Pub Date : 2025-08-06DOI: 10.1016/j.revmic.2025.100853
Peter Königshof
Senckenberg – Research Institutes and Natural History Museums, are known for their huge diversity of scientific collections, based on the long, independent history of these institutes. In the Frankfurt Institute, several important micropalaeontological collections are held, including the conodont collection. Due to the long history of research on the Devonian of the Rhenish Massif, the conodont collection has a focus on the Palaeozoic of this region. This collection is of regional and stratigraphic importance, for instance material from the Global Boundary Stratotype Section and Point (GSSP) for the Emsian-Eifelian boundary. Besides large collections of material from the Devonian, the collection houses conodonts from other periods of Earth’s history (e.g., Triassic and Ordovician) and regions (Argentina, Greece, Morocco, Russia, USA).
{"title":"The conodont collection at Senckenberg - Research Institute and Natural History Museum, Frankfurt, Germany","authors":"Peter Königshof","doi":"10.1016/j.revmic.2025.100853","DOIUrl":"10.1016/j.revmic.2025.100853","url":null,"abstract":"<div><div>Senckenberg – Research Institutes and Natural History Museums, are known for their huge diversity of scientific collections, based on the long, independent history of these institutes. In the Frankfurt Institute, several important micropalaeontological collections are held, including the conodont collection. Due to the long history of research on the Devonian of the Rhenish Massif, the conodont collection has a focus on the Palaeozoic of this region. This collection is of regional and stratigraphic importance, for instance material from the Global Boundary Stratotype Section and Point (GSSP) for the Emsian-Eifelian boundary. Besides large collections of material from the Devonian, the collection houses conodonts from other periods of Earth’s history (e.g., Triassic and Ordovician) and regions (Argentina, Greece, Morocco, Russia, USA).</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"89 ","pages":"Article 100853"},"PeriodicalIF":1.0,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144780434","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 : 2025-07-03DOI: 10.1016/j.revmic.2025.100852
Ahmed M. BadrElDin , Abd El-Monsef A. El-Badry , Orabi H. Orabi
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 >> Pb > Co > Ni > Zn > 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 Ammonia tepida (Cushman, 1926) and Cyprideis torosa 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.
{"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 , Abd El-Monsef A. El-Badry , 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 >> Pb > Co > Ni > Zn > 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":"2025-07-03","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}
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 Icriodus alternatus alternatus, I. alternatus helmsi, I. expansus, I. excavatus, Polygnathus webbi, P. aequalis, P. politus and P. brevilaminus. This assemblage suggests a Late Frasnian age and correlates with the rhenana conodont Zone sensu lato, thereby providing a chronostratigraphic constraint for the local brachiopod Zone Ripidiorhynchus gnishikensis–Angustisulcispirifer arakelyani. Conodonts obtained by some limestone intercalations within the overlying siliciclastic interval include I. iowaensis iowaensis and P. webbi, which constrain its age to the linguiformis Zone.
{"title":"Upper Frasnian conodont biostratigraphy of the Noravank section (Central Armenia)","authors":"Meline Tsatryan , Vahram Serobyan , Arayik Grigoryan , Nune Avagyan , Taniel Danelian , 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":"2025-05-19","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}
Pub Date : 2025-04-17DOI: 10.1016/j.revmic.2025.100840
Marie-Béatrice Forel
Ostracod assemblages from three sites exposing the Cassian Formation (Carnian) in the Dolomites are here described and discussed: Seelandalpe, Milières and Pralongia. They are the opportunity to update their taxonomy and increase the knowledge of their biodiversity for the first time since the 1970s. Forty-three species distributed into 27 genera and 11 families are reported, numerous species being kept in open nomenclature because of rarity. Hiatobairdia peggy Forel sp. nov. is newly described and Hungarella limbata, the second species described from the Cassian Formation and originally attributed to the genus Cytherella, is re-attributed to Aneisohealdia based on the presence of an anterior spine. A neotype is designated for Aneisohealdia limbata, which type specimens were lost before the description of the species. Following the present analysis, 33 formal ostracod species are now known from the Cassian Formation. The Milières locality here provides the first record of Cypridinidae for the Cassian Formation, pointing to complex predator-prey relationships.
{"title":"Ostracods from the Cassian formation (Carnian, Late Triassic)","authors":"Marie-Béatrice Forel","doi":"10.1016/j.revmic.2025.100840","DOIUrl":"10.1016/j.revmic.2025.100840","url":null,"abstract":"<div><div>Ostracod assemblages from three sites exposing the Cassian Formation (Carnian) in the Dolomites are here described and discussed: Seelandalpe, Milières and Pralongia. They are the opportunity to update their taxonomy and increase the knowledge of their biodiversity for the first time since the 1970s. Forty-three species distributed into 27 genera and 11 families are reported, numerous species being kept in open nomenclature because of rarity. <em>Hiatobairdia peggy</em> Forel sp. nov. is newly described and <em>Hungarella limbata</em>, the second species described from the Cassian Formation and originally attributed to the genus <em>Cytherella</em>, is re-attributed to <em>Aneisohealdia</em> based on the presence of an anterior spine. A neotype is designated for <em>Aneisohealdia limbata</em>, which type specimens were lost before the description of the species. Following the present analysis, 33 formal ostracod species are now known from the Cassian Formation. The Milières locality here provides the first record of Cypridinidae for the Cassian Formation, pointing to complex predator-prey relationships.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"87 ","pages":"Article 100840"},"PeriodicalIF":0.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124330","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 : 2025-04-14DOI: 10.1016/j.revmic.2025.100844
Asmaa Korin , Sherif Allam , John D. Humphrey , Abduljamiu O. Amao , Korhan Ayranci , Mohammed I. Najjar , Ahmed A. Bahameem , Iyad S. Zalmout , Abdullah M. Memesh , Michael A. Kaminski
This research provides a first description and biostratigraphic analysis of Hantkenina species in the middle to upper Eocene Rashrashiyah Formation of the Sirhan-Turayf Basin, northwest Saudi Arabia. Seven species—Hantkenina dumblei, H. australis, H. longispina, H. compressa, H. primitiva, H. alabamensis, and H. nanggulanensis—are identified within planktonic foraminiferal biozones E13 to E14, aligning with the NP17 to NP18 calcareous nannoplankton zones. The co-occurrence of H. dumblei, H. australis, and H. longispina 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 H. compressa, H. primitiva, and H. alabamensis. 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 Hantkenina as a key biostratigraphic marker in global paleoecology reconstructions, strengthening worldwide Eocene correlations.
{"title":"The genus Hantkenina in Saudi Arabia: Implications for biostratigraphy and paleoecology across the Bartonian–Priabonian transition","authors":"Asmaa Korin , Sherif Allam , John D. Humphrey , Abduljamiu O. Amao , Korhan Ayranci , Mohammed I. Najjar , Ahmed A. Bahameem , Iyad S. Zalmout , Abdullah M. Memesh , 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 (δ<sup>18</sup>O 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":"2025-04-14","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}
Pub Date : 2025-04-11DOI: 10.1016/j.revmic.2025.100843
Pauline Sabina Kavali , Ayushi Mishra
The Talchir Formation of the Gondwana Supergroup in India is a geological unit of glaciomarine/ glaciofluvial/glaciolacustrine origin that documents the glaciation that affected the supercontinent of Gondwana during the late Paleozoic. Previous spore-pollen biostratigraphy constrained the depositional age of the entire Talchir Formation to the Asselian. In this paper we present a palynological assemblage obtained from the Talchir Formation in the bore hole MAWP 114, drilled in the late Paleozoic Wardha Basin, central India. It comprises of a very rich assemblage of 79 species, of which 38 species are spores, 34 species pollen and seven species of algae. Based on the identification of radiometrically and faunally constrained biostratigraphically key species such as Vittatina spp., Converrucosisporites confluens, Pseudoreticulatispora pseudoreticulata, among others, an age not older than Gzhelian is inferred for the interval studied. The inferred age allows us to relate the Talchir deposits with the last episode of the Late Paleozoic Ice Age (LPIA). The palynological assemblage of the Talchir Formation from the present study favours its correlation with the radiometrically updated palynostratigraphic schemes established across Gondwana, on the basis of which it is constrained to the Gzhelian-early Sakmarian, encompassing the Carboniferous-Permian boundary. In India the position of the Permo-Carboniferous boundary is elusive due to lack of volcanic tuffs containing datable zircons; however, based on spore-pollen and zircon dates from Namibia this boundary is placed within the P. confluens Zone. Several taxa viz., Cristatisporites lestai, C. inconstans, C. microvacuolatus, C. crassilabratus, C. menendezii, C. stellatus, Lundbladispora braziliensis, L.riobonitensis, L.areolata, L. obsoleta, Brevitriletes leptocaina and, B. parmatus were documented for the first time in Indian Talchir sediments.
{"title":"A latest Carboniferous-earliest Permian palynoflora from the glacigenic Talchir Formation, Wardha Basin, central India and their biostratigraphic implications","authors":"Pauline Sabina Kavali , Ayushi Mishra","doi":"10.1016/j.revmic.2025.100843","DOIUrl":"10.1016/j.revmic.2025.100843","url":null,"abstract":"<div><div>The Talchir Formation of the Gondwana Supergroup in India is a geological unit of glaciomarine/ glaciofluvial/glaciolacustrine origin that documents the glaciation that affected the supercontinent of Gondwana during the late Paleozoic. Previous spore-pollen biostratigraphy constrained the depositional age of the entire Talchir Formation to the Asselian. In this paper we present a palynological assemblage obtained from the Talchir Formation in the bore hole MAWP 114, drilled in the late Paleozoic Wardha Basin, central India. It comprises of a very rich assemblage of 79 species, of which 38 species are spores, 34 species pollen and seven species of algae. Based on the identification of radiometrically and faunally constrained biostratigraphically key species such as <em>Vittatina</em> spp., <em>Converrucosisporites confluens, Pseudoreticulatispora pseudoreticulata</em>, among others, an age not older than Gzhelian is inferred for the interval studied. The inferred age allows us to relate the Talchir deposits with the last episode of the Late Paleozoic Ice Age (LPIA). The palynological assemblage of the Talchir Formation from the present study favours its correlation with the radiometrically updated palynostratigraphic schemes established across Gondwana, on the basis of which it is constrained to the Gzhelian-early Sakmarian, encompassing the Carboniferous-Permian boundary. In India the position of the Permo-Carboniferous boundary is elusive due to lack of volcanic tuffs containing datable zircons; however, based on spore-pollen and zircon dates from Namibia this boundary is placed within the <em>P. confluens</em> Zone. Several taxa viz., <em>Cristatisporites lestai, C. inconstans, C. microvacuolatus, C. crassilabratus</em>, C. <em>menendezii, C. stellatus, Lundbladispora braziliensis, L.riobonitensis, L.areolata, L. obsoleta, Brevitriletes leptocaina</em> and<em>, B. parmatus</em> were documented for the first time in Indian Talchir sediments.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"87 ","pages":"Article 100843"},"PeriodicalIF":0.7,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124332","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}
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 Budurovignathus hungaricus 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 (Archaeocenosphaera, Paurinella, Triassospongosphaera, Spongopallium), and monocyrtid Nassellaria (mostly Hozmadia). Among Pentactinocarpidae, Lobactinocapsa ellipsoconcha 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.
{"title":"Paleoecology of Early Ladinian low-diversity radiolarian fauna from Mt. Svilaja (External Dinarides, Croatia)","authors":"Špela Goričan , Tea Kolar-Jurkovšek , Dunja Aljinović , Tamara Troskot-Čorbić , 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":"2025-04-03","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}
Pub Date : 2025-03-26DOI: 10.1016/j.revmic.2025.100842
Špela Goričan , Luis O'Dogherty , Giuseppe Cortese
{"title":"Editorial preface to the INTERRAD XVI Virtual Special Issue on Mesozoic and Cenozoic Radiolaria","authors":"Špela Goričan , Luis O'Dogherty , Giuseppe Cortese","doi":"10.1016/j.revmic.2025.100842","DOIUrl":"10.1016/j.revmic.2025.100842","url":null,"abstract":"","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"87 ","pages":"Article 100842"},"PeriodicalIF":0.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124329","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}
Pattersoncypris 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 Pattersoncypris 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 Pattersoncypris 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 Pattersoncypris labiata n. sp. was proposed. Data analysis indicated that Pattersoncypris is an euryhaline genus that originated in the Gondwana continent, in the region that became the African Continent, from an ancestor of the genus Hourcqia, 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.
patterson塞浦路斯是一个介形虫属化石，在巴西、阿根廷、利比里亚、刚果、加蓬、安哥拉、乍得和美国的白垩纪非海洋、过渡和海洋沉积物中发现了14种。由于它是与南大西洋开放有关的巴西和非洲早白垩世沉积盆地中数量丰富且种类多样的属，因此在分类上经常发生误认，给生物地层学、古动物地理和古环境解释带来了问题。面对这一问题，本研究的目的是研究pattersoncyrus物种的形态变化，确定最可靠的诊断特征，从而可靠地识别物种，并提供有助于理解该属的进化史及其古动物地理分布的数据。从形态学和分类学两个方面对该属进行了综述。对10个种进行了分类修正，并提出了一个新种——唇形蛇（pattersoncyris labiata n. sp）。数据分析表明，patterson塞浦路斯属是一种泛盐属，起源于冈瓦纳大陆，在后来成为非洲大陆的地区，来自可能在阿普tian早期的Hourcqia属的祖先。该属的适应辐射在Aptian时期达到顶峰，多样性中心位于巴西东北部。从阿尔及利亚开始，物种的丰富度下降，在非洲记录到的物种越来越少。Cenomanian早期-中期出现了一个没有物种记录的间歇期。在美国的塞诺曼尼亚晚期记录了一个物种，到这个时代结束时，这个属已经灭绝了。
{"title":"What is Pattersoncypris Bate (Ostracoda: Cyprididae)? A review of the genus and its species","authors":"Renata Juliana Arruda Maia , Débora Almeida-Lima , Juliana Guzmán , 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":"2025-03-05","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}
Pub Date : 2025-01-20DOI: 10.1016/j.revmic.2024.100830
Francesco Sciuto , Angela Baldanza , Agatino Reitano
In Costa Bausa, along the left side of the Torrente Mazzarino (NE Buccheri, SE Sicily), marine sands referred to the Pliocene by many authors for their stratigraphic position and the molluscs fauna they contain, crop out unconformably above the Miocene carbonate succession. In the present study, the taxonomy of ostracods of these sands is performed and new species are described, the foraminifera are analyzed for the first time and a taxonomic list of molluscs is also provided. The ostracod fauna is composed of specimens mostly belonging to shallow marine genera, such as Aurila, Neonesidea, Bosquetina, Callistocythere, Carynocythereis, Cistacythereis, Cytherelloidea, Cytheretta, Costa, Graptocythere, Grinioneis, Loxoconcha, Mutilus, Caudites, Pontocythere, Semicytherura, Tenedocythere, Urocythereis, Verrucocythereis and Xestoleberis. Among them, eight species are newly described: Perissocytheridea (Kroemmelbeinella) hiblaea n. sp., Aurila costabausaensis n. sp., Aurila daphnidis n. sp., Aurila mazzarinoensis n. sp., Aurila sanctiandreae n. sp., Tenedocythere forticostata n. sp., Cytheretta buccheriensis n. sp., Verrucocythereis verrucomurata n. sp.
Among planktonic foraminifera, only few specimens of Orbulina universa, O. suturalis, Trilobatus trilobus and T. sacculifer occur. The assemblage of benthic foraminifera is characterized by Amphistegina lobifera, A. lessonii, Elphidium crispum, E. macellum, Ammonia beccarii, A. parkinsoniana, Lobatula lobatula, Cancris auricula, Patellina corrugata, Quinqueloculina seminulum, Massilina oblonga, Oolina exagona and O. lineata.
The molluscs association found has helped to relate the studied levels to the Late Pliocene.
在Costa Bausa，沿着Torrente Mazzarino的左侧（布切里东北部，西西里岛东南部），海相砂被许多作者称为上新世，因为它们的地层位置和它们所包含的软体动物动物群，在中新世碳酸盐序列之上不整合地出现。本文对这些沙洲的介形类进行了分类，发现了新种，首次对有孔虫类进行了分析，并编制了软体动物分类表。甲壳类动物区系主要由浅海属的Aurila、Neonesidea、Bosquetina、Callistocythere、Carynocythereis、Cistacythereis、Cytherelloidea、Cytheretta、Costa、Graptocythere、Grinioneis、Loxoconcha、Mutilus、Caudites、Pontocythere、半ytherura、Tenedocythere、Urocythereis、Verrucocythereis和Xestoleberis等标本组成。其中，新发现的有孔虫有8种，分别为：大耳虫（Kroemmelbeinella） hiblaea n. sp、海耳虫（Aurila costabausaensis n. sp）、水耳虫（Aurila daphnidis n. sp）、mazzarinoensis n. sp、sanctiandreae n. sp、tendocythere forticostata n. sp、Cytheretta bucheriensis n. sp、Verrucocythereis verrucomurata n. sp。在浮游有孔虫中，只有Orbulina universa、O. suturalis、Trilobatus trilobus和T. sacullifer出现过。底栖有孔虫的群落特征为：圆叶Amphistegina loifera、A. lessonii、Elphidium crispum、E. macellum、amcarii、A. parkinsoniana、Lobatula Lobatula、canris auricula、Patellina walgata、Quinqueloculina semulum、masilina oblonga、Oolina ona和O. lineata。发现的软体动物关联有助于将所研究的水平与上新世晚期联系起来。
{"title":"Ostracods taxonomic study and other faunistic record from Costa Bausa (Buccheri, Southeastern Sicily)","authors":"Francesco Sciuto , Angela Baldanza , Agatino Reitano","doi":"10.1016/j.revmic.2024.100830","DOIUrl":"10.1016/j.revmic.2024.100830","url":null,"abstract":"<div><div>In Costa Bausa, along the left side of the Torrente Mazzarino (NE Buccheri, SE Sicily), marine sands referred to the Pliocene by many authors for their stratigraphic position and the molluscs fauna they contain, crop out unconformably above the Miocene carbonate succession. In the present study, the taxonomy of ostracods of these sands is performed and new species are described, the foraminifera are analyzed for the first time and a taxonomic list of molluscs is also provided. The ostracod fauna is composed of specimens mostly belonging to shallow marine genera, such as <em>Aurila, Neonesidea, Bosquetina, Callistocythere, Carynocythereis, Cistacythereis, Cytherelloidea, Cytheretta, Costa, Graptocythere, Grinioneis, Loxoconcha, Mutilus, Caudites, Pontocythere, Semicytherura, Tenedocythere, Urocythereis, Verrucocythereis</em> and <em>Xestoleberis</em>. Among them, eight species are newly described: <em>Perissocytheridea</em> (<em>Kroemmelbeinella</em>) <em>hiblaea</em> n. sp., <em>Aurila costabausaensis</em> n. sp., <em>Aurila daphnidis</em> n. sp., <em>Aurila mazzarinoensis</em> n. sp., <em>Aurila sanctiandreae</em> n. sp., <em>Tenedocythere forticostata</em> n. sp., <em>Cytheretta buccheriensis</em> n. sp., <em>Verrucocythereis verrucomurata</em> n. sp.</div><div>Among planktonic foraminifera, only few specimens of <em>Orbulina universa, O. suturalis, Trilobatus trilobus</em> and <em>T. sacculifer</em> occur. The assemblage of benthic foraminifera is characterized by <em>Amphistegina lobifera, A. lessonii, Elphidium crispum, E. macellum, Ammonia beccarii, A. parkinsoniana, Lobatula lobatula, Cancris auricula, Patellina corrugata, Quinqueloculina seminulum, Massilina oblonga, Oolina exagona</em> and <em>O. lineata</em>.</div><div>The molluscs association found has helped to relate the studied levels to the Late Pliocene.</div></div>","PeriodicalId":45442,"journal":{"name":"REVUE DE MICROPALEONTOLOGIE","volume":"86 ","pages":"Article 100830"},"PeriodicalIF":0.7,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143571485","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}
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