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Augsburg, Germany

Lopez-Arbarello A.,Ludwig Maximilians University of Munich | Stockar R.,Museo Cantonale di Storia Naturale | Burgin T.,Naturmuseum
PLoS ONE | Year: 2014

The lagerstätten in the Monte San Giorgio have provided excellent fossils representing one of the most important windows to the marine life during the Triassic. Among these fossils, fishes are abundant and extraordinarily well preserved. Most of these fishes represent extinct lineages and were difficult to understand and classify during the early years after discovery. These difficulties usually led to a mixture of species under the same taxonomic name. This is the case of fishes referred to the genus Archaeosemionotus. The name bearing type of A. connectens, the type species of this genus, represents a basal halecomorph, but most other fishes referred to this genus represent basal ginglymodians. Therefore, we conducted this study to clarify the taxonomic status and phylogenetic relationships of A. connectens, which is a member of the family Furidae (Halecomorphi, Ionoscopiformes) representing the second cladistically supported evidence of ionoscopiforms in the Triassic and it is thus one of the two oldest reliable records of this group. Ionoscopiforms have a long stratigraphic range, though their fossil record is rather patchy. In our analysis, the sister taxon of Archaeosemionotus is Robustichthys from the Anisian of China, and they together form a clade with Furo, which is known from several localities ranging from the Early to the Late Jurassic. Other ionoscopiforms are so far known from the Kimmeridgian to the Albian and it is thus evident that recent efforts have concentrated on the later history of the group (Late Jurassic to Cretaceous). The phylogenetic relationships obtained for the Ionoscopiformes do not show a clear palaeobiogeographic pattern, but give important new insights into the origin, divergence date and early history of this clade. © 2014 López-Arbarello et al. Source


Klietmann J.,University of Vienna | Nagel D.,University of Vienna | Rummel M.,Naturmuseum | van den Hoek Ostende L.W.,Naturalis
Paläontologische Zeitschrift | Year: 2014

In the Miocene, the talpid diversity was much higher than today. Especially the semifossorial and ambulatory moles were farther distributed and more common. Here, the talpids from the Bavarian fissure filling Petersbuch 28 (Early Miocene, MN 3) are described. The uropsiline Desmanella engesseri Ziegler, 1985 is the most frequent species, followed by Myxomygalehutchisoni (Ziegler, 1985), an urotrichine less specialized towards burrowing. The fossorial talpids Talpa sp. and Proscapanusintercedens Ziegler, 1985 are represented by humeri, P. intercedens by a few teeth. Some teeth could not be determined to species level. Among the rich postcranial material, the humerus of Desmanella engesseri was found for the first time. Compared to other Miocene localities, Petersbuch 28 is unique in the dominance of only superficially burrowing and semifossorial talpids. In the time from MN 2 to MN 7 + 8 (Early to Middle Miocene), the fossorial talpids were less dominant during MN 2 and most of MN 3, became more frequent during MN 4 and were predominant from MN 5 onward. © 2014 Springer-Verlag Berlin Heidelberg. Source


Klietmann J.,University of Vienna | Nagel D.,University of Vienna | Rummel M.,Naturmuseum | Van Den Hoek Ostende L.W.,Naturalis
Palaeobiodiversity and Palaeoenvironments | Year: 2014

The Bavarian fissure filling Petersbuch 28 (Lower Miocene, MN 3/4) yielded a large assemblage of the dimylid Plesiodimylus aff. chantrei. This assemblage includes molars of three incompletely differentiated morphotypes, resembling Plesiodimylus huerzeleri, P. chantrei and P. bavaricus, respectively. This pattern is interpreted as due to ecological reasons and a small time averaging. The lower molars do not show such differentiation. Next to Plesiodimylus, Chainodus intercedens was found, but in far smaller numbers. © 2014 Senckenberg Gesellschaft für Naturforschung and Springer-Verlag Berlin Heidelberg. Source


Klietmann J.,University of Vienna | Nagel D.,University of Vienna | Rummel M.,Naturmuseum | Van Den Hoek Ostende L.W.,Hoek Ostende
Bulletin of Geosciences | Year: 2014

The only marsupial and the Erinaceidae from the Bavarian fissure filling Petersbuch 28 are described. The marsupial is Amphiperatherium frequens erkertshofense, the Erinaceidae are represented by Galerix aurelianensis and an unknown large galericine, which is present only by four isolated teeth. The three species are mostly present by single teeth; distal ends of humeri of Amphiperatherium and Galerix, astragali of Galerix as well as calcanei of Amphiperatherium are also described; the calcaneus for the first time from material which was not in situ. Source


Klietmann J.,University of Vienna | Nagel D.,University of Vienna | Rummel M.,Naturmuseum | van den Hoek Ostende L.W.,Naturalis
Comptes Rendus - Palevol | Year: 2014

The Bavarian fissure filling Petersbuch 28 (Germany, Lower Miocene, MN 3/4) yielded a diverse assemblage of shrews. Soricella discrepans Doben-Florin, 1964 and Paenelimnoecus micromorphus (Doben-Florin, 1964) show bimodal size distributions in some dental elements, which is interpreted as the result of a small time averaging. Two upper incisor types of Miosorex desnoyersianus (Lartet, 1851) were found, also indicating two populations of slightly different times. Apart from these, the fissure yielded Heterosorex neumayrianus (Schlosser, 1887), the only heterosoricid present, Lartetium petersbuchense Ziegler, 1989, L.cf. prevostianum (Lartet, 1851) and Florinia stehlini (Doben-Florin, 1964). The shrews confirm that Petersbuch 28 represents a time period near the MN 3/MN 4 transition. Thus, it fills the gap between the classical localities of Wintershof-West and Petersbuch 2. The two species of Lartetium Ziegler, 1989 are possible immigrants. © 2013 Académie des sciences. Source

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