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Samartin S.,University of Bern | Heiri O.,University of Bern | Lotter A.F.,Laboratory of Palaeobotany and Palynology | Tinner W.,University of Bern
Climate of the Past | Year: 2012

Chironomids preserved in a sediment core from Lago di Origlio (416 masl.), a lake in the foreland of the Southern Swiss Alps, allowed quantitative reconstruction of Late Glacial and Early Holocene summer temperatures using a combined Swiss-Norwegian temperature inference model based on chironomid assemblages from 274 lakes. We reconstruct July air temperatures of ca. 10 A°C between 17 300 and 16 000 cal yr BP, a rather abrupt warming to ca. 12.0 A°C at ca. 16 500-16 000 cal yr BP, and a strong temperature increase at the transition to the BAlling/AllerAd interstadial with average temperatures of about 14 A°C. During the Younger Dryas and earliest Holocene similar temperatures are reconstructed as for the interstadial. The rather abrupt warming at 16 500-16 000 cal yr BP is consistent with sea-surface temperature as well as speleothem records, which indicate a warming after the end of Heinrich event 1 (sensu stricto) and before the BAlling/AllerAd interstadial in southern Europe and the Mediterranean Sea. Pollen records from Origlio and other sites in southern Switzerland and northern Italy indicate an early reforestation of the lowlands 2000-1500 yr prior to the large-scale afforestation of Central Europe at the onset of the BAlling/AllerAd period at ca. 14 700-14 600 cal yr BP. Our results suggest that these early afforestation processes in the formerly glaciated areas of northern Italy and southern Switzerland have been promoted by increasing temperatures. © Author(s) 2012. Source


Zijlstra G.,Laboratory of Palaeobotany and Palynology
Review of Palaeobotany and Palynology | Year: 2014

Authors who describe and publish new names of plants, who make new combinations (based on earlier names) and who publish replacement names, should do so in accordance with the rules. These rules can be found in the Code - since the International Botanical Congress in Melbourne in 2011, the Melbourne Code is in effect. The most important changes will be mentioned, with special attention to those rules that apply to what formerly were often indicated as 'fossil plants', now to be called 'plant fossils'. Besides changes in the rules, from now on, there is also an important change in the publication format of the Code: The rules are kept in one volume, and the continuously growing Appendices will constitute a separate volume. Besides an alteration to the name of the Code, there are two major changes in the rules: the acceptance of certain forms of electronic publication and the abandonment of the morphotaxon concept. Parallel to the latter alteration is a change for mycologists: the abolition of the provision for separate names for fungi with a pleomorphic life history.In Section 3, some further changes in and rearrangements of rules are discussed, preceded by a paragraph in which the basic concepts of the possible status of a name are presented: effectively published, validly published and legitimate. © 2014 Elsevier B.V. Source


Kustatscher E.,Naturmuseum Sudtirol | Van Konijnenburg-Van Cittert J.,Laboratory of Palaeobotany and Palynology | Van Konijnenburg-Van Cittert J.,Netherlands Center for Biodiversity Naturalis
Palaeontology | Year: 2010

Generally, lycophytes are not well represented in Anisian floras. Nonetheless, four different genera, each with one species, have been distinguished in the Anisian flora from Kühwiesenkopf (Monte Prà della Vacca), Italy. They were well preserved and yielded leaf cuticles in all four taxa and in situ spores in two of them. Lycopia dezanchei gen. et sp. nov. is the most common form; it is characterized by a dichotomising creeping prostrate rhizome (representing the primary shoot axis) from which arise aerial axes, apically bifurcated and covered with bundles of long leaves. This taxon cannot be attributed to any of the lycophyte orders, but most resembles Lycopodiales. Two representatives of the Isoetales have been found, of which Isoetites brandneri sp. nov. is abundant. This species is characterized by a short stem, which is unusual for this genus. In situ immature microspores and megaspores were found in some specimens. Lepacyclotes bechstaedtii sp. nov. has a quadrilobe corm with fertile scales inserted in whorls or slightly helicoidally. Short sterile leaves arise distally from the corm in some specimens. Selaginellales are very rare in the flora; Selaginellites leonardii sp. nov. is represented by a strobilus that yielded both micro- and megaspores. Some sterile fragments have been found associated, but never in organic connection. © The Palaeontological Association. Source


Kustatscher E.,Naturmuseum Sudtirol Museum of Nature South Tyrol | van Konijnenburg-van Cittert J.H.A.,Laboratory of Palaeobotany and Palynology | Roghi G.,CNR Institute of Neuroscience
Palaeogeography, Palaeoclimatology, Palaeoecology | Year: 2010

An important fossil flora has been collected in the middle-upper Pelsonian mainly marine locality at Kühwiesenkopf (NE-Dolomites, Italy). The fossil plants are briefly described and ecological reconstructions of coastal, lowland, river and upland plant assemblages were made. The composition of the rich and diversified macroflora indicates a typically warm and humid climate. The entire section was also subject of detailed palynological sampling for biostratigraphy and quantitative analyses. The palynological data confirm the macrofloral reconstructions and also suggest a warm and humid climate for this interval in the Dolomites (probably also on a more regional scale). Moreover, these results were subjected to two different palynological methods to obtain more detailed palaeoecological and palaeoclimatological data for the whole section. Palynological data suggest, that major oscillations observed in the middle part of the section are related to eustatic oscillations rather than to climatic changes. © 2009 Elsevier B.V. All rights reserved. Source


van konijnenburg-Van cittert J.H.A.,Netherlands Center for Biodiversity Naturalis | van konijnenburg-Van cittert J.H.A.,Laboratory of Palaeobotany and Palynology
Scripta Geologica | Year: 2010

An early Liassic male inflorescence of Stachyopitys preslii with in situ pollen is described from a clay lens in the sandpit Küfner near Pechgraben, Bavaria, Germany. These male inflorescences have been known since the 19 th century and are rather common in the early Liassic floras of Bavaria, but in situ pollen was hitherto unknown. Stachyopitys preslii is always found in association with the leaves and the female fructifications of Schmeissneria microstachys. The in situ pollen proved to be monosulcate, a pollen type commonly occurring in the Cycadophyta and Ginkgophyta. This strengthens the possible attribution of the parent plant of S. preslii (Schmeissneria microstachys) to the Ginkgoales. Source

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