Fossil Imprint最新文献_第4页

Late Bashkirian ammonoids from the Mospyne Formation of the Donets Basin, Ukraine 乌克兰顿涅茨盆地mosspyne组的巴什基利亚晚期菊石

Fossil Imprint Pub Date : 2022-01-01 DOI: 10.37520/fi.2022.021

V. Dernov

引用次数: 0

The Early Cretaceous mesofossil flora of Catefica, Portugal: angiosperms 葡萄牙Catefica早白垩世中化石区系:被子植物

Fossil Imprint Pub Date : 2022-01-01 DOI: 10.37520/fi.2022.016

E. M. Friis, P. Crane, K. Pedersen, M. Mendes, J. Kvaček

{"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}

引用次数: 1

Actinopterygians of the Broumov Formation (Permian) in the Czech part of the Intra-Sudetic Basin (the Czech Republic) 捷克境内苏德海盆地捷克部分Broumov组(二叠纪)的放光翼类

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.008

S. Štamberg

引用次数: 1

Angiosperm diversification in the Early Cretaceous of Primorye, Far East of Russia 俄罗斯远东滨海地区早白垩世被子植物的多样化

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.017

L. Golovneva, E. Bugdaeva, E. Volynets, Yuewu Sun, A. Zolina

引用次数: 2

Lithofacies and ichnofacies of turbidite deposits, West Java, Indonesia 印度尼西亚西爪哇浊积岩沉积的岩相和鱼相

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.001

B. Muljana, U. Mardiana, Adi Hardiyono, N. Sulaksana, D. J. Setiadi, Lia Jurnaliah, Nurdrajat

引用次数: 0

Baragwanathia brevifolioides, a nomen novum for B. brevifolia P.Kraft et Kvaček, 2017 Baragwanathia brevifolioides，B.brevifolia P.Kraft et Kvaček的新名称，2017

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.006

P. Kraft, Z. Kvaček

引用次数: 2

Plant mesofossils from the Late Cretaceous Klikov Formation, the Czech Republic 捷克共和国晚白垩纪Klikov组的植物中化石

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.018

Z. Hermanova, J. Kvaček, E. M. Friis

引用次数: 4

A new specimen of Araucaria fricii from the early Coniacian of the Bohemian Massif, Central Europe 来自中欧波西米亚山脉早期Coniacian的Araucaria friicii新标本

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.020

J. Kvaček

引用次数: 2

Early flowers of primuloid Ericales from the Late Cretaceous of Portugal and their ecological and phytogeographic implications 葡萄牙晚白垩世报春花的早期花及其生态和植物地理学意义

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.016

E. M. Friis, P. Crane, K. Pedersen

{"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}

引用次数: 1

Hidden treasures uncovered: successful detection of fossils below the surface in large limestone blocks using a standard medical X-ray CT scanner 隐藏的宝藏被发现:使用标准的医用x射线CT扫描仪成功地探测到地表以下的大型石灰石块中的化石

Fossil Imprint Pub Date : 2021-01-01 DOI: 10.37520/fi.2021.004

Miguel Prôa, Daniel Pouit, T. Rouillard, P. Vincent, Benoît Mellier

{"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}

引用次数: 1