Dinosaur skeletal remains are almost unknown from northern South America. One of the few exceptions comes from a small outcrop in the northernmost extension of the Andes, along the western border of Venezuela, where strata of the La Quinta Formation have yielded the ornithischian Laquintasaura venezuelae and other dinosaur remains. Here, we report isolated bones (ischium and tibia) of a small n...

We describe a new and unusual vertebrate trackway from the Middle Jurassic Scalby Formation of Cleveland Basin, Yorkshire, United Kingdom. The Enigmatic Burniston Trackway (EBT) is first an...

in order to determine the dalichai formation paleoecology (middle jurassic), with measured thicknesses of 255 m at bar section, nw neyshabour, 28 samples systematically were collected. based on 112 palynological slides studies, 29 species of spore and pollen, which belong to 21 genera, have been identified. in addition to spores and pollens, dinoflagellate and fungus bodies form the palynomorph...

Unknown fossil collections from the Bakony Mts, collected by J. Nosky Jnr. during his mapping activity in 1940s and 1950s were found storage facility of Hungarian Geological Institute 2010s. In these materials Upper Bajocian (Middle Jurassic) Som-hegy Bakonybél (formerly known as part Pénzeskút) some specimens determined 1959 ‘Canaliphylloceras’ nov. gen. sp.’ However, never published faunal st...

Parasite-host associations among insects and mammals or birds are well attended by neontological studies [1]. An Eocene bird louse compression fossil [2, 3] and several flea specimens from Eocene and Oligocene ambers [4-8], reported to date, are exceptionally similar to living louse and flea taxa. But the origin, morphology, and early evolution of parasites and their associations with hosts are...

The last several years have seen the discovery of many new theropod dinosaur taxa. Data obtained from these and from fragmentary forms not previously utilized in cladistic analyses are examined. An analysis of forty one primary ingroup taxa and 386 characters yielded a set of most parsimonious cladograms which preserves many previously discovered relationships (e.g., a basal split between Cerat...

In an attempt to reconstruct the paleoenvironments of deposition for the Middle Jurassic Baghamshah formation, samples collected from six outcrop sections along the Shotori swell were subjected to detailed geochemical analyses. Bulk geochemical and biological marker data indicate a logical trend of the variation of organic input, salinity, and oxicity within Baghamshah paleoenvironments across ...