Eleven late Bashkirian ammonoid taxa (Anthracoceratites sp., Cymoceras sp., Melvilloceras rotaii (Librovitch in Popov, 1979), Gastrioceras angustum Patteisky, 1964, G. lupinum Popov, 1979, G. kutejnikovense Popov, 1979, ?Agastrioceras sp., Bisatoceras sp., ?Owenoceras sp., Branneroceras sp. A, and Branneroceras sp. B), are described from the Mospyne Formation of the Donets Basin, eastern Ukraine. Representatives of the genera Cymoceras, Agastrioceras, Bisatoceras are first recorded from the Carboniferous of the Donets Basin. Early Westphalian (G2 ammonoid zone, Langsettian) ammonoids Gastrioceras listeri, G. angustum and Branneroceras spp. indicate the attribution of the Mospyne Formation to the Gastrioceras-Branneroceras Genozone.
在乌克兰东部顿涅茨盆地Mospyne组发现了11个巴bashkiian晚期菊科动物分类群(Anthracoceratites sp.， Cymoceras sp.， Melvilloceras rotaii (Librovitch in Popov, 1979)， Gastrioceras angustum Patteisky, 1964, G. lupinum Popov, 1979, G. kutejnikovense Popov, 1979, Agastrioceras sp.， Bisatoceras sp.， Owenoceras sp.， Branneroceras sp. A, Branneroceras sp. B)。Cymoceras、Agastrioceras、Bisatoceras属的代表最早记录于顿涅茨盆地石炭纪。早期威斯特伐利亚(G2氨类带，Langsettian)氨类Gastrioceras listeri, G. angustum和Branneroceras sp .表明Mospyne组属于Gastrioceras-Branneroceras Genozone。
{"title":"Late Bashkirian ammonoids from the Mospyne Formation of the Donets Basin, Ukraine","authors":"V. Dernov","doi":"10.37520/fi.2022.021","DOIUrl":"https://doi.org/10.37520/fi.2022.021","url":null,"abstract":"Eleven late Bashkirian ammonoid taxa (Anthracoceratites sp., Cymoceras sp., Melvilloceras rotaii (Librovitch in Popov, 1979), Gastrioceras angustum Patteisky, 1964, G. lupinum Popov, 1979, G. kutejnikovense Popov, 1979, ?Agastrioceras sp., Bisatoceras sp., ?Owenoceras sp., Branneroceras sp. A, and Branneroceras sp. B), are described from the Mospyne Formation of the Donets Basin, eastern Ukraine. Representatives of the genera Cymoceras, Agastrioceras, Bisatoceras are first recorded from the Carboniferous of the Donets Basin. Early Westphalian (G2 ammonoid zone, Langsettian) ammonoids Gastrioceras listeri, G. angustum and Branneroceras spp. indicate the attribution of the Mospyne Formation to the Gastrioceras-Branneroceras Genozone.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69922603","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}
E. M. Friis, P. Crane, K. Pedersen, M. Mendes, J. Kvaček
Angiosperm mesofossils are described from the Lower Cretaceous Almargem Formation exposed near the village of Catefica, Portugal, and are thought to be of Aptian-early Albian age. The mesofossil assemblage from Catefica is diverse and, in addition to the angiosperms described here, also contains a rich assemblage of non-angiosperm fossils, including leafy axes of bryophytes and lycopsids, lycopsid and salvinialean megaspores, and sporangia, sori and leaf fragments of ferns. There are also twigs, cones, cone scales, seeds and sporangia of several kinds of conifers. Other seed plants include 11 species of chlamydospermous seeds and vegetative axes related to the BEG group (Bennettiales-Erdtmanithecales-Gnetales). In terms of the number of plant fragments identified, angiosperms are most abundant in the Catefica assemblage and account for more than half of all specimens. Angiosperms also dominate in number of species, but because the non-angiosperm fossils have not been studied in detail the total number of species in the flora is not yet established. Sixty-seven species of angiosperms are recognized. Angiosperm diversity is mainly at the level of non-eudicots, including ANA-grade angiosperms, Chloranthaceae and magnoliids. Remains of chloranthoid angiosperms are especially common, both in the number of specimens and in number of species recognized. About 40 % of the specimens, and more than 25 % of the species are chloranthoids. Remains of magnoliid angiosperms (Magnoliales, Laurales, Canellales, Piperales) are also prominent among the angiosperms. Eudicots are subordinate: only 3–4 % of all angiosperm specimens can be assigned confidently to eudicot angiosperms. Five new genera and six new species of angiosperms are established (Canrightia foveolata sp. nov., Elasmostemon paisii gen. et sp. nov., Endressistemon cateficensis gen. et sp. nov., Ibericarpus cuneiformis gen. et sp. nov., Proencistemon portugallicus gen. et sp. nov., Valvidistemon globiferus gen. et sp. nov.). Several other new taxa are also described, but not formally named.
在葡萄牙Catefica村附近发现的下白垩纪Almargem组的被子植物中化石被认为是aptian -早期Albian时代的。Catefica的中化石组合是多样的，除了这里描述的被子植物外，还包含丰富的非被子植物化石组合，包括苔藓植物和石松类的叶轴，石松类和大孢子，以及蕨类植物的孢子囊、sori和叶碎片。还有几种针叶树的小枝、球果、球果鳞片、种子和孢子囊。其他种子植物包括11种与BEG类群(bennettiales - erdtmanicales - gnetales)相关的衣胚种子和营养轴。从已鉴定的植物片段数量来看，被子植物在Catefica组合中最为丰富，占所有标本的一半以上。被子植物在物种数量上也占主导地位，但由于非被子植物化石尚未得到详细的研究，因此植物区系的物种总数尚未确定。被子植物共有67种。被子植物的多样性主要在非菊科水平，包括ana级被子植物、绿兰科和木兰科。无论是在标本的数量上，还是在已知物种的数量上，绿衣被子植物的遗迹都特别普遍。约40%的标本和超过25%的物种是绿桫椤。木兰属被子植物(Magnoliales, Laurales, Canellales, Piperales)的遗迹在被子植物中也很突出。单株被子植物是从属的:只有3 - 4%的被子植物标本可以确定地归属于单株被子植物。建立被子植物5个新属、6个新种(Canrightia foveolata sp. 11、Elasmostemon paisii gen. et sp. 11、enressistemon cateficensis gen. et sp. 11、Ibericarpus cuneiformis gen. et sp. 11、Proencistemon portugallicus gen. 11、Valvidistemon globiferus gen. 11)。还描述了其他几个新分类群，但没有正式命名。
{"title":"The Early Cretaceous mesofossil flora of Catefica, Portugal: angiosperms","authors":"E. M. Friis, P. Crane, K. Pedersen, M. Mendes, J. Kvaček","doi":"10.37520/fi.2022.016","DOIUrl":"https://doi.org/10.37520/fi.2022.016","url":null,"abstract":"Angiosperm mesofossils are described from the Lower Cretaceous Almargem Formation exposed near the village of Catefica, Portugal, and are thought to be of Aptian-early Albian age. The mesofossil assemblage from Catefica is diverse and, in addition to the angiosperms described here, also contains a rich assemblage of non-angiosperm fossils, including leafy axes of bryophytes and lycopsids, lycopsid and salvinialean megaspores, and sporangia, sori and leaf fragments of ferns. There are also twigs, cones, cone scales, seeds and sporangia of several kinds of conifers. Other seed plants include 11 species of chlamydospermous seeds and vegetative axes related to the BEG group (Bennettiales-Erdtmanithecales-Gnetales). In terms of the number of plant fragments identified, angiosperms are most abundant in the Catefica assemblage and account for more than half of all specimens. Angiosperms also dominate in number of species, but because the non-angiosperm fossils have not been studied in detail the total number of species in the flora is not yet established. Sixty-seven species of angiosperms are recognized. Angiosperm diversity is mainly at the level of non-eudicots, including ANA-grade angiosperms, Chloranthaceae and magnoliids. Remains of chloranthoid angiosperms are especially common, both in the number of specimens and in number of species recognized. About 40 % of the specimens, and more than 25 % of the species are chloranthoids. Remains of magnoliid angiosperms (Magnoliales, Laurales, Canellales, Piperales) are also prominent among the angiosperms. Eudicots are subordinate: only 3–4 % of all angiosperm specimens can be assigned confidently to eudicot angiosperms. Five new genera and six new species of angiosperms are established (Canrightia foveolata sp. nov., Elasmostemon paisii gen. et sp. nov., Endressistemon cateficensis gen. et sp. nov., Ibericarpus cuneiformis gen. et sp. nov., Proencistemon portugallicus gen. et sp. nov., Valvidistemon globiferus gen. et sp. nov.). Several other new taxa are also described, but not formally named.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69922871","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}
Actinopterygians from the Permian sediments of the Czech part of Intra-Sudetic Basin, occurring in the Ruprechtice and Otovice Limestone horizons (Broumov Formation), are revised and redescribed based on both old material and newly discovered specimens. A new diagnosis and reconstruction of Paramblypterus vratislaviensis (Agassiz, 1833), the most numerous actinopterygian of the Ruprechtice Limestone Horizon, and the rare Paramblypterus zeidleri (Fritsch, 1895) are published. First actinopterygians from the Otovice Limestone Horizon were described. Most of the specimens from the Otovice Limestone are referred here to Paramblypterus cf. rohani and Paramblypterus sp. Representatives of Aeduellidae have also recently been discovered in the Otovice Limestone. Osteological fragments belonging to a new taxon exhibit the diagnostic features of the genera Aeduella and Bourbonnela. The reasons for the significantly different faunistic content in the stratigraphically close Ruprechtice Limestone Horizon and Otovice Limestone Horizon are discussed.
{"title":"Actinopterygians of the Broumov Formation (Permian) in the Czech part of the Intra-Sudetic Basin (the Czech Republic)","authors":"S. Štamberg","doi":"10.37520/fi.2021.008","DOIUrl":"https://doi.org/10.37520/fi.2021.008","url":null,"abstract":"Actinopterygians from the Permian sediments of the Czech part of Intra-Sudetic Basin, occurring in the Ruprechtice and Otovice Limestone horizons (Broumov Formation), are revised and redescribed based on both old material and newly discovered specimens. A new diagnosis and reconstruction of Paramblypterus vratislaviensis (Agassiz, 1833), the most numerous actinopterygian of the Ruprechtice Limestone Horizon, and the rare Paramblypterus zeidleri (Fritsch, 1895) are published. First actinopterygians from the Otovice Limestone Horizon were described. Most of the specimens from the Otovice Limestone are referred here to Paramblypterus cf. rohani and Paramblypterus sp. Representatives of Aeduellidae have also recently been discovered in the Otovice Limestone. Osteological fragments belonging to a new taxon exhibit the diagnostic features of the genera Aeduella and Bourbonnela. The reasons for the significantly different faunistic content in the stratigraphically close Ruprechtice Limestone Horizon and Otovice Limestone Horizon are discussed.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69921114","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}
L. Golovneva, E. Bugdaeva, E. Volynets, Yuewu Sun, A. Zolina
The Partizansk and Razdolnaya coal basins of Primorye, Far East of Russia, contain diverse early angiosperm fossils (pollen, leaves, and fruits). In this paper, we revise the previous data on early angiosperms of this region and summarize the results of our latest research. Age of the plant-bearing deposits was clarified using isotopic U-Th-Pb LA-ICP-MS and U-Pb ID-TIMS methods. Age of the upper part of the Lipovtsy Formation is 118 ± 1.4 Ma, which corresponds to the late Aptian. The early Albian age (109 ± 1 Ma) is assigned to the upper part of the Frentsevka Formation. The diversification of angiosperms in the Early Cretaceous of Primorye region and their systematic affinity are analyzed. Early representatives of Laurales, Ranunculales, Platanaceae, and probable Cercidiphyllaceae are revealed. New combination Pandanites ahnertii (Krysht.) Golovn., comb. nov. is created, and new species Araliaephyllum vittenburgii Golovn. et Volynets, sp. nov. is described. Reconstructions of herbaceous angiosperms from autochthonous locality Bolshoy Kuvshin are proposed.
{"title":"Angiosperm diversification in the Early Cretaceous of Primorye, Far East of Russia","authors":"L. Golovneva, E. Bugdaeva, E. Volynets, Yuewu Sun, A. Zolina","doi":"10.37520/fi.2021.017","DOIUrl":"https://doi.org/10.37520/fi.2021.017","url":null,"abstract":"The Partizansk and Razdolnaya coal basins of Primorye, Far East of Russia, contain diverse early angiosperm fossils (pollen, leaves, and fruits). In this paper, we revise the previous data on early angiosperms of this region and summarize the results of our latest research. Age of the plant-bearing deposits was clarified using isotopic U-Th-Pb LA-ICP-MS and U-Pb ID-TIMS methods. Age of the upper part of the Lipovtsy Formation is 118 ± 1.4 Ma, which corresponds to the late Aptian. The early Albian age (109 ± 1 Ma) is assigned to the upper part of the Frentsevka Formation. The diversification of angiosperms in the Early Cretaceous of Primorye region and their systematic affinity are analyzed. Early representatives of Laurales, Ranunculales, Platanaceae, and probable Cercidiphyllaceae are revealed. New combination Pandanites ahnertii (Krysht.) Golovn., comb. nov. is created, and new species Araliaephyllum vittenburgii Golovn. et Volynets, sp. nov. is described. Reconstructions of herbaceous angiosperms from autochthonous locality Bolshoy Kuvshin are proposed.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69921320","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}
B. Muljana, U. Mardiana, Adi Hardiyono, N. Sulaksana, D. J. Setiadi, Lia Jurnaliah, Nurdrajat
This study focuses on the analysis of sedimentary facies and ichnogenus variations to determine the palaeogeographic setting of turbidite deposits that are clearly exposed in the surroundings of Majalengka area, West Java, Indonesia. Lithofacies variation in turbidite deposits, identified from detailed stratigraphic sections, were visually presented as a composite log and indicated a thickening and coarsening pattern due to a regressive event. Trace fossils exposed in all stratigraphic levels consist of Thalassinoides, Chondrites, Cruziana and Planolites. They are commonly found in a series of thin to medium bedded fine grained turbiditic sandstones intercalated with shales. Hereinafter, the integration analysis in between sedimentology and ichnology data, the sediment shed into the basin in the submarine channelized related to slope system. Such findings cast no doubt as to whether integrated sedimentary facies and ichnofacies analysis can be viewed as precise methods for sedimentary basin interpretation, in which external parameter, for example magmatic processes, also are considered to play a role.
{"title":"Lithofacies and ichnofacies of turbidite deposits, West Java, Indonesia","authors":"B. Muljana, U. Mardiana, Adi Hardiyono, N. Sulaksana, D. J. Setiadi, Lia Jurnaliah, Nurdrajat","doi":"10.37520/fi.2021.001","DOIUrl":"https://doi.org/10.37520/fi.2021.001","url":null,"abstract":"This study focuses on the analysis of sedimentary facies and ichnogenus variations to determine the palaeogeographic setting of turbidite deposits that are clearly exposed in the surroundings of Majalengka area, West Java, Indonesia. Lithofacies variation in turbidite deposits, identified from detailed stratigraphic sections, were visually presented as a composite log and indicated a thickening and coarsening pattern due to a regressive event. Trace fossils exposed in all stratigraphic levels consist of Thalassinoides, Chondrites, Cruziana and Planolites. They are commonly found in a series of thin to medium bedded fine grained turbiditic sandstones intercalated with shales. Hereinafter, the integration analysis in between sedimentology and ichnology data, the sediment shed into the basin in the submarine channelized related to slope system. Such findings cast no doubt as to whether integrated sedimentary facies and ichnofacies analysis can be viewed as precise methods for sedimentary basin interpretation, in which external parameter, for example magmatic processes, also are considered to play a role.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69920642","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}
Baragwanathia brevifolioides is established as a nomen novum for B. brevifolia P.Kraft et Kvaček, 2017, recently described from the Silurian of the Prague Basin, Czech Republic and revealed as a later homonym of B. brevifolia Hundt, 1952.
Baragwanathia brevifolioides被确定为B. brevifolia p.k kraft et kva ek, 2017，最近从捷克共和国布拉格盆地志留系描述，并被揭示为B. brevifolia Hundt, 1952的后期同音。
{"title":"Baragwanathia brevifolioides, a nomen novum for B. brevifolia P.Kraft et Kvaček, 2017","authors":"P. Kraft, Z. Kvaček","doi":"10.37520/fi.2021.006","DOIUrl":"https://doi.org/10.37520/fi.2021.006","url":null,"abstract":"Baragwanathia brevifolioides is established as a nomen novum for B. brevifolia P.Kraft et Kvaček, 2017, recently described from the Silurian of the Prague Basin, Czech Republic and revealed as a later homonym of B. brevifolia Hundt, 1952.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69921019","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}
Late Cretaceous mesofossils are described from the Zliv-Řídká Blana locality in the South Bohemian Basins, the Czech Republic. Angiosperm remains dominate the fossil assemblage both in terms of taxonomic diversity and quantitatively, with about 65 different species based on about 1,000 specimens of flowers, fruits and seeds. There are surprisingly few nonangiosperm species in the flora, with only four specimens assigned to bryophytes, ferns and conifers. There are no megaspores of Selaginellales or Salviniales, which are otherwise common in many Cretaceous mesofossil floras. Among angiosperms, flowers and fruits assigned to the Normapolles group (Fagales) and to the Ericales are particularly prominent. In systematic composition as well as general organization and size of the angiosperm reproductive organs, the Zliv-Řídká Blana mesofossil flora is comparable to other Late Cretaceous mesofossil floras collected from various regions of Laurasia. In addition to the plant remains, the fossil assemblage also includes insect eggs and coprolites.
{"title":"Plant mesofossils from the Late Cretaceous Klikov Formation, the Czech Republic","authors":"Z. Hermanova, J. Kvaček, E. M. Friis","doi":"10.37520/fi.2021.018","DOIUrl":"https://doi.org/10.37520/fi.2021.018","url":null,"abstract":"Late Cretaceous mesofossils are described from the Zliv-Řídká Blana locality in the South Bohemian Basins, the Czech Republic. Angiosperm remains dominate the fossil assemblage both in terms of taxonomic diversity and quantitatively, with about 65 different species based on about 1,000 specimens of flowers, fruits and seeds. There are surprisingly few nonangiosperm species in the flora, with only four specimens assigned to bryophytes, ferns and conifers. There are no megaspores of Selaginellales or Salviniales, which are otherwise common in many Cretaceous mesofossil floras. Among angiosperms, flowers and fruits assigned to the Normapolles group (Fagales) and to the Ericales are particularly prominent. In systematic composition as well as general organization and size of the angiosperm reproductive organs, the Zliv-Řídká Blana mesofossil flora is comparable to other Late Cretaceous mesofossil floras collected from various regions of Laurasia. In addition to the plant remains, the fossil assemblage also includes insect eggs and coprolites.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69921513","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}
A specimen of Araucaria fricii is described from the upper part of the Teplice Formation in the Bohemian Cretaceous Basin. It extends the first occurrence of A. fricii from the mid-Coniacian back to the early Coniacian. Found in the Radovesice locality near Kučlín in the northern part of the Czech Republic, it is characterised by a deltoid cone scale complex with a centrally placed seed. It is compared to the type material of A. fricii from the mid-Coniacian Březno Formation and other European Cretaceous species of Araucaria. The taphonomy and palaeoecology of A. fricii is briefly discussed.
{"title":"A new specimen of Araucaria fricii from the early Coniacian of the Bohemian Massif, Central Europe","authors":"J. Kvaček","doi":"10.37520/fi.2021.020","DOIUrl":"https://doi.org/10.37520/fi.2021.020","url":null,"abstract":"A specimen of Araucaria fricii is described from the upper part of the Teplice Formation in the Bohemian Cretaceous Basin. It extends the first occurrence of A. fricii from the mid-Coniacian back to the early Coniacian. Found in the Radovesice locality near Kučlín in the northern part of the Czech Republic, it is characterised by a deltoid cone scale complex with a centrally placed seed. It is compared to the type material of A. fricii from the mid-Coniacian Březno Formation and other European Cretaceous species of Araucaria. The taphonomy and palaeoecology of A. fricii is briefly discussed.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69921581","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}
A distinctive feature of the major eudicot diversification that occurred through the Late Cretaceous is the unequivocal presence of Cornales and diverse Ericales. Here we describe well-preserved fossil flowers from the Mira locality in western Portugal, of Campanian-Maastrichtian age, that we assign to a new extinct genus of Ericales with two new species; Miranthus elegans gen. et sp. nov. and Miranthus kvacekii sp. nov. The fossil flowers are pedicellate, structurally bisexual, actinomorphic, pentamerous and isomerous, with five narrowly triangular persistent calyx lobes, a five-lobed corolla, five antepetalous stamens, five staminodes alternating with the petals and a semi-inferior, unilocular ovary. The ovary consists of five carpels and has a raised nectariferous ring with stomata-like openings above the insertion of the perianth, and a long five-angled style. A key feature, which confirms a relationship with Primulaceae s. l., is the free, central dome-shaped placenta that bears numerous, densely spaced ovules. The ovary matures into a capsule containing many, minute, reticulate seeds. Flowers of Miranthus are especially similar to those of extant Samolus, a genus of about twelve species that is sister group to other genera of subfamily Theophrastoideae and that has a disjunct distribution mainly in the Southern Hemisphere. Miranthus also appears to have grown in environments influenced by marine conditions, an ecological preference also seen in Samolus. Miranthus expands the diversity of Ericales known from the Late Cretaceous, and together with previously described fossils provides further evidence that the diversification of Ericales was already underway by the Campanian-Maastrichtian stages of the Late Cretaceous.
{"title":"Early flowers of primuloid Ericales from the Late Cretaceous of Portugal and their ecological and phytogeographic implications","authors":"E. M. Friis, P. Crane, K. Pedersen","doi":"10.37520/fi.2021.016","DOIUrl":"https://doi.org/10.37520/fi.2021.016","url":null,"abstract":"A distinctive feature of the major eudicot diversification that occurred through the Late Cretaceous is the unequivocal presence of Cornales and diverse Ericales. Here we describe well-preserved fossil flowers from the Mira locality in western Portugal, of Campanian-Maastrichtian age, that we assign to a new extinct genus of Ericales with two new species; Miranthus elegans gen. et sp. nov. and Miranthus kvacekii sp. nov. The fossil flowers are pedicellate, structurally bisexual, actinomorphic, pentamerous and isomerous, with five narrowly triangular persistent calyx lobes, a five-lobed corolla, five antepetalous stamens, five staminodes alternating with the petals and a semi-inferior, unilocular ovary. The ovary consists of five carpels and has a raised nectariferous ring with stomata-like openings above the insertion of the perianth, and a long five-angled style. A key feature, which confirms a relationship with Primulaceae s. l., is the free, central dome-shaped placenta that bears numerous, densely spaced ovules. The ovary matures into a capsule containing many, minute, reticulate seeds. Flowers of Miranthus are especially similar to those of extant Samolus, a genus of about twelve species that is sister group to other genera of subfamily Theophrastoideae and that has a disjunct distribution mainly in the Southern Hemisphere. Miranthus also appears to have grown in environments influenced by marine conditions, an ecological preference also seen in Samolus. Miranthus expands the diversity of Ericales known from the Late Cretaceous, and together with previously described fossils provides further evidence that the diversification of Ericales was already underway by the Campanian-Maastrichtian stages of the Late Cretaceous.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69921193","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}
Miguel Prôa, Daniel Pouit, T. Rouillard, P. Vincent, Benoît Mellier
The use of CT scans in palaeontology has a long history. Most X-ray CT scans of fossils are carried out on previously prepared specimens and seldom on unprepared blocks of fossils. Here we report the use of a standard medical X-ray CT scanner to detect vertebrate and invertebrate fossils inside limestone blocks as an aid to subsequent preparation. The results were largely successful, with low-resolution images and radiodensity thresholds which nevertheless created sufficient contrast for identification of objects and their location inside blocks of limestone, thus optimizing the allocation of time and resources for palaeontological preparation. We conclude that the use of medical X-ray CT scanners for an initial visual inspection of limestone blocks for the presence of below the surface fossils is possible, cost effective and reliable. In addition, it allows the original raw data to be preserved as a digital object. The advantages of making use of standard medical X-ray CT scanners to facilitate palaeontological preparation under logistic or budgetary limitations is becoming more and more apparent.
{"title":"Hidden treasures uncovered: successful detection of fossils below the surface in large limestone blocks using a standard medical X-ray CT scanner","authors":"Miguel Prôa, Daniel Pouit, T. Rouillard, P. Vincent, Benoît Mellier","doi":"10.37520/fi.2021.004","DOIUrl":"https://doi.org/10.37520/fi.2021.004","url":null,"abstract":"The use of CT scans in palaeontology has a long history. Most X-ray CT scans of fossils are carried out on previously prepared specimens and seldom on unprepared blocks of fossils. Here we report the use of a standard medical X-ray CT scanner to detect vertebrate and invertebrate fossils inside limestone blocks as an aid to subsequent preparation. The results were largely successful, with low-resolution images and radiodensity thresholds which nevertheless created sufficient contrast for identification of objects and their location inside blocks of limestone, thus optimizing the allocation of time and resources for palaeontological preparation. We conclude that the use of medical X-ray CT scanners for an initial visual inspection of limestone blocks for the presence of below the surface fossils is possible, cost effective and reliable. In addition, it allows the original raw data to be preserved as a digital object. The advantages of making use of standard medical X-ray CT scanners to facilitate palaeontological preparation under logistic or budgetary limitations is becoming more and more apparent.","PeriodicalId":12431,"journal":{"name":"Fossil Imprint","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69920957","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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