Tanytrachelos ahynis (n.gen., n. sp.) is a lepidosaur from the Late Triassic Dan River Group (Newark Supergroup) of North Carolina and Virginia. The new reptile has gracile proportions similar to Tanystropheus (Middle Triassic) and is referred to the family Tanystropheidae of the suborder Prolacertiformes. Unlike Tanystropheus, Tanytrachelos has relatively short cervical vertebrae bearing splin...

Unspecified DOI: 10.1111/j.1751-8369.1990.tb00382.x Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: http://doi.org/10.5167/uzh-112675 Originally published at: Mørk, Atle; Vigran, Jorunn Os; Hochuli, Peter A (1990). Geology and palynology of the Triassic succession of Bjørnøya. Polar Research, 8(2):141-163. DOI: 10.1111/j.1751-8369.1990.tb00382.x Geology and paly...

Ichthyosaurs were important marine predators in the Early Jurassic, and an abundant and diverse component of Mesozoic marine ecosystems. Despite their ecological importance, however, the Early Jurassic species represent a reduced remnant of their former significance in the Triassic. Ichthyosaurs passed through an evolutionary bottleneck at, or close to, the Triassic-Jurassic boundary, which red...

Therocephalians were a speciose clade of nonmammalian therapsids whose ecological diversity and survivorship of the end-Permian mass extinction offer the potential to investigate the evolution of growth patterns across the clade and their underlying influences on post-extinction body size reductions, or 'Lilliput effects'. We present a phylogenetic survey of limb bone histology and growth patte...

Abstract Triassic strata in the Greater Barents Sea Basin are important records of geodynamic activity surrounding catchments and sediment transport Arctic basins. This study is first attempt to investigate evolution these source areas through time. Our analysis budgets from subsurface data application BQART approach estimate catchment properties shows that (1) during Lower Triassic, supply was...

Abstract Study of the Mesozoic succession Franz Josef Land (FJL) has shed new insights on stratigraphy and geological history neighboring portion Arctic. Based composition pebbles cobbles from Lower Jurassic conglomerates, we suggest that pre‐Mesozoic NE Barents Sea comprises Cambrian metasandstones intruded by Late Paleozoic granites overlain Carboniferous–Permian sedimentary deposits. U‐Pb ZH...

A new genus and species of pycnodontiform fishes, Grimmenodon aureum, from marginal marine, marine-brackish lower Toarcian (Harpoceras exaratum ammonite subzone) clay deposits of Grimmen in northeastern Germany is described. The single specimen represents a diagnostic left prearticular dentition characterized by unique tooth arrangement and ornamentation patterns. Grimmenodon aureum, gen. et sp...