Lanser K.-P.,LWL Museum fur Naturkunde
Geologie und Palaeontologie in Westfalen | Year: 2010
Finds of elephant remains are described. An evaluation of the partly well preserved molar teeth showed that it was a representative of the southern elephants with predominantly archaic tooth characters. There are similarities with the tooth characters of Archidiskodon gromovi GARRUT & ALEXEEVA from the Khapry Sands, Sea of Azov in Russia. In comparison with published data on Archidiskodon meridionalis NESTI from the Arno Valley in Italy the present finds indicate an older age. This interpretation is supported by the results of palaeomagnetic studies which indicate a position in either the Olduvai or Reunion Event of the Matuyama Epoch, corresponding to age ranges of 1.77 to 1.95 and 2.14 to 2.19 million years respectively, and hence the Tiglian warm period at the end of the Pliocene. The elephant remains are associated with teeth of hippopotamus (Hippopotamus cf. antiquus), documenting an earlier record of hippopotamus in central Europe.
Lanser K.-P.,LWL Museum fur Naturkunde |
Heimhofer U.,Leibniz University of Hanover
Palaontologische Zeitschrift | Year: 2013
Theropod dinosaur teeth from a Lower Cretaceous karst filling in Devonian reef limestone (Massenkalk) located near the village of Balve on the northern margin of the Rhenish Massif, Germany, are described. Palynological evidence indicates that the karst filling took place during the Late Barremian to (Early) Aptian time interval. Palaeontological excavations carried out during several years at the Balve locality yielded remains of various animal groups, including sharks, amphibians, turtles, crocodiles, pterosaurs, herbivore dinosaurs, and, rarely, mammals. Of particular interest is an assemblage of different theropod dinosaur teeth, which has been characterized with the help of dental comparative morphometry. Based on these analyses, the teeth material from the Balve excavation can be assigned to five morphological groupings including dromaeosaurid and tyrannosauroid theropods. Morphological comparison of the theropod dinosaur teeth record with finds from other fossil localities in western and northwestern Europe of similar age shows clear similarities, but also some distinct differences. © 2013 Springer-Verlag Berlin Heidelberg.
Evidence of pterosaurs from a Lower Cretaceous period karst filling in northern Sauerland (Rhenish Massif, Germany) [Nachweise von Pterosauriern aus einer unterkreidezeitlichen Karstfüllung im nördlichen Sauerland (Rheinisches Schiefergebirge, Deutschland)]
Lanser K.P.,LWL Museum fur Naturkunde
Geologie und Palaeontologie in Westfalen | Year: 2015
This paper describes pterosaur teeth from a Lower Cretaceous karst filling in Devonian reef limestone (Massenkalk) located near the village of Balve on the northern margin of the Rhenish Massif, Germany. A palaeontological excavation over several years yielded remains of various animal groups, including sharks, amphibians, lizards, turtles, crocodiles, dinosaurs, including saurischians and ornithischians, and miscellaneous mammals. Of particular interest is an ensemble of pterosaur teeth, which has been compared to similar finds from other regions. Based on these analyses, the pterosaur teeth from the Balve excavation can be assigned to the group of ornithocheiroid Pterosaurs. A morphological comparison of the pterosaur teeth to finds from other fossil localities of similar age shows clear similarities, but also some differences.
Koch L.,Heinrich Heine Str. 5 |
Lemke U.,Bergstr. 25a |
Schollmann L.,LWL Museum fur Naturkunde
Geologie und Palaeontologie in Westfalen | Year: 2011
In this further paper on trilobites from the Ordovician of the Ebbe Anticline (Rhenish Massif, Germany) new finds of trilobites as well as hitherto unconsidered specimens are described and figured, and the first prove of a raphiophorid trilobite in the German Ordovician is recorded. Additionally a general survey of all Ordovician Ebbe localities is given especially of the Kiesbert locality, where the office for "Paläontologische Bodendenkmalpflege Westfalen-Lippe" carried out an excavation campaign. Recent microstratigraphical studies on chitinozoans led to a more exact subdivision of the Ordovician succession of the Herscheid group. The distribution of particular trilobite species is reflected in the palaeobiogeographical context.
Haug C.,University of Greifswald |
Roy P.V.,Yale University |
Roy P.V.,Ghent University |
Leipner A.,Museum am Scholerberg |
And 4 more authors.
Development Genes and Evolution | Year: 2012
Specimens of Euproops sp. (Xiphosura, Chelicerata) from the Carboniferous Piesberg quarry near Osnabrück, Germany, represent a relatively complete growth series of 10 stages. Based on this growth sequence,morphological changes throughout the ontogeny can be identified. The major change affects the shape of the epimera of the opisthosoma. In earlier stages, they appear very spine-like, whereas in later stages the bases of these spine-like structures become broader; the broadened bases are then successively drawn out distally. In the most mature stage known, the epimera are of trapezoidal shape and approach each other closely to form a complete flange around the thoracetron (0fused tergites of the opisthosoma). These ontogenetic changes question the taxonomic status of different species of Euproops, as the latter appear to correspond to different stages of the ontogenetic series reconstructed from the Piesberg specimens. This means that supposed separate species could, in fact, represent different growth stages of a single species. It could alternatively indicate that heterochrony (0evolutionary change of developmental timing) plays an important role in the evolution of Xiphosura. We propose a holomorph approach, i.e., reconstructing ontogenetic sequences for fossil and extant species as a sound basis for a taxonomic, phylogenetic, and evolutionary discussion of Xiphosura. © Springer-Verlag 2012.