Grzegorz Worobiec

Grzegorz Worobiec
W. Szafer Institute of Botany, Polish Academy of Sciences · Palaeobotany

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Publications

Publications (42)
Article
Full-text available
Pterocarya fraxinifolia, native to the southern Caucasus and adjacent areas, has been widely introduced in Europe. In this study, we investigate the following: (1) How did its current distribution form? (2) What are the past, current, and future suitable habitats of P. fraxinifolia? (3) What is the best conservation approach? Ecological niche model...
Article
The paper presents results of a palaeobotanical investigation of the borehole core Komorniki 97/72 from the Ruja lignite deposit, Lower Silesia. In the deposit lignites of three (2nd Lusatian, 2nd A Lubin, and 1st mid-Polish) middle Miocene groups of seams are present. The lignites of the 1st and 2nd groups are important correlation horizons throug...
Article
The remains of fungi from a wetland environment have been found during palynological investigations of the middle Miocene lignite seam of the Adamów Lignite Mine (central Poland). One new fossil-genus Pleosporomyces and five new fossil-species (Canalisporium lignitum, Dictyosporites muriformis, Dictyosporites zeaformis, Microthyriacites radiatus, a...
Article
Full-text available
Many geological problems have not been convincingly explained so far and are debatable, for instance the origin and changes of the Neogene depositional environments in central Poland. Therefore, these changes have been reconstructed in terms of global to local tectonic and climatic fluctuations. The examined Neogene deposits are divided into a sub-...
Article
We reconstruct palaeoenvironmental conditions during the formation of the first Mid-Polish Lignite Seam (MPLS-1) of the Konin Basin of central Poland, which is of mid-Miocene age. In terms of macropetrography, the MPLS-1 comprises different lithotype associations, predominantly xylodetritic lignite, and represents the peat deposits of mires most li...
Article
This paper presents the reinterpretation of the taxonomic position of fossil epiphyllous callimothalloid fungi belonging to the fossil-genera Callimothallus (hitherto classified to the family Microthyriaceae) and Cribrites (?Microthyriales). These fungi thrived from the Late Cretaceous up to the Holocene. Investigation are based on collected materi...
Article
Full-text available
Fungal sporocarps having ostiole with setae were found in the upper Pliocene deposits from Mizerna (borehole Mizerna-Nowa), southern Poland. These remains morphologically correspond to the fossil-genus Trichothyrites Rosend., although the structure of the ostiolar collar with non-septate setae seems unique and is typical for sporocarps (catathecia)...
Article
Full-text available
The Bełchatów Lignite Mine of Poland is a treasure-cove for mid-to late Miocene plant and animal fossils, deposited in a slow-flowing river valley with swamps and oxbow lakes. Here, we report the finding of abundant fossil anomopod cladocerans. Some are three-dimensionally preserved, including the taxonomically important trunk limbs. They pertain t...
Article
Full-text available
Fossil plant macroremains preserved in laminated diatomites from Łysa Góra near Rębiszów, Lower Silesia, have been documented for the first time. The fossil assemblage consists mostly of leaves, but fruits, seeds and sporadic flowers also occur. Forty-three identified taxa represent nineteen plant families: Aceraceae, Berberidaceae, Betulaceae, Cor...
Article
The 1st mid-Polish group is the youngest among the main Neogene lignite seams in Poland. Lignites of this group developed in the middle Miocene in almost the whole of Poland, and therefore they are an important correlation horizon throughout much of the Polish Lowlands. A total of 30 palynological samples from the 3-metre thick seam from the Adamów...
Article
Integration of isolated parts of fossil plants into one plant is one of the most important goals in the whole-plant reconstruction concept in paleobotany. Three fossil-species, Laria rueminiana (Heer) G. Worobiec & Kvaček (leaves), Reevesia hurnikii Kvaček (the capsule valve of fruit), and Reevesiapollis triangulus (Mamczar) Krutzsch (pollen grains...
Article
Full-text available
Interesting fungal remains were encountered during palynological investigation of the Neogene deposits at the Gray Fossil Site, Washington County, Tennessee, USA. Both Cephalothecoidomyces neogenicus and Trichothyrites cf. padappakarensis are new for the Neogene of North America, while remains of cephalothecoid fungus Cephalothecoidomyces neogenicu...
Article
Full-text available
Fossil fungal fructifications were encountered during palynological investigation of the Miocene deposits of the Bełchatów Lignite Mine (Central Poland). Five fossil taxa similar to family Microthyriaceae (Phragmothyrites cf. lutosus (Dilcher) R.K. Kar & R.K. Saxena, Phragmothyrites sp. 1, Phragmothyrites sp. 2, Trichothyrites cf. hordlensis P.H. S...
Article
Fragments of cephalothecoid fructifications (peridia) were encountered during palynological investigations of Neogene deposits in Mizerna-Nowa/Poland and Adendorf/Germany. Isolated plates of cephalothecoid ascoma in shape and cellular structure similar to the extant members of the family Cephalothecaceae are described as Cephalothecoidomyces neogen...
Article
Some fragments of cephalothecoid fructifications (peridia) were encountered during palynological investigations of Neogene deposits in Mizerna-Nowa/Poland and Adendorf/Germany. Isolated plates of cephalothecoid ascoma which shape and cellular structure similar to the extant members of the family Cephalothecaceae were described as Cephalothecoideomy...
Article
Full-text available
Well-preserved leaf macroremains collected in the Bełchatów Lignite Mine (Central Poland) were investigated. Fossil leaves of Acer, Dicotylophyllum, Fagus, Eucommia, Laria, Laurophyllum, Liquidambar, Pinus, Populus, Pterocarya, Quercus, Salix, Salvinia, Taxodium, Ulmus, Vitis, and Zelkova, and fossil fruit of Eucommia were found in fossil assemblag...
Article
Full-text available
During a palynological analysis of four samples from the Bełchatów KRAM-P 218 collection of plant macroremains 95 fossil species of sporomorphs were identified. Among the non-pollen palynomorphs was the fossil species Desmidiaceaesporites cosmarioformis, previously not reported from fossil floras of Poland, most probably related to the zygospores o...
Article
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Latest Eocene plant macrofossils and trace fossils collected a century ago by Wiktor Kuźniar are revised and their stratigraphical and palaeoecological meaning is re-considered. They derive from marine limestones and marls cropping out on the northern slope of the Hruby Regiel mountain in the Western Tatra Mountains. Leaves belonging to the familie...
Article
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The Zoloushka Cave belongs to a group of the largest gypsum caves in Western Ukraine (Bukovina region), developed in the middle Miocene (upper Badenian) evaporite series (Tyras Formation) on the SW periphery of the East European Platform. It is developed in the lower part of the evaporite series composed of gypsum, which is covered by a carbonate l...
Article
Full-text available
Leaf macroremains collected in the Bełchatów Lignite Mine (central Poland) were investigated. The fossil assemblage consists of leaves of Acer, Betula, Carpinus, Dicotylophyllum, Fagus, ?Magnolia, “Parrotia”, Pinus, Quercus, and Zelkova. Mesophytic (zonal) elements dominate, with admixture of riparian (azonal) leaf taxa. The floristic composition p...
Article
Full-text available
Fructifications of epiphyllous fungi were encountered during palynological investigation of the Lower Oligocene shallow-marine deposits of the Krabbedalen Formation at the Savoia Halvø, Kap Brewster, central East Greenland. Six fossil taxa from the family Microthyriaceae (Phragmothyrites kangukensis Kalgutkar, Phragmothyrites sp., Plochmopeltinites...
Article
The Upper Miocene plant macroremains (mainly leaves) collected in the Bełchatów Lignite Mine (Central Poland) were investigated and supplemented with palynological analysis. In the fossil fl ora there were found macroremains of Acer, Betula, Carpinus, Dicotylophyllum, Fagus, Laria, Liquidambar, Populus, Pterocarya, Quercus, Reevesia, Salix, Taxodiu...
Article
New interpretation of leaf fossils from the Neogene of Europe belonging to the family Malvaceae s.l. is given. Morphogenera Dombeyopsis Unger emend., Byttneriophyllum Givulescu ex Knobloch et Kvacek, and Laria G. Worobiec et Kvacek morphogen. nov., considered monotypic in our revision, are newly circumscribed. Particularly well-preserved leaves rep...
Article
Full-text available
Tetraploa aristata Berkeley & Broome represents the anamorphic stage of a pleomorphic fungus with holomorph Tetraplosphaeria tetraploa (Scheuer) Kaz. Tanaka & K. Hiray (Lophiostoma tetraploa (Scheuer) Aptroot & K.D. Hyde). Until now this taxon has not been reported in Poland, where it is probably on the fringe of its distribution. Conidia of Tetrap...
Article
The paper presents results of pollen analysis of the Upper Miocene deposits from a borehole at Józefina (Kraków-Silesia Upland, central Poland), including data concerning bamboo type pollen grains, as well other sporomorphs (pollen, spores and freshwater phytoplankton). Fossil pollen grains of bamboos (Graminidites bambusoides Stuchlik) were found...
Article
Full-text available
Dispersed cuticles from two boreholes, Komorniki 97/72 and 97/73, drilled in Ruja lignite deposit near Legnica, Lower Silesia, Poland were investigated. Altogether 19 taxa from 13 genera were identifi ed, belonging to 11 families of pteridophyta, gymnosperms and angiosperms. Two new taxa were described (Salix semihausruckensis sp. nov. and Dicotylo...
Article
Full-text available
Fossil plant remains (mainly macroremains of leaves and sporomorphs) were investigated from two boreholes of Ruja lignite deposit near Legnica, Lower Silesia, Poland. In the fossil plant assemblages there were found 34 taxa belonging to the families Betulaceae, Blechnaceae, Cercidiphyllaceae, Cupressaceae, Fagaceae, Hydrocharitaceae, Juglandaceae,...
Article
The Zygnemataceae are an extant family of freshwater filamentous green algae which produce acid-resistant zygospores. Palynomorphs of probable zygmatacean affinity occur in sediments of the Carboniferous to Holocene age (van Geel & Grenfell, 1996). These algae reproduce using four types of spores, but only zygospores and probably aplanospores are a...
Article
This paper presents the results of a study of leaf macroremains of Betulaceae found in the Miocene deposits of the Bełchatów Lignite Mine. Besides revision of leaf taxa described in earlier publications on Bełchatów deposits, the examination of newly collected fossil leaves has been done. Isolation of leaf compressions and cuticular analysis were a...
Article
Macromorphology and epidermal micromorphology of a leaf fragment belonging to Laurus abcha-sica (Kolakovsky & Shakryl) Ferguson from the Neogene aged deposits of the Bełchatów Lignite Mine (Central Poland) are described. Litsaeophyllum miocenicum Juchniewicz from Turów is revised and also assigned to Lau-rus abchasica. The fossil record of other La...
Article
Recently discovered fossil bamboo leaves and pollen are described from the Neogene of Poland. Morphological analysis of fossil leaves from the Late Miocene deposits of the Bełchatów Lignite Mine, Central Poland have allowed them to be determined as “Bambusa” lugdunensis Saporta. It is the first record of this species in the Cenozoic of Poland. The...
Article
The study area near village Witów situated about 50 kilometres north-east of the Kraków city is famous for its exposed deposits called the "Witów Series" on which palaeobotanical, micro- and macrofaunistic, malacological, sedimentological and petrographical studies have already been performed. From deposits of the Witów Series, plant macroremains b...
Article
Leaf slides prepared from separated Tertiary leaf compressions are valuable tools for taxonomic investigations of fossil leaf assemblages. Slides such as these help considerably in morphological investigations of fossil leaves allowing examination of their minute morphological structures. Procedures for preparing leaf slides from leaf compressions...
Article
Macroremains of plants (leaves, fruits, shoots) in the Witów Series at Witów as impressions preserved in poorly cemented occur and mudstones. Coniferous plants are represented by Pinus cf. palaeostrobus (Ettingshausen) Heer, and other, indeterminate remains. Remains of dicotyledons belong to species Zelkova zelkovifolia (Unger) Bůžek et Kotlaba, ge...
Article
The shoots of four species of Cupressaceae s. l. from Miocene clays of Bełchatów and Lipnica Wiel-ka, Poland, contain biomarkers which derive from the resins and waxes of the fossil conifers. Major compound classes are aliphatic lipids, terpenoids, and steroids. Some of the identified compounds are the diagenetic pro-ducts of biolipids known from e...
Article
The megafossils from the fluvial sediments overlying the Tertiary lignites in the Bełchatów opencast mine (Middle Poland) are investigated. The good preservation allowed the cellular detail of the leaves and fruit- and seed coats to be studied. This enabled accurate identifications to be made. Some of the genera (Cleome, Ternstroemites and Zingiber...
Article
Megafossils found in the Jasło limestones at Sobniow are described. The abundant ichtyofauna from this locality is well known (Jerzmańska, 1960). Most of the specimens consist of imprints of the vegetative parts of algal bodies Algites spp. The Phanerophyta are represented by leaves (or leaflets) of dicotyledons: ?Palaeocarya sp., Laurophyllum prin...
Article
This study deals with plant remains, chiefly leaves, from a layer of clays overlying the paratonstein layer TS-3 (vel TS-4) in Brown Coal Mine 'Belchatow', dated by the fission track method at 18.1 ± 1.7 Ma. The plant remains determined belonged to the families Aceraceae, Altingiaceae, Betulaceae, Cupressaceae, Fagaceae, Hydrocharitaceae, Juglandac...
Article
An outcrop on the Bystry Stream in the Orawa-Nowy Targ Basin shows a Neogene complex of sedimentary rocks in which an intercalation of pyroclastic deposits with plant remains was found. These deposits were dated by uranium-track method at 8.7 ± 0.6 million years BP. The fossil remains are preserved in the form of leaf and shoot impressions, represe...

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Projects (3)
Project
sedimentological, mineralogical, petrographic, palynological, and geochemical characteristics of the sediments: underlying MPLS-1 (mainly sands), lignite-bearing (mainly lignites of MPLS-1), and overlying MPLS-1 (the so-called “Poznań clays”, mostly muds); determination of the depositional environment (river and mire types), which was related to the deposition of various lithologically rocks such as sands, lignites, and muds; new proposal of depositional and palaeogeographic models for 4 time periods: before ~15.5 Ma (sediments underlying MPLS-1), ~15.5–15 Ma (lignite seam, i.e. MPLS-1), ~15–13.5 Ma (grey clays overlying MPLS-1) and after ~13.5 Ma (“Poznań clays).
Project
The main aim of this project is to determine the changes of depositional environments in central Poland during the Mid-Miocene, that is, ca. 15±1.5 Ma. These changes will be presented in the context of climatic fluctuations and intense vertical movements of the Carpathian-Alpine orogen as well as slight lowering of the Polish Lowlands area. On the basis of preliminary studies, we believe that all lithologically varied the Mid-Miocene sediments in central Poland (sands, lignites and overlying muds, so-called "Poznań clays") are genetically related to different types of fluvial environment. Therefore, determining the river type (braided, meandering, anastomosing), in which environments were formed deposits of various lithologically (sands, lignites, muds) seems to be a very important part of this project.
Project
NECLIME is an open international network of scientists working on Cenozoic climate evolution and related changes of continental ecosystems. During the past 65 million years of Earth history, globally warmer-then-present conditions prevailed in a world with almost modern paleogeography. These timespans represent promising case studies for anticipated future scenarios. Within the NECLIME network, we aim to combine data on past climate change and its environmental impact for large-scale reconstructions. NECLIME research activities comprise paleoclimate reconstructions, including atmospheric CO₂ and ecosystem analysis using multiple quantitative methods on various primarily continental proxies (plants; vertebrates; invertebrates; geochemistry and geological proxies). Complementing model studies are employed to assess connections and processes driving ocean, atmosphere and biosphere at global and regional scales. NECLIME was established in 1999 with the aim to understand Neogene trends across Eurasia. This basic idea quickly and constantly expanded to a global interest and a wider stratigaphical frame. The steadily growing NECLIME network with currently around 140 members in 34 countries is coordinated by a team of researchers and an advisory board. NECLIME holds annual conferences and workshops and administers working groups bringing forward scientific exchange, joint projects, and the integration of research data. For more information go to www.neclime.de