Search results for "Alae"

Cooked and raw. Fruits and seeds in the Iberian Palaeolithic

2022

Fruits, seeds, leaves and underground storage organs were all consumed by human groups during the Palaeolithic. These plant foodstuffs provided humans with minerals, vitamins and nutrients essential for optimal health. In this sense, fire control was a crucial human achievement since cooking allowed the physical and chemical modification of these elements by eliminating toxins, enhancing the digestion of foodstuffs and increasing their energy value. The use of fire during plant processing increases the potential preservation of archaeobotanical remains, as well. Based on the preserved plant elements and their characteristics, the chaîne opératoire of plant consumption can be reconstructed. …

The genus Palaeolituonella (Foraminifer) and description of Palaeolituonella angulata nov. sp. from Upper Triassic reef limestones of the Tethys

2009

Taphonomical peculiarities and formation conditions of Baltic Devonian vertebrate fossil assemblages

2013

Devona mugurkaulnieku atrodņu tafonomiskais raksturojums un veidošanās apstākļi dienvidaustrumu Baltijā Pirmo reizi paleontoloģisko pētījumu vēsturē Baltijā ir veikta detalizēta Živetas, Franas un Famenas mugurkaulnieku atrodņu tafonomisko īpašību analīze, izmantojot mūsdienu metodiku. Savā starpā ir salīdzinātas vidējā un augšējā devona oriktocenozes Latvijas teritorijā, bet Baltijas (Galvenā devona lauka) fosiliju atrodnes ir salīdzinātas ar sakopojumiem Dienvidu Timanā. Ir secināts, ka, neskatoties uz tafonomisko pazīmju atšķirībām, Franas un Famenas klastiskās slāņkopas, kā arī vidus- un augšdevona mugurkaulnieku sakopojumu veidošanās mehānismi Baltijā ir bijuši visai līdzīgi. Ir noteik…

Does genetic population structure of Ambrosina bassii L. (Araceae, Ambrosineae) attest a post-Messinian land-bridge between Sicily and Africa?

2012

Abstract Aim of the present work is the analysis (through the study of enzyme polymorphism) of Sicilian and African (Tunisian) populations of Ambrosina bassii , a small perennial endemic to the Central-Western Mediterranean basin, in order to verify if the complex geological history of this part of the Mediterranean area left its mark in the present-day genetic structure of this taxon. Starch gel allozyme electrophoresis of seven putative loci of A. bassii was employed to estimate genetic diversity, genetic structure and gene flow. Populations from Sicily, Tunisia and Sardinia (as outgroup) were sampled. Results show that Sicily populations have 4 private alleles, Sardinia 3, Tunisia just o…

2007

The lack of obvious morphological differences between species impedes the identification of species in many groups of organisms. Meanwhile, DNA-based approaches are increasingly used to survey biological diversity. In this study we show that sequencing the mitochondrial protein-coding gene NADH dehydrogenase, subunit 1 (nd1) from 534 bats of the Western Palaearctic region corroborates the promise of DNA barcodes in two major respects. First, species described with classical taxonomic tools can be genetically identified with only a few exceptions. Second, substantial sequence divergence suggests an unexpected high number of undiscovered species.

STOP 2: Late-glacial and postglacial environmental changes, Lake Āraiši, Vidzeme Upland

2014

Structural trends and palaeogeography of the central and western Sicily Belt: new insights

1995

The geology of the Sicilian mainland is summarized by N–S geological sections. A continuous late Cenozoic orogenic belt through central and western Sicily resulted from a complex deformative history, recorded by several tectonic events. The deformation mainly involved the sedimentary cover of the old African continental margin, formed in a large basinal area, bordered at its southern margin by a shallow-water carbonate environment attached to Gondwana. The orogenic belt involves a complex architecture of thrust systems, of different size, geometry and palaeogeographical origin. Deformation, which mainly developed in the earlier stages of thrusting in the basinal rock assemblages, mainly gav…

Ecomorphological inferences in early vertebrates: reconstructing

2017

Our knowledge about the body morphology of many extinct early vertebrates is very limited, especially in regard to their post-thoracic region. The prompt disarticulation of the dermo-skeletal elements due to taphonomic processes and the lack of a well-ossified endoskeleton in a large number of groups hinder the preservation of complete specimens. Previous reconstructions of most early vertebrates known from partial remains have been wholly based on phylogenetically closely related taxa. However, body design of fishes is determined, to a large extent, by their swimming mode and feeding niche, making it possible to recognise different morphological traits that have evolved several times in no…

Arte paleolítico en Gorham's Cave (Gibraltar)

2009

En este trabajo presentamos las novedades sobre el arte paleolítico de la cueva de Gorham. En el apartado mobiliar, abordamos una aproximación multidisciplinar en la que se analizan los datos petrográficos, deposicionales, diagenéticos, tafonómicos y antrópicos (técnicos o iconográficos) identificados en dos plaquetas de arte mueble. El arte parietal de Gorham se amplía con las manifestaciones localizadas en una Galería ubicada al final del cavernamiento. En ambos casos, la procedencia estratigráfica o los rasgos estilísticos permiten su atribución al Magdaleniense.

Chemostratigraphy of the early Pliocene diatomite interval from MIS AND-1B core (Antarctica): Palaeoenvironment implications

2013

The AND-1B drill core (1285m-long) was recovered, inside the ANDRILL (ANtarctic geological DRILLing) Program, during the austral summer of 2006/07 from beneath the floating McMurdo Ice Shelf. Drilling recovered a stratigraphic succession of alternating diamictites, diatomites and volcaniclastic sediments spanning about the last 14Ma. A core portion between 350 and 480mbsf, including a 80m-thick diatomite interval recording the early Pliocene warming event, was investigated in term of opal biogenic content and element geochemistry. Across the diatomite interval, in spite of the lithological uniformity, a fluctuating biogenic opal profile mirrors the δ18O record, testifying a decrease in prod…