The diversity of Acer foliage and fruits (798 specimens) of the fossil-rich diatomitic sediments ... more The diversity of Acer foliage and fruits (798 specimens) of the fossil-rich diatomitic sediments of the Sisian Formation in the Vorotan River Basin, Syunik region, southern Armenia, has been investigated. Based on foliage and fruitlets Acer cf. cappadocicum Gleditsch, A. cf. heldreichii Orphanides ex Boissier ssp. trautvetteri (Medwedev) Murray, A. cf. hyrcanum Fischer & C.A. Meyer, A. cf. ibericum Bieberstein
Vegetation and climate are investigated based on leaf-, pollen- and seed-floras from the Central ... more Vegetation and climate are investigated based on leaf-, pollen- and seed-floras from the Central Paratethys region correlated to the Pannonian (Upper Miocene, Central Paratethys chronostratigraphi- cal stage). Waterplant-communities, reed facies, riparian forests and swamp forests can be distinguished along with forests comparable to mixed-mesophytic ones rich in species with dominance of deciduous taxa over evergreens and conifers. The percentage of evergreen species increases towards the southeast part of the investigated area. Conifer taxa are supposed to be of prevailing importance in mountainous forests. Arguments for either xeromorphic mediterranean-like vegetation or for steppe-like conditions (extensive dry grassland) are scarce and probably invalid. The fossil plant record indicates a warm-temperate climate without remarkable dry season (Cfa- type sensu KOPPEN).
... Falorni (19881989) listed separately the taxa occurring in the lower layer (Gabbro I: Villa ... more ... Falorni (19881989) listed separately the taxa occurring in the lower layer (Gabbro I: Villa Nardi); but still the precise occurrence of several species in the upper layer (Gabbro II: Pane e Vino) is not clear (hence the many question marks in Table 1). Re-examining the properly ...
The tridactyl horse Hipparion (s.l.) has long attracted the attention of paleontologists and geol... more The tridactyl horse Hipparion (s.l.) has long attracted the attention of paleontologists and geologists alike for its potential use as a stratigraphic and paleoenvironmental index. A central dogma surrounding this horse's record is that it first occurred abruptly and instantaneously throughout the Old World ca. 12.5 Ma, heralding a general late Miocene environmental shift from forest to savanna ecosystems. We present data on the oldest known Central European hipparions, “Hipparion” primigenium (s.s.), that bear on these issues. Our analysis of the local Vienna Basin stratigraphie sequence and Paratethys geochronology suggests that hipparion's first provincial occurrence was ca. 11.0–11.5 Ma. We falsify the hypotheses of an Old World “Hipparion Datum” and the purported initial association of this horse with savanna habitats. An explicit cladistic analysis of “Hipparion” primigenium (s.s.), its North American sister taxon Cormohipparion occidentale, and several Old World primitive hipparions (“Group 1”) suggests that several distinct lineages may have been derived from “Hipparion” primigenium (s.s.). We attribute trans-Eurasian and North African speciation of “Group 1” horses to provincial environmental change which fragmented species ranges (environmental vicariance), and adaptations to newly emergent ecosystems.
Two fossil plant assemblages from the base of the lignite-bearing sequence of the opencast mine O... more Two fossil plant assemblages from the base of the lignite-bearing sequence of the opencast mine Oberdorf are investigated. Leaf, pollen, and diaspore records are studied. This method — integrating the results obtained for the different plant organs — provides more far-reaching conclusions than the study of the fossil remains of only individual plant organs. The different disciplines complement one another. `Castanopsis' bavarica, Poliothyrsis eurorimosa, Distylium cf. uralense, Laurophyllum markvarticense, Laurophyllum pseudovillense, Eomastixia are reported for the first time from Austria. The analysed assemblages prove the existence of a vegetation which may be best characterized as of the `Younger Mastixioid' type (sensu Mai, 1964). It existed in the Köflach-Voitsberg surroundings adjacent to the wetlands during the depositional phase of the lignite-bearing sequence (Early Miocene, Ottnangian/Karpatian). The results constitute the first proof of a species-rich Younger Mastixioid assemblage from Austria.
Abstract: The studied sections are situated on the northwestern margin of the Vienna Basin. They ... more Abstract: The studied sections are situated on the northwestern margin of the Vienna Basin. They represent a characteristic marginal facies of Lake Pannon in the late Miocene Pannonian stage. Biofacies as well as lithofacies point to a transgressive event resulting ...
The diversity of Acer foliage and fruits (798 specimens) of the fossil-rich diatomitic sediments ... more The diversity of Acer foliage and fruits (798 specimens) of the fossil-rich diatomitic sediments of the Sisian Formation in the Vorotan River Basin, Syunik region, southern Armenia, has been investigated. Based on foliage and fruitlets Acer cf. cappadocicum Gleditsch, A. cf. heldreichii Orphanides ex Boissier ssp. trautvetteri (Medwedev) Murray, A. cf. hyrcanum Fischer & C.A. Meyer, A. cf. ibericum Bieberstein
Vegetation and climate are investigated based on leaf-, pollen- and seed-floras from the Central ... more Vegetation and climate are investigated based on leaf-, pollen- and seed-floras from the Central Paratethys region correlated to the Pannonian (Upper Miocene, Central Paratethys chronostratigraphi- cal stage). Waterplant-communities, reed facies, riparian forests and swamp forests can be distinguished along with forests comparable to mixed-mesophytic ones rich in species with dominance of deciduous taxa over evergreens and conifers. The percentage of evergreen species increases towards the southeast part of the investigated area. Conifer taxa are supposed to be of prevailing importance in mountainous forests. Arguments for either xeromorphic mediterranean-like vegetation or for steppe-like conditions (extensive dry grassland) are scarce and probably invalid. The fossil plant record indicates a warm-temperate climate without remarkable dry season (Cfa- type sensu KOPPEN).
... Falorni (19881989) listed separately the taxa occurring in the lower layer (Gabbro I: Villa ... more ... Falorni (19881989) listed separately the taxa occurring in the lower layer (Gabbro I: Villa Nardi); but still the precise occurrence of several species in the upper layer (Gabbro II: Pane e Vino) is not clear (hence the many question marks in Table 1). Re-examining the properly ...
The tridactyl horse Hipparion (s.l.) has long attracted the attention of paleontologists and geol... more The tridactyl horse Hipparion (s.l.) has long attracted the attention of paleontologists and geologists alike for its potential use as a stratigraphic and paleoenvironmental index. A central dogma surrounding this horse's record is that it first occurred abruptly and instantaneously throughout the Old World ca. 12.5 Ma, heralding a general late Miocene environmental shift from forest to savanna ecosystems. We present data on the oldest known Central European hipparions, “Hipparion” primigenium (s.s.), that bear on these issues. Our analysis of the local Vienna Basin stratigraphie sequence and Paratethys geochronology suggests that hipparion's first provincial occurrence was ca. 11.0–11.5 Ma. We falsify the hypotheses of an Old World “Hipparion Datum” and the purported initial association of this horse with savanna habitats. An explicit cladistic analysis of “Hipparion” primigenium (s.s.), its North American sister taxon Cormohipparion occidentale, and several Old World primitive hipparions (“Group 1”) suggests that several distinct lineages may have been derived from “Hipparion” primigenium (s.s.). We attribute trans-Eurasian and North African speciation of “Group 1” horses to provincial environmental change which fragmented species ranges (environmental vicariance), and adaptations to newly emergent ecosystems.
Two fossil plant assemblages from the base of the lignite-bearing sequence of the opencast mine O... more Two fossil plant assemblages from the base of the lignite-bearing sequence of the opencast mine Oberdorf are investigated. Leaf, pollen, and diaspore records are studied. This method — integrating the results obtained for the different plant organs — provides more far-reaching conclusions than the study of the fossil remains of only individual plant organs. The different disciplines complement one another. `Castanopsis' bavarica, Poliothyrsis eurorimosa, Distylium cf. uralense, Laurophyllum markvarticense, Laurophyllum pseudovillense, Eomastixia are reported for the first time from Austria. The analysed assemblages prove the existence of a vegetation which may be best characterized as of the `Younger Mastixioid' type (sensu Mai, 1964). It existed in the Köflach-Voitsberg surroundings adjacent to the wetlands during the depositional phase of the lignite-bearing sequence (Early Miocene, Ottnangian/Karpatian). The results constitute the first proof of a species-rich Younger Mastixioid assemblage from Austria.
Abstract: The studied sections are situated on the northwestern margin of the Vienna Basin. They ... more Abstract: The studied sections are situated on the northwestern margin of the Vienna Basin. They represent a characteristic marginal facies of Lake Pannon in the late Miocene Pannonian stage. Biofacies as well as lithofacies point to a transgressive event resulting ...
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Papers by Johanna Eder