Neogloboquadrina atlantica (Berggren 1972) is one of the most common planktonic foraminiferal species in the Upper Miocene and Pliocene at DSDP/IODP sites in the northern Atlantic. It was originally described from the upper Pliocene at DSDP Site 116 in the Rockall Trough, northeastern Atlantic. In the original description of the species, the depository of the illustrated type specimens was not specified. One of us (WAB) was under the impression that the illustrated type specimens of Neogloboquadrina atlantica had been sent to the Cushman Collection at the Smithsonian Institution. Unfortunately there is no record of the specimen slides having ever arrived at the museum (B. Huber, personal communication, 2020). Fortunately, the second author is still in possession of the shipboard sample residues from DSDP Leg 12, and was able to select a neotype specimen to replace the missing illustrated holotype. The purpose of this note is to designate a neotype specimen for Neogloboquadrina atlantica and to specify a repository for the permanent archive of the neotype and paraneotypes.
Neogloboquadrina atlantica (Berggren, 1972)是北大西洋DSDP/IODP站点中新世和上新世最常见的浮游有孔虫物种之一。它最初是在大西洋东北部Rockall海槽的DSDP Site 116上新世被发现的。在该物种的原始描述中，所示模式标本的存放处没有指定。我们中的一个人(WAB)以为附有插图的大西洋新舌龙的模式标本已经送到史密森学会的库什曼收藏馆了。不幸的是，没有关于标本幻灯片到达博物馆的记录(B. Huber, personal communication, 2020)。幸运的是，第二作者仍然拥有DSDP第12腿的船上样本残留物，并能够选择一个新模式标本来取代缺失的图解全模。本说明的目的是为大西洋新舌龙指定一个新类型标本，并指定一个永久存档新类型和副类型的储存库。
{"title":"A Neotype for Neogloboquadrina atlantica (Berggren 1972)","authors":"M. Kaminski, W. Berggren","doi":"10.47894/mpal.67.1.08","DOIUrl":"https://doi.org/10.47894/mpal.67.1.08","url":null,"abstract":"Neogloboquadrina atlantica (Berggren 1972) is one of the most common planktonic foraminiferal species in the Upper Miocene and Pliocene at DSDP/IODP sites in the northern Atlantic. It was originally described from the upper Pliocene at DSDP Site 116 in the Rockall Trough, northeastern Atlantic. In the original description of the species, the depository of the illustrated type specimens was not specified. One of us (WAB) was under the impression that the illustrated type specimens of Neogloboquadrina atlantica had been sent to the Cushman Collection at the Smithsonian Institution. Unfortunately there is no record of the specimen slides having ever arrived at the museum (B. Huber, personal communication, 2020). Fortunately, the second author is still in possession of the shipboard sample residues from DSDP Leg 12, and was able to select a neotype specimen to replace the missing illustrated holotype. The purpose of this note is to designate a neotype specimen for Neogloboquadrina atlantica and to specify a repository for the permanent archive of the neotype and paraneotypes.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70445254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Hanifa Formation in Saudi Arabia consists of mostly carbonate units of Late Jurassic age and is well exposed along the Tuwaiq Mountain escarpment. Micropaleontological analyses of samples from three outcrops have revealed the presence of benthic foraminifera and ostracods. The study of fossil faunas from the Hawtah Member, has led to the identification of six foraminiferal species: Alveosepta (Redmondellina) powersi, Oolina globosa, Nautiloculina oolithica, Kurnubia palastiniensis, Pseudomarssonella cf. maxima, Lenticulina sp. and two ostracod species: Hutsonia asiatica and Cytherella cf. umbilica. The survey of species covered in this research suggests that they indicate a predominantly euryhaline to polyhaline marine setting, possibly with a slightly brackish influence and deposited in a supratidal environment, suggesting a progressively shallowing environment on the inner shelf with intermittent shoal complexes.
{"title":"Oxfordian Benthic Foraminifera and Ostracods from the Hanifa Formation (Hawtah Member), Central Saudi Arabia","authors":"Saleh S. Aba Alkhayl","doi":"10.47894/mpal.67.6.04","DOIUrl":"https://doi.org/10.47894/mpal.67.6.04","url":null,"abstract":"The Hanifa Formation in Saudi Arabia consists of mostly carbonate units of Late Jurassic age and is well exposed along the Tuwaiq Mountain escarpment. Micropaleontological analyses of samples from three outcrops have revealed the presence of benthic foraminifera and ostracods. The study of fossil faunas from the Hawtah Member, has led to the identification of six foraminiferal species: Alveosepta (Redmondellina) powersi, Oolina globosa, Nautiloculina oolithica, Kurnubia palastiniensis, Pseudomarssonella cf. maxima, Lenticulina sp. and two ostracod species: Hutsonia asiatica and Cytherella cf. umbilica. The survey of species covered in this research suggests that they indicate a predominantly euryhaline to polyhaline marine setting, possibly with a slightly brackish influence and deposited in a supratidal environment, suggesting a progressively shallowing environment on the inner shelf with intermittent shoal complexes.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70445951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Hadi, L. Consorti, M. Vahidinia, M. Parandavar, Marziyeh Zoraghi
The Eocene carbonates of the south Sabzevar region in central Iran hold a rich Alveolina assemblage.Nine species including A. globula, Alveolina sp. 1, Alveolina aff. globula, A. regularis, A. globosa, A. pasticillata, A. laxa, A. pisiformis and A. cf. decipiens are identified through detailed analysis in thin section. The biostratigraphy obtained points to the early Ypresian Shallow Benthic Zones SBZ6 and partly SBZ7, indicating the occurrence of a lower Eocene carbonate system. The Alveolina biostratigraphy is correlated to the calcareous nannofossil biostratigraphy, and is assignable to the middle part of the NP10 Zone and especially with the CNE2 biozones. The evolutionary trends of A. globula and its dispersal through thewestern and central Neo-Tethys Ocean during theYpresian is here considered in relation with the occurrence of Alveolina sp. 1.
{"title":"Ypresian Alveolina and calcareous nannofossils from the south Sabzevar area (Central Iran): biostratigraphic, taxonomic and paleobiogeographic implications","authors":"M. Hadi, L. Consorti, M. Vahidinia, M. Parandavar, Marziyeh Zoraghi","doi":"10.47894/mpal.67.1.04","DOIUrl":"https://doi.org/10.47894/mpal.67.1.04","url":null,"abstract":"The Eocene carbonates of the south Sabzevar region in central Iran hold a rich Alveolina assemblage.Nine species including A. globula, Alveolina sp. 1, Alveolina aff. globula, A. regularis, A. globosa, A. pasticillata, A. laxa, A. pisiformis and A. cf. decipiens are identified through detailed analysis in thin section. The biostratigraphy obtained points to the early Ypresian Shallow Benthic Zones SBZ6 and partly SBZ7, indicating the occurrence of a lower Eocene carbonate system. The Alveolina biostratigraphy is correlated to the calcareous nannofossil biostratigraphy, and is assignable to the middle part of the NP10 Zone and especially with the CNE2 biozones. The evolutionary trends of A. globula and its dispersal through thewestern and central Neo-Tethys Ocean during theYpresian is here considered in relation with the occurrence of Alveolina sp. 1.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70444814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Detailed examinations of middle Pleistocene sediments of ODP Hole 1115B and CoreMD05-2925 in the Solomon Sea, southwest equatorial Pacific, reveal a distinctive new form of the calcareous nannofossil group of gephyrocapsid which has peculiar elongate kite-shaped slits on the distal shields of the coccolith. A new species,Gephyrocapsa kennettii sp. nov., is proposed and described in this study with SEM (scanning electron microscope) images. The coccolith of this new species is elliptical in shape, bearing 2 to 19 kite-shaped slits on the distal shield and a low-angle, raised arch-like bridge. The distal shield has fewer slits than G. protohuxleyi which has slits in between all elements. The bridge is orientated clockwise with am approximate 10 degree angle to the long axis when viewed distally. The average length of the distal shield is 3.26 plus or minus 0.22 (1 theta) mu m (n = 36), and, by definition, this new species belongs to the small Gephyrocapsa group. The chronologic range of this species is short, spanning only from 0.520–0.465 Ma. Its last occurrence datum is almost coevalwith that of Pseudoemiliania lacunosa at the bottom of Marine Isotope Stage 12. Morphologically, G. kennettii sp. nov. is intermediate between G. ericsonii and G. protohuxleyi and considered to be a transitional species originated by hybridization between them.
{"title":"Gephyrocapsa kennettii sp. nov., a new calcareous nannofossil species from the Middle Pleistocene, Solomon Sea, western equatorial Pacific","authors":"C. Chuang, K. Wei, H. Mii, Hui-Ying Suk, L. Lo","doi":"10.47894/mpal.67.1.01","DOIUrl":"https://doi.org/10.47894/mpal.67.1.01","url":null,"abstract":"Detailed examinations of middle Pleistocene sediments of ODP Hole 1115B and CoreMD05-2925 in the Solomon Sea, southwest equatorial Pacific, reveal a distinctive new form of the calcareous nannofossil group of gephyrocapsid which has peculiar elongate kite-shaped slits on the distal shields of the coccolith. A new species,Gephyrocapsa kennettii sp. nov., is proposed and described in this study with SEM (scanning electron microscope) images. The coccolith of this new species is elliptical in shape, bearing 2 to 19 kite-shaped slits on the distal shield and a low-angle, raised arch-like bridge. The distal shield has fewer slits than G. protohuxleyi which has slits in between all elements. The bridge is orientated clockwise with am approximate 10 degree angle to the long axis when viewed distally. The average length of the distal shield is 3.26 plus or minus 0.22 (1 theta) mu m (n = 36), and, by definition, this new species belongs to the small Gephyrocapsa group. The chronologic range of this species is short, spanning only from 0.520–0.465 Ma. Its last occurrence datum is almost coevalwith that of Pseudoemiliania lacunosa at the bottom of Marine Isotope Stage 12. Morphologically, G. kennettii sp. nov. is intermediate between G. ericsonii and G. protohuxleyi and considered to be a transitional species originated by hybridization between them.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70445079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Briguglio, G. Vannucci, Clarissa Bruzzone, M. Piazza
The modern-day decline of coral reefs due to bleaching events has been recognized as one of the major consequences of man-driven climate change. However, also eutrophication has been highlighted as an equally great danger for coral reefs and as such for biodiversity hotspots. In the latest years this phenomenon has moved to the forefront in the scientific community. Fossil reefs play a key role in studying the emergence, development and faunal/floral diversity of reef environments under eutrophic conditions. Their importance as valuable data sources for studying long-term changes of coral reef environments and their resilience cannot be disputed, especially since they may record the complete life cycle of a reef complex. In this study, nine sections nearby the town of Dego (Savona Province, NW Italy) are presented and discussed with regards to their lithostratigraphic and paleontological contents. Due to the extensive amount of data, the original morphology of a fringing reef, consisting of core, flank and fore reef, under strong fluviatile influence could be reconstructed. This study emphasizes the importance of the coralline red algae association in such biocarbonatic build-ups as major constituent and as substrate stabilizers. The sections record the original colonization event of the local basement by the builder community, the emergence of the coral reef and finally the suffocation by the fluviatile sediments. The variation of the red algae association reflects a deepening trend and is possibly correlated to enhanced fluvial input, which tends to deteriorate ecological conditions and functions as a major trigger for initial reef suffocation.
{"title":"Stratigraphic development of a Late Oligocene Reef Complex under strong fluviatile influence in the Tertiary Piedmont Basin (Liguria, NWItaly)","authors":"A. Briguglio, G. Vannucci, Clarissa Bruzzone, M. Piazza","doi":"10.47894/mpal.67.4.01","DOIUrl":"https://doi.org/10.47894/mpal.67.4.01","url":null,"abstract":"The modern-day decline of coral reefs due to bleaching events has been recognized as one of the major consequences of man-driven climate change. However, also eutrophication has been highlighted as an equally great danger for coral reefs and as such for biodiversity hotspots. In the latest years this phenomenon has moved to the forefront in the scientific community. Fossil reefs play a key role in studying the emergence, development and faunal/floral diversity of reef environments under eutrophic conditions. Their importance as valuable data sources for studying long-term changes of coral reef environments and their resilience cannot be disputed, especially since they may record the complete life cycle of a reef complex. In this study, nine sections nearby the town of Dego (Savona Province, NW Italy) are presented and discussed with regards to their lithostratigraphic and paleontological contents. Due to the extensive amount of data, the original morphology of a fringing reef, consisting of core, flank and fore reef, under strong fluviatile influence could be reconstructed. This study emphasizes the importance of the coralline red algae association in such biocarbonatic build-ups as major constituent and as substrate stabilizers. The sections record the original colonization event of the local basement by the builder community, the emergence of the coral reef and finally the suffocation by the fluviatile sediments. The variation of the red algae association reflects a deepening trend and is possibly correlated to enhanced fluvial input, which tends to deteriorate ecological conditions and functions as a major trigger for initial reef suffocation.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70445379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The late middleMiocene microfossil assemblages from the easternmost Pannonian Basin in Romania preserve numerous evolute and deformed specimens of Elphidium, which are assigned to the Recent species E. tongaense (Cushman 1931) originally described from the Pacific. Ourmaterial suggests that the origin of the species is back in the middle Miocene, when amarine connection between the Paratethys and the Indo-Pacific regions probably existed.
{"title":"Elphidium tongaense (Cushman 1931), a quite old Recent foraminifer","authors":"S. Filipescu, Angela Miclea","doi":"10.47894/mpal.67.4.05","DOIUrl":"https://doi.org/10.47894/mpal.67.4.05","url":null,"abstract":"The late middleMiocene microfossil assemblages from the easternmost Pannonian Basin in Romania preserve numerous evolute and deformed specimens of Elphidium, which are assigned to the Recent species E. tongaense (Cushman 1931) originally described from the Pacific. Ourmaterial suggests that the origin of the species is back in the middle Miocene, when amarine connection between the Paratethys and the Indo-Pacific regions probably existed.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70445645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Spongy radiolarians are described from strata of the Roadian Stage (Guadalupian, middle Permian) exposed in a small quarry (Quarry section) in the Guadalupe Mountains,West Texas. These radiolarians are assigned to the orders Entactinaria (conditionally) and Spumellaria. Two new families Hegleriidae and Glomispinidae are proposed. The genus Hegleria Nazarov and Ormiston and its two species, H. mammilla (Sheng andWang) and H. mammifera Nazarov and Ormiston are discussed. Based on an analysis of the distribution and preservation of the illustrated specimens of these two species in the literature, it is proposed that the species H. mammilla should be considered as nomen dubium. The genus Uberinterna Sashida and Tonishi and one species Copicyntra simulens Nazarov and Ormiston are revised. Five new genera, Texasospongites, Allenispongus, Cutoffella, Glomispina, and Orminazarella, and ten new species Texasospongites fazleevi, Allenispongus nobilis, Cutoffella perplexa, Glomispina mirifica, Uberinterna hearstae, U. ancestralis, Provisocyntra vancouveringi, Orminazarella nuda, Paracopicyntra bella, and Copiellintra variabilis are described.
{"title":"Roadian (earliest Guadalupian, middle Permian) radiolarians from the Guadalupe Mountains, West Texas, USA Part II: Spongy radiolarians (?Entactinaria and Spumellaria)","authors":"G. Nestell, M. Nestell","doi":"10.47894/mpal.67.6.01","DOIUrl":"https://doi.org/10.47894/mpal.67.6.01","url":null,"abstract":"Spongy radiolarians are described from strata of the Roadian Stage (Guadalupian, middle Permian) exposed in a small quarry (Quarry section) in the Guadalupe Mountains,West Texas. These radiolarians are assigned to the orders Entactinaria (conditionally) and Spumellaria. Two new families Hegleriidae and Glomispinidae are proposed. The genus Hegleria Nazarov and Ormiston and its two species, H. mammilla (Sheng andWang) and H. mammifera Nazarov and Ormiston are discussed. Based on an analysis of the distribution and preservation of the illustrated specimens of these two species in the literature, it is proposed that the species H. mammilla should be considered as nomen dubium. The genus Uberinterna Sashida and Tonishi and one species Copicyntra simulens Nazarov and Ormiston are revised. Five new genera, Texasospongites, Allenispongus, Cutoffella, Glomispina, and Orminazarella, and ten new species Texasospongites fazleevi, Allenispongus nobilis, Cutoffella perplexa, Glomispina mirifica, Uberinterna hearstae, U. ancestralis, Provisocyntra vancouveringi, Orminazarella nuda, Paracopicyntra bella, and Copiellintra variabilis are described.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70446145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study the foraminifera of the glacial erratic Heiligenhafener Kieselgestein (HKG) consisting of siliceous sandstones are documented for the first time. The glacial erratics in northern Germany were deposited during the Pleistocene. The age of the HKG sandstone is indicated as Eocene from 49.6 Ma to 47.8 Ma. The lower limit is given by the first occurrence of the planktonic foraminifera Pseudohastigerina micra (Cole 1927). The upper limit is derived from previous studies of the Eocene succession of Northern Germany based on benthic foraminiferal faunas. The HKG fauna indicates a boreal, fully marine environment characteristic for a water depth between 50 m and 80 m.
{"title":"Foraminifera in the glacial erratic rock Heiligenhafener Kieselgestein of northern Germany","authors":"M. Hesemann","doi":"10.47894/mpal.66.5.03","DOIUrl":"https://doi.org/10.47894/mpal.66.5.03","url":null,"abstract":"In this study the foraminifera of the glacial erratic Heiligenhafener Kieselgestein (HKG) consisting of siliceous sandstones are documented for the first time. The glacial erratics in northern Germany were deposited during the Pleistocene. The age of the HKG sandstone is indicated as Eocene from 49.6 Ma to 47.8 Ma. The lower limit is given by the first occurrence of the planktonic foraminifera Pseudohastigerina micra (Cole 1927). The upper limit is derived from previous studies of the Eocene succession of Northern Germany based on benthic foraminiferal faunas. The HKG fauna indicates a boreal, fully marine environment characteristic for a water depth between 50 m and 80 m.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49421158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Consorti, F. Schlagintweit, F. Koroglu, K. Rashidi
In the former northern Neotethys margin where Paleocene shallow-water limestone successions crop out (Austria, Turkey and Iran), morphotypes closely resembling Eponides have been recognized. These foraminifers are lamellar-perforated, with a trochospirally arranged set of trapezoidal chambers.We have tested their generic identification through a detailed architectural analysis of thin sections of carbonate rocks in which Eponides-like specimens have abundantly been recovered. This study shows the occurrence of bipartitor, arched septa and a pseudoumbilicus formed by the fusion of ventral ends of chambers. These features allow us to identify the specimens as Eponides, although the specific attribution has not been attempted. The evolutionary pattern displayed by the Late Cretaceous and Cenozoic Eponides and phylogenetically-related allies is briefly discussed.
{"title":"Stratigraphic record of Eponides Montfort 1808 (benthic Foraminifera) through the Paleocene carbonates of the northern Neotethys margin","authors":"L. Consorti, F. Schlagintweit, F. Koroglu, K. Rashidi","doi":"10.47894/mpal.66.5.01","DOIUrl":"https://doi.org/10.47894/mpal.66.5.01","url":null,"abstract":"In the former northern Neotethys margin where Paleocene shallow-water limestone successions crop out (Austria, Turkey and Iran), morphotypes closely resembling Eponides have been recognized. These foraminifers are lamellar-perforated, with a trochospirally arranged set of trapezoidal chambers.We have tested their generic identification through a detailed architectural analysis of thin sections of carbonate rocks in which Eponides-like specimens have abundantly been recovered. This study shows the occurrence of bipartitor, arched septa and a pseudoumbilicus formed by the fusion of ventral ends of chambers. These features allow us to identify the specimens as Eponides, although the specific attribution has not been attempted. The evolutionary pattern displayed by the Late Cretaceous and Cenozoic Eponides and phylogenetically-related allies is briefly discussed.","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43478548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Schlagintweit, Hossein Ghanbarloo, A. Safari, H. Vaziri-Moghaddam
{"title":"Loftusia persica Brady, a Maastrichtian larger benthic foraminifera and not an Eocene Lazarus taxon","authors":"F. Schlagintweit, Hossein Ghanbarloo, A. Safari, H. Vaziri-Moghaddam","doi":"10.47894/mpal.66.5.04","DOIUrl":"https://doi.org/10.47894/mpal.66.5.04","url":null,"abstract":"","PeriodicalId":49816,"journal":{"name":"Micropaleontology","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46921054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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