Taxonomic revision of the Late Devonian tetrapod Ichthyostega from East Greenland
نویسندگان
چکیده
منابع مشابه
A revision of tetrapod footprints from the late Carboniferous of the West Midlands, UK
A series of sandstone slabs from Hamstead, Birmingham (West Midlands, UK), preserve an assemblage of tetrapod trackways and individual tracks from the Enville Member of the Salop Formation (late Carboniferous: late Moscovian-Kasimovian). This material has received limited previous study, despite being one of the few British sites to preserve Carboniferous tetrapod footprints. Here, we restudy a...
متن کاملSVPCA TALKS A Devonian tetrapod-like fish from China reveals parallelism in stem tetrapod evolution
The fossils assigned to the tetrapod stem group document the evolution of terrestrial vertebrates from lobe-finned fishes. During the past 15 years the phylogenetic structure of this stem group has remained remarkably stable, even when accommodating major new discoveries such as the elpistostegid Tiktaalik. Here we present a large tetrapodomorph fish from the Late Devonian of China that disrupt...
متن کاملWoodland Hypothesis for Devonian Tetrapod Evolution
The rarity of Devonian tetrapods and the absence of tetrapods during the first 14 million years of the Mississippian (Romer’s Gap) have inspired hypotheses of fish-tetrapod evolutionary transition as an escape from difficult habitats such as deserts or stagnant waters. These hypotheses and Romer’s Gap are tested here using depth to calcic horizon in paleosols of the northern Appalachians as a p...
متن کاملLATE DEVONIAN INDEX BRACHIOPODA OF NORTH-EAST ESFAHAN IN CORRELATION WITH OTHER REGIONS
Abundance and multilateral extension of prominent genus and species of Brachiopoda in the majority of sedimentation series of the Late Devonian have been observed in all parts of Iran. The variability and rapid change in this respect has made it possible to delineate different lines of orthogenetism, biozonation and present biostratigraphical models at the sub-stage level. These characteristics...
متن کاملTAXONOMIC REVISION OF THE CYPERUS SUBGENUS CYPERUS IN IRAN
The genus Cyperus belongs to tribe Cypereae, subfamily Cyperoideae and family Cyperaceae that is the largest genus in this family after Carex. The classification of genus Cyperus is still unsettled because of morphological variations and therefore, makes determination of subgenera boundaries and species difficult. In Flora Iranica (KUKKONEN 1998) this genus was divided to six subgenera. In this...
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ژورنال
عنوان ژورنال: Palaeontology
سال: 2005
ISSN: 0031-0239,1475-4983
DOI: 10.1111/j.1475-4983.2004.00435.x