. Bahameem ,&nbsp;Iyad S. Zalmout ,&nbsp;Abdullah M. Memesh ,&nbsp;Michael A. Kaminski","doi":"10.1016/j.revmic.2025.100844","DOIUrl":"10.1016/j.revmic.2025.100844","url":null,"abstract":"<div><div>This research provides a first description and biostratigraphic analysis of <em>Hantkenina</em> species in the middle to upper Eocene Rashrashiyah Formation of the Sirhan-Turayf Basin, northwest Saudi Arabia. Seven species—<em>Hantkenina dumblei, H. australis, H. longispina, H. compressa, H. primitiva, H. alabamensis,</em> and <em>H. nanggulanensis</em>—are identified within planktonic foraminiferal biozones E13 to E14, aligning with the NP17 to NP18 calcareous nannoplankton zones. The co-occurrence of <em>H. dumblei, H. australis,</em> and <em>H. longispina</em> in the E13/NP17 Zone suggests a warm marine setting in the lower Rashrashiyah Formation, while their absence in the middle portion indicates a cooling interval, followed by a warming phase in the upper E14/NP18 Zone marked by the appearance of <em>H. compressa, H. primitiva</em>, and <em>H. alabamensis</em>. This stratigraphic transition, alongside stable isotope data (δ¹⁸O and δ¹³C) from benthic foraminifera, reflects complex temperature variations impacting species distribution. An unconformity between the Rashrashiyah and Miocene Sirhan formations points to the absence of upper Eocene and Oligocene deposits, likely due to significant eustatic sea-level fall during the Eocene–Oligocene transition and regional tectonic uplift of the Red Sea rifting and the Syrian Arc. Correlating planktonic foraminifera (E13–E14) with calcareous nannoplankton (NP17–NP18) zones improves the middle to late Eocene stratigraphy, confirming the presence of Bartonian and Priabonian sediments and challenging previous assumptions of an Eocene hiatus in Saudi Arabia. This study not only refines the Eocene stratigraphy of Saudi Arabia but also highlights the role of <em>Hantkenina</em> as a key biostratigraphic marker in global paleoecology reconstructions, strengthening worldwide Eocene correlations.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"87 ","pages":"Article 100844"},"PeriodicalIF":0.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"What is Pattersoncypris Bate (Ostracoda: Cyprididae)? A review of the genus and its species","authors":"Renata Juliana Arruda Maia ,&nbsp;Débora Almeida-Lima ,&nbsp;Juliana Guzmán ,&nbsp;Enelise Katia Piovesan","doi":"10.1016/j.revmic.2025.100833","DOIUrl":"10.1016/j.revmic.2025.100833","url":null,"abstract":"<div><div><em>Pattersoncypris</em> is a fossil ostracod genus represented by fourteen species recovered in non-marine, transitional and marine Cretaceous deposits from Brazil, Argentina, Liberia, Congo, Gabon, Angola, and Chad, and USA. As it is an abundant and diversified genus of the Early Cretaceous sedimentary basins of Brazil and Africa related to the opening of the South Atlantic Ocean, taxonomic misidentifications, which have been recurrently occurring with <em>Pattersoncypris</em> species, lead to problems regarding biostratigraphic, paleozoogeographic and paleoenvironmental interpretation. Face to this problem, the aim of this work was to study the morphological variations present in <em>Pattersoncypris</em> species, to identify the most robust diagnostic features that will allow reliable identification of the species, as well as to provide data that will facilitate understanding of the evolutionary history of the genus and its paleozoogeographic distribution. The genus was reviewed from morphological and taxonomic aspects. Ten species underwent taxonomic amendments, and a new species <em>Pattersoncypris labiata</em> n. sp. was proposed. Data analysis indicated that <em>Pattersoncypris</em> is an euryhaline genus that originated in the Gondwana continent, in the region that became the African Continent, from an ancestor of the genus <em>Hourcqia,</em> probably in the early Aptian. The adaptive radiation of the genus peaked during the Aptian, with the diversity center located in northeast Brazil. From the Albian onwards, there was a reduction in richness, with fewer species being recorded in Africa. An interval with no recorded species occurred during the early–middle Cenomanian. A single species was recorded in the late Cenomanian in USA, and by the end of this age, the genus was extinct.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"87 ","pages":"Article 100833"},"PeriodicalIF":0.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleoecology of Early Ladinian low-diversity radiolarian fauna from Mt. Svilaja (External Dinarides, Croatia)","authors":"Špela Goričan ,&nbsp;Tea Kolar-Jurkovšek ,&nbsp;Dunja Aljinović ,&nbsp;Tamara Troskot-Čorbić ,&nbsp;Bogdan Jurkovšek","doi":"10.1016/j.revmic.2025.100841","DOIUrl":"10.1016/j.revmic.2025.100841","url":null,"abstract":"<div><div>Dark-grey cherty limestone from Mt. Svilaja contains moderately well-preserved radiolarians of unusually low diversity. Nineteen genera were encountered, namely, only one fourth of genera known from the time equivalent Buchenstein Formation. Based on conodonts, the studied interval is assigned to the Lower Ladinian <em>Budurovignathus hungaricus</em> Zone. Ammonoids and allochthonous fossil elements (calcareous algae, corals, brachiopods, bivalves, benthic foraminifera, terrestrial-plant remains) from the same interval were previously reported. Facies and organic-matter analyses support the interpretation of depositional setting in a semi-enclosed basin with oxygen-deficient bottom waters. The radiolarian assemblage consists of spherical Entactinaria (Pentactinocarpidae, Heptacladidae, Hindeosphaeridae) and Spumellaria (<em>Archaeocenosphaera, Paurinella, Triassospongosphaera, Spongopallium</em>), and monocyrtid Nassellaria (mostly <em>Hozmadia</em>). Among Pentactinocarpidae, <em>Lobactinocapsa ellipsoconcha</em> Dumitrica is abundant and characterized by considerable variability of the cortical shell regarding its shape (ovoid to spherical), wall thickness (single-layered to spongy), and number of external spines. Eptingiidae, Oertlispongidae, Relindellidae, and all multicyrtid Nassellaria, common in the Buchenstein Formation as well as in radiolarian cherts associated with ophiolites, are missing. Similar, although less drastically reduced radiolarian fauna is known from the coeval San Giorgio Dolomite, which was also deposited in an oxygen-deficient intra-platform basin. The San Giorgio fauna lacks multicyrtid Nassellaria but still contains abundant Eptingiidae, Oertlispongidae, and Relindellidae. The likely factor reducing the diversity in the intra-platform basins was the vertical extent of the oxygen-deficient lower water column. Only surface-dwelling radiolarians were successful in stratified basins with expanded deep-water hypoxia.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"87 ","pages":"Article 100841"},"PeriodicalIF":0.7,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}