6 Works

Data from: Decoupling of taxonomic diversity and morphological disparity during decline of the Cambrian trilobite family Pterocephaliidae

Melanie J. Hopkins
Though discordance between taxonomic diversity and morphological disparity is common, little is known about the underlying dynamics that drive this decoupling. Early in the history of the Cambrian trilobite family Pterocephaliidae, there was an increase in taxonomic diversity and morphological diversity. As taxonomic diversity declined in the later history of the clade, range of variation stayed high, and disparity continued to increase. However, per-branch rates of morphological evolution estimated from a recent phylogeny decreased with...

Data from: The early evolution of synapsids, and the influence of sampling on their fossil record

Neil Brocklehurst, Christian F. Kammerer & Jörg Fröbisch
Synapsids dominated the terrestrial realm between the late Pennsylvanian and the Triassic. Their early evolution includes some of the first amniotes to evolve large size, herbivory, and macro-predators. However, little research has focused on the changes in diversity occurring during this early phase in their evolutionary history, with more effort concentrating on later events such the Permo-Triassic extinction. Here we assess synapsid diversity, at both the species and genus levels, between the Carboniferous (Moscovian) and...

Data from: A juvenile turtle (Testudines, Eucryptodira) from the Upper Jurassic of the Langenberg Quarry, Oker, Northern Germany

Maren Jansen & Nicole Klein
Turtles are frequently found in fluviatile to lagoonal and shallow marine sediments in the Upper Jurassic of Western Europe. These turtles usually show a mixture of basal and derived characters, but phylogenetic relationships are still largely unresolved. This is mainly due to the incompleteness of fossils and the lack of taxonomically unambiguous characters and is also related to the presence of different ontogenetic stages, which are not easy to compare. The morphological description of a...

Data from: A morphometric and genetic framework for the genus Gazella de Blainville, 1816 (Ruminantia: Bovidae) with special focus on Arabian and Levantine mountain gazelles

Eva V. Bärmann, Torsten Wronski, Hannes Lerp, Beatriz Azanza, Saskia Börner, Dirk Erpenbeck, Gertrud E. Rössner & Gert Wörheide
Gazella is one of the most species-rich genera within horned ruminants. Despite overall similarity in body size and morphology, gazelles show variability in coloration and horn morphology. Unfortunately, however, species differentiation based on these characters, or on discrete skull characters, is very difficult due to high intraspecific variability. Furthermore, most species have fragmented and allopatric distributions, so that species boundaries were hard to define in the past. Mitochondrial DNA sequences have proven useful for investigating...

Data from: Diversity and palaeoecology of the enigmatic genus Knebelia (Eucrustacea, Decapoda, Eryonidae) from Upper Jurassic plattenkalks in southern Germany

Denis Audo, Günter Schweigert, Joachim T. Haug, Carolin Haug, Jean-Paul Saint Martin & Sylvain Charbonnier
For a long time, the genus Knebelia Van Straelen, 1922 has comprised two species of eryonid lobster, K. bilobata (Münster, 1839) and K. schuberti (Meyer, 1836), both recorded exclusively from Late Jurassic Lagerstätten in southern Germany. Recently, the latter has been suggested to represent a juvenile individual of Cycleryon propinquus (Schlotheim, 1822). A re-examination of the type and new material has led to our rejection of that interpretation and confirmation of assignment of this species...

Data from: Integration of molecules and new fossils supports a Triassic origin for Lepidosauria (lizards, snakes, and tuatara)

Marc E. H. Jones, Cajsa Lisa Anderson, Christy A. Hipsley, Johannes Müller, Susan E. Evans & Rainer R. Schoch
Background: Lepidosauria (lizards, snakes, tuatara) is a globally distributed and ecologically important group of over 9,000 reptile species. The earliest fossil records are currently restricted to the Late Triassic and often dated to 227 million years ago (Mya). As these early records include taxa that are relatively derived in their morphology (e.g. Brachyrhinodon), an earlier unknown history of Lepidosauria is implied. However, molecular age estimates for Lepidosauria have been problematic; dates for the most recent...

Registration Year

  • 2013
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Affiliations

  • Museum für Naturkunde
    6
  • University of Greifswald
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  • University of Cambridge
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  • University of Gothenburg
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  • French National Centre for Scientific Research
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  • University College London
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  • Bayerische Staatssammlung für Paläontologie und Geologie
    1
  • Goethe University Frankfurt
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  • Ludwig Maximilian University of Munich
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  • Staatliches Museum für Naturkunde Stuttgart
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