Pub Date : 2026-01-30DOI: 10.1016/j.revmic.2026.100900
Valentina Hajek Tadesse , Katarina Krizmanić
Here, we present the collection of ostracod type specimens described by Prof. Ana Sokač, housed at the Croatian Natural History Museum in Zagreb (CNHM). Among of the 33 previously described new taxa, 30 are preserved and currently accessible, including 29 species and one subspecies. All the samples were collected from Miocene and Pleistocene deposits in Croatia and hold significant biostratigraphical importance.
The paper lists the 29 new species and one new subspecies which types are stored in the CNHM. For each species, we provide data including the original citation, type locality, age, specimen status, museum inventory number, and original holotype number, as well as taxonomic updates, new combinations, and new biostratigraphic data.
{"title":"Collection of ostracod type specimens by Professor Ana Sokač","authors":"Valentina Hajek Tadesse , Katarina Krizmanić","doi":"10.1016/j.revmic.2026.100900","DOIUrl":"10.1016/j.revmic.2026.100900","url":null,"abstract":"<div><div>Here, we present the collection of ostracod type specimens described by Prof. Ana Sokač, housed at the Croatian Natural History Museum in Zagreb (CNHM). Among of the 33 previously described new taxa, 30 are preserved and currently accessible, including 29 species and one subspecies. All the samples were collected from Miocene and Pleistocene deposits in Croatia and hold significant biostratigraphical importance.</div><div>The paper lists the 29 new species and one new subspecies which types are stored in the CNHM. For each species, we provide data including the original citation, type locality, age, specimen status, museum inventory number, and original holotype number, as well as taxonomic updates, new combinations, and new biostratigraphic data.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100900"},"PeriodicalIF":1.0,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146077802","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}
Pub Date : 2026-01-21DOI: 10.1016/j.revmic.2025.100898
C. Giles Miller, Stephen Stukins
The Micropalaeontology Collection at The Natural History Museum, London has an estimated 598,000 units that contain over 2 million individual items. This contribution focuses on the Fossil and Recent Foraminifera, Fossil Ostracoda, Conodonta, Radiolaria, associated samples, residues and microfossil models. A brief history of the staff and collection storage, a brief description of the collection and its current state is presented. Impact is investigated by analysing its visitor record of 9449 visitor days between 1963–2024, a history of over 1579 publications on the collections since 1822 and digital records available on the museum’s data portal. The distribution suggests that impact has been heavily influenced by the level and expertise of research and curatorial staffing, the ability to advertise the collection to users with online collections level descriptions and the availability of external funding to support visits. The collection represents the significant role that micropalaeontology played in the early days of industrial palaeontology and scanning electron microscopy. It also underpins Global but mainly British Stratigraphy as well as supporting interpretation of environments relating to the early human occupation of Britain. University collections represent a long history of training Micropalaeontologists in the UK. Future impact will partly rely on engaging with the micropalaeontological community to help enhance the quality of the collection’s digital data and encourage and recognise use. Activities could include using new CT scanning technologies to illustrate key specimens, providing online collections level data about currently undigitised samples, residues and assemblage slides and using the collection to train the micropalaeontologists of the future.
{"title":"The Micropalaeontology Collection at The Natural History Museum, London – impact, challenges and opportunities","authors":"C. Giles Miller, Stephen Stukins","doi":"10.1016/j.revmic.2025.100898","DOIUrl":"10.1016/j.revmic.2025.100898","url":null,"abstract":"<div><div>The Micropalaeontology Collection at The Natural History Museum, London has an estimated 598,000 units that contain over 2 million individual items. This contribution focuses on the Fossil and Recent Foraminifera, Fossil Ostracoda, Conodonta, Radiolaria, associated samples, residues and microfossil models. A brief history of the staff and collection storage, a brief description of the collection and its current state is presented. Impact is investigated by analysing its visitor record of 9449 visitor days between 1963–2024, a history of over 1579 publications on the collections since 1822 and digital records available on the museum’s data portal. The distribution suggests that impact has been heavily influenced by the level and expertise of research and curatorial staffing, the ability to advertise the collection to users with online collections level descriptions and the availability of external funding to support visits. The collection represents the significant role that micropalaeontology played in the early days of industrial palaeontology and scanning electron microscopy. It also underpins Global but mainly British Stratigraphy as well as supporting interpretation of environments relating to the early human occupation of Britain. University collections represent a long history of training Micropalaeontologists in the UK. Future impact will partly rely on engaging with the micropalaeontological community to help enhance the quality of the collection’s digital data and encourage and recognise use. Activities could include using new CT scanning technologies to illustrate key specimens, providing online collections level data about currently undigitised samples, residues and assemblage slides and using the collection to train the micropalaeontologists of the future.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100898"},"PeriodicalIF":1.0,"publicationDate":"2026-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146022530","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}
Pub Date : 2026-01-19DOI: 10.1016/j.revmic.2025.100895
Jesper Milàn , Kurt S.S. Nielsen , Laura J. Cotton
The museums of East Zealand are responsible for a diverse palaeontological collection covering several important Danish geological sites, including the Danian deep water coral mounds of Faxe, and the UNESCO World Heritage K/Pg boundary site at Stevns Klint. Within these collections are a number of foraminiferal samples, the oldest of which were deposited at the museum in 1963. The collections contain specimens from four localities each belonging to a different formation. They are primarily benthic foraminifera that were deposited in the collections for display and/or example purposes. Although stratigraphic data and lack of documented collection methods hamper the research that can be carried out with the specimens, they give an overview of taxa present, including specimens from a now inaccessible location. We therefore encourage researchers and collectors to use these representative specimens as a basis for future work and expand this regional collection.
{"title":"Late Campanian to mid Danian foraminifers in the collections of Museums of East Zealand, Denmark","authors":"Jesper Milàn , Kurt S.S. Nielsen , Laura J. Cotton","doi":"10.1016/j.revmic.2025.100895","DOIUrl":"10.1016/j.revmic.2025.100895","url":null,"abstract":"<div><div>The museums of East Zealand are responsible for a diverse palaeontological collection covering several important Danish geological sites, including the Danian deep water coral mounds of Faxe, and the UNESCO World Heritage K/Pg boundary site at Stevns Klint. Within these collections are a number of foraminiferal samples, the oldest of which were deposited at the museum in 1963. The collections contain specimens from four localities each belonging to a different formation. They are primarily benthic foraminifera that were deposited in the collections for display and/or example purposes. Although stratigraphic data and lack of documented collection methods hamper the research that can be carried out with the specimens, they give an overview of taxa present, including specimens from a now inaccessible location. We therefore encourage researchers and collectors to use these representative specimens as a basis for future work and expand this regional collection.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100895"},"PeriodicalIF":1.0,"publicationDate":"2026-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146022529","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}
Pub Date : 2026-01-13DOI: 10.1016/j.revmic.2025.100893
Alan Lord, Claudia Franz
The Senckenberg group of research institutes and museums is internationally known for its huge diversity of scientific collections, based on the long, independent histories of these institutes. In the Frankfurt institute several important micropalaeontological collections are held, including the Ostracoda Collection described here. The first catalogued ostracod material dates from 1903, since when the collection has been substantially increased, especially since 1939 thanks to the work of three full-time and one part-time dedicated scientists (Triebel, Malz, Jellinek, Lord), their collaborations, and the visitors that they and the collection attracted to Frankfurt. Other major collections relate to the work of Becker (Devonian), Krömmelbein (Lower Cretaceous, Brazil and West Africa; also Devonian) and Kristan-Tollmann (Triassic worldwide). The collections were moved to new accommodation in 2018, with primary types (currently 1247) stored in two fire-proof safes and other types and background material in nine dedicated modern roller-cabinets.
{"title":"The Ostracoda Collection at the Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt-am-Main, Germany","authors":"Alan Lord, Claudia Franz","doi":"10.1016/j.revmic.2025.100893","DOIUrl":"10.1016/j.revmic.2025.100893","url":null,"abstract":"<div><div>The Senckenberg group of research institutes and museums is internationally known for its huge diversity of scientific collections, based on the long, independent histories of these institutes. In the Frankfurt institute several important micropalaeontological collections are held, including the Ostracoda Collection described here. The first catalogued ostracod material dates from 1903, since when the collection has been substantially increased, especially since 1939 thanks to the work of three full-time and one part-time dedicated scientists (Triebel, Malz, Jellinek, Lord), their collaborations, and the visitors that they and the collection attracted to Frankfurt. Other major collections relate to the work of Becker (Devonian), Krömmelbein (Lower Cretaceous, Brazil and West Africa; also Devonian) and Kristan-Tollmann (Triassic worldwide). The collections were moved to new accommodation in 2018, with primary types (currently 1247) stored in two fire-proof safes and other types and background material in nine dedicated modern roller-cabinets.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100893"},"PeriodicalIF":1.0,"publicationDate":"2026-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145976825","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}
Pub Date : 2026-01-05DOI: 10.1016/j.revmic.2025.100894
Alan Lord, Claudia Franz
The Senckenberg group of research institutes and museums is internationally known for its huge diversity of scientific collections, based on the long, independent histories of these institutes. In the Frankfurt institute several important micropalaeontological collections are held, including the Foraminifera (Protozoa) Collection described here. The oldest catalogued foraminifera material dates from Reuss (1863), and the collection has been substantially increased since the first catalogue (Kinkelin, 1903), and especially since 1936 with major collections of Franke, Bartenstein and Brand (Mesozoic of western Europe especially Germany), Kristan-Tollmann (Triassic worldwide), and the Kahler Fusulinid Collection. There are currently 1332 type specimens of which 357 are primary types. The collections were moved to new accommodation in 2018, with primary types stored in two fire-proof safes and other types and background material in nine dedicated modern roller-cabinets.
{"title":"The Foraminifera Collection at the Senckenberg Research Institute and Natural History Museum Frankfurt, Frankfurt-am-Main, Germany","authors":"Alan Lord, Claudia Franz","doi":"10.1016/j.revmic.2025.100894","DOIUrl":"10.1016/j.revmic.2025.100894","url":null,"abstract":"<div><div>The Senckenberg group of research institutes and museums is internationally known for its huge diversity of scientific collections, based on the long, independent histories of these institutes. In the Frankfurt institute several important micropalaeontological collections are held, including the Foraminifera (Protozoa) Collection described here. The oldest catalogued foraminifera material dates from Reuss (1863), and the collection has been substantially increased since the first catalogue (Kinkelin, 1903), and especially since 1936 with major collections of Franke, Bartenstein and Brand (Mesozoic of western Europe especially Germany), Kristan-Tollmann (Triassic worldwide), and the Kahler Fusulinid Collection. There are currently 1332 type specimens of which 357 are primary types. The collections were moved to new accommodation in 2018, with primary types stored in two fire-proof safes and other types and background material in nine dedicated modern roller-cabinets.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100894"},"PeriodicalIF":1.0,"publicationDate":"2026-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145925714","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}
Pub Date : 2026-01-02DOI: 10.1016/j.revmic.2025.100897
Qianwei Wang, Julia Franke, Peter Frenzel
Tufa deposits are high-resolution archives of Quaternary environmental change, yet the interpretation of their fossil ostracod assemblages is often limited by a lack of well-calibrated modern analogues. This study addresses this gap by conducting a multi-proxy analysis and direct comparison of two tufa-depositing systems in Thuringia, Germany: the modern Pennickental stream and an early Holocene profile from Plinz. By integrating ostracod, mollusc, plant macrofossil, and sedimentological data within the established palynological and isotopic framework for the Plinz site, we reconstruct a three-stage hydrological succession. The record begins with a cool, stable, spring-fed stream during the post-glacial transition (Zone A), transitions to a shallow, standing-water pond during the climatic amelioration of the early Holocene (Zone B), and ends in a cool, groundwater-dominated mire following a late Preboreal/early Boreal cooling event. In contrast, multivariate analysis of the modern Pennickental system reveals a spatially heterogeneous community structured by contemporary hydrochemical and hydrodynamic gradients. This comparative framework allows for the decoupling of two fundamental modes of biodiversity organization: the high temporal beta diversity at Plinz, driven by long-term ecological succession and faunal turnover in response to major climatic forcing, versus the high spatial beta diversity at Pennickental, maintained by niche partitioning in a mature, stable ecosystem. Our findings indicate a “no-analogue problem” comparing the two data sets but provide a robust, multi-proxy framework for critically applying modern spatial data to the interpretation of temporally dynamic records of the past.
{"title":"Ostracod assemblages from a modern and an early Holocene Tufa system in Thuringia, Germany: a comparative paleoecological study","authors":"Qianwei Wang, Julia Franke, Peter Frenzel","doi":"10.1016/j.revmic.2025.100897","DOIUrl":"10.1016/j.revmic.2025.100897","url":null,"abstract":"<div><div>Tufa deposits are high-resolution archives of Quaternary environmental change, yet the interpretation of their fossil ostracod assemblages is often limited by a lack of well-calibrated modern analogues. This study addresses this gap by conducting a multi-proxy analysis and direct comparison of two tufa-depositing systems in Thuringia, Germany: the modern Pennickental stream and an early Holocene profile from Plinz. By integrating ostracod, mollusc, plant macrofossil, and sedimentological data within the established palynological and isotopic framework for the Plinz site, we reconstruct a three-stage hydrological succession. The record begins with a cool, stable, spring-fed stream during the post-glacial transition (Zone A), transitions to a shallow, standing-water pond during the climatic amelioration of the early Holocene (Zone B), and ends in a cool, groundwater-dominated mire following a late Preboreal/early Boreal cooling event. In contrast, multivariate analysis of the modern Pennickental system reveals a spatially heterogeneous community structured by contemporary hydrochemical and hydrodynamic gradients. This comparative framework allows for the decoupling of two fundamental modes of biodiversity organization: the high temporal beta diversity at Plinz, driven by long-term ecological succession and faunal turnover in response to major climatic forcing, versus the high spatial beta diversity at Pennickental, maintained by niche partitioning in a mature, stable ecosystem. Our findings indicate a “no-analogue problem” comparing the two data sets but provide a robust, multi-proxy framework for critically applying modern spatial data to the interpretation of temporally dynamic records of the past.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100897"},"PeriodicalIF":1.0,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884389","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}
Pub Date : 2025-12-29DOI: 10.1016/j.revmic.2025.100889
María Lería , Carles Ferràndez-Cañadell
This work considers the relevance of drawing in foraminiferal micropaleontology and how drawing has helped to understand and explain the complex architecture of foraminiferal tests. We present a brief anthology of those works on foraminifera in which drawing plays a significant role. The objective is to detect milestones in the illustration of foraminifera throughout history and to explore a trajectory in the evolution of the drawing techniques and concepts applied. Drawing is influenced by technological advances, the artist's skills, and the aesthetic influences of the moment. We conclude that drawing, a crucial aspect in this scientific discipline, facilitates the understanding and explanation of complex forms. The literature on foraminifera is replete with small gems of drawing art, sometimes created by artists, but other times by the same micropaleontologists who studied fossil material and described the species. This work highlights some of these drawings to analyse their creation process and to show their great artistic value.
{"title":"Drawing as a tool for representing and explaining complex structures in Foraminifera","authors":"María Lería , Carles Ferràndez-Cañadell","doi":"10.1016/j.revmic.2025.100889","DOIUrl":"10.1016/j.revmic.2025.100889","url":null,"abstract":"<div><div>This work considers the relevance of drawing in foraminiferal micropaleontology and how drawing has helped to understand and explain the complex architecture of foraminiferal tests. We present a brief anthology of those works on foraminifera in which drawing plays a significant role. The objective is to detect milestones in the illustration of foraminifera throughout history and to explore a trajectory in the evolution of the drawing techniques and concepts applied. Drawing is influenced by technological advances, the artist's skills, and the aesthetic influences of the moment. We conclude that drawing, a crucial aspect in this scientific discipline, facilitates the understanding and explanation of complex forms. The literature on foraminifera is replete with small gems of drawing art, sometimes created by artists, but other times by the same micropaleontologists who studied fossil material and described the species. This work highlights some of these drawings to analyse their creation process and to show their great artistic value.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100889"},"PeriodicalIF":1.0,"publicationDate":"2025-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145884390","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}
Pub Date : 2025-12-26DOI: 10.1016/j.revmic.2025.100891
Malcolm B. Hart, Jodie K. Fisher, Christopher W. Smart
Fortescue William Millett (1833‒1915) was one of the leading micropaleontologists of the late nineteenth century. His work concentrated on modern and living foraminifera, some of which were collected from the marine sediments around Cornwall and Devon. He also studied the marine clays of the St Erth Formation, which contain a distinctive and diverse assemblage of foraminifera and ostracods together with some enigmatic, spiny microfossils. The presence of these Pliocene sands and clays, perched on the Paleozoic basement, provides evidence of sea levels significantly higher than the present day. Following Millett’s death in 1915, Edward Heron-Allen purchased his samples, slides and notes, placing them in the collections of the Natural History Museum in London where they remain available for study. The diversity of the microfossil assemblages has been further investigated since the 1970s, and remains of significant interest.
Fortescue William Millett（1833-1915）是19世纪末最重要的微体古生物学家之一。他的工作集中在现代和生活的有孔虫，其中一些是从康沃尔和德文郡周围的海洋沉积物中收集的。他还研究了St Erth组的海相粘土，其中包含有孔虫和介形虫的独特而多样的组合，以及一些神秘的带刺微化石。这些上新世砂和粘土的存在，栖息在古生代的基底上，提供了海平面明显高于现在的证据。1915年，米勒去世后，爱德华·赫伦-艾伦购买了他的样本、幻灯片和笔记，并将它们收藏在伦敦自然历史博物馆，供研究之用。自20世纪70年代以来，对微化石组合的多样性进行了进一步的研究，并且仍然具有重要的兴趣。
{"title":"Fortescue William Millett (1833–1915) and his investigations of the St Erth Formation (Pliocene) in Cornwall","authors":"Malcolm B. Hart, Jodie K. Fisher, Christopher W. Smart","doi":"10.1016/j.revmic.2025.100891","DOIUrl":"10.1016/j.revmic.2025.100891","url":null,"abstract":"<div><div>Fortescue William Millett (1833‒1915) was one of the leading micropaleontologists of the late nineteenth century. His work concentrated on modern and living foraminifera, some of which were collected from the marine sediments around Cornwall and Devon. He also studied the marine clays of the St Erth Formation, which contain a distinctive and diverse assemblage of foraminifera and ostracods together with some enigmatic, spiny microfossils. The presence of these Pliocene sands and clays, perched on the Paleozoic basement, provides evidence of sea levels significantly higher than the present day. Following Millett’s death in 1915, Edward Heron-Allen purchased his samples, slides and notes, placing them in the collections of the Natural History Museum in London where they remain available for study. The diversity of the microfossil assemblages has been further investigated since the 1970s, and remains of significant interest.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100891"},"PeriodicalIF":1.0,"publicationDate":"2025-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840489","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}
Pub Date : 2025-12-23DOI: 10.1016/j.revmic.2025.100890
Juan J. Avendaño-Pazos , Miguel A. Torres-Martínez , Jessica Utrup
Fusulinids are valuable for paleogeographic interpretation and correlation of Carboniferous and Permian biozones worldwide. In Mexico there are several records of this taxonomic group in rocks of the late Paleozoic age from different regions of the country that help to establish the relative ages of different lithostratigraphic units. The Carboniferous fusulinids from Mexico are well represented, particularly in the Pennsylvanian, with the genera Triticites and Beedeina, whose occurrences are concentrated in northern regions. In the Cisuralian, diversity reaches its peak, with the genera Skinnerella and Parafusulina. However, towards the Guadalupian, reports of Mexican fusulinids decrease dramatically, coinciding with tectonic and environmental changes associated with the formation of Pangea. Although the fusulinid record at this time is very diverse, their study in Mexico faces critical problems, including a limited number of thin sections, poorly catalogued specimens, and a lack of specialized collections in micropaleontology. In addition, much of the published material is housed in foreign institutions, making access more challenging. Moreover, considerable records are not housed in any scientific collection, resulting in an evident lack of information on the specimens collected. Such inconsistencies have caused the whereabouts of a large number of studied specimens to be unknown. We believe international cooperation is essential to facilitate the establishment of agreements that allow the sharing of digital duplicates and remote consultation. Thus, fossil heritage management must be conceived as an integral process linking scientific research, legal protection, and public education.
{"title":"Challenges and significance in conserving Mexican fusulinids in scientific collections: the problem of inadequate repositories","authors":"Juan J. Avendaño-Pazos , Miguel A. Torres-Martínez , Jessica Utrup","doi":"10.1016/j.revmic.2025.100890","DOIUrl":"10.1016/j.revmic.2025.100890","url":null,"abstract":"<div><div>Fusulinids are valuable for paleogeographic interpretation and correlation of Carboniferous and Permian biozones worldwide. In Mexico there are several records of this taxonomic group in rocks of the late Paleozoic age from different regions of the country that help to establish the relative ages of different lithostratigraphic units. The Carboniferous fusulinids from Mexico are well represented, particularly in the Pennsylvanian, with the genera <em>Triticites</em> and <em>Beedeina</em>, whose occurrences are concentrated in northern regions. In the Cisuralian, diversity reaches its peak, with the genera <em>Skinnerella</em> and <em>Parafusulina</em>. However, towards the Guadalupian, reports of Mexican fusulinids decrease dramatically, coinciding with tectonic and environmental changes associated with the formation of Pangea. Although the fusulinid record at this time is very diverse, their study in Mexico faces critical problems, including a limited number of thin sections, poorly catalogued specimens, and a lack of specialized collections in micropaleontology. In addition, much of the published material is housed in foreign institutions, making access more challenging. Moreover, considerable records are not housed in any scientific collection, resulting in an evident lack of information on the specimens collected. Such inconsistencies have caused the whereabouts of a large number of studied specimens to be unknown. We believe international cooperation is essential to facilitate the establishment of agreements that allow the sharing of digital duplicates and remote consultation. Thus, fossil heritage management must be conceived as an integral process linking scientific research, legal protection, and public education.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"90 ","pages":"Article 100890"},"PeriodicalIF":1.0,"publicationDate":"2025-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145840490","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}
Pub Date : 2025-12-23DOI: 10.1016/j.revmic.2025.100881
Alice Gimat , Alice Thelliez , Clémence Nalet , Sophie Cersoy , Véronique Rouchon , Marie-Béatrice Forel
The French National Museum of Natural History (MNHN, Paris) hosts Georges Deflandre’s valuable collection, assembled from 1920, and composed of about 13,000 microscope slides. The present condition report of the collection was performed through a detailed inventory of 885 slides and highlighted the mounting techniques used by Deflandre (medium, sealant, dyes). First, the recipes were documented using the available literature. Then, an inventory was undertaken using a spreadsheet with pre-defined entries, designed to facilitate analysis of collected data. Well-documented labels and some chemical analyses were used to fill in the fields. More than 50 combinations of dyes, 19 mounting media and three sealants were used. Regarding the media condition, attention was focused on three major points affecting the observation of the specimens and the long-term conservation of the slides: the color, the mechanical degradation, and the presence of air. Most widespread media in Deflandre’s collection are Canada balsam, coumarone resin and kumadax, all exhibiting yellow or orange tints due to oxidation, but not impacting the condition of specimens. Glycerin jelly was the least stable mounting media with evidence of darkening and shrinking. In general, no relationship between yellowing and mechanical degradation was noticed, nor was a link between the macroscopic sealant degradation and the drying of the mounting medium. Cross-referencing information between the literature and the collection allowed a better understanding of the mounting practices. Additionally, observing these 50–100 year old slides was one of the best ways to assess the durability of mounting media through time.
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