4,625 research outputs found
“Fossil Art”: The importance and value of the palaeobiodiversity in the Naturtejo Global Geopark, under UNESCO (Portugal)
No full textThe Geopark Naturtejo da Meseta Meridional (Centre Iberian Zone, Portugal) is developing the inventory of geological and mining heritage since 2004. This inventory in a concluding stage shows 18 fossil geosites, including classical and newly discovered sites evidencing international to regional importance. Some of the oldest fossils of the Iberian Peninsula were found at Naturtejo Geopark, corresponding to Middle - Late Ediacaran marine cyanobacteria found in a turbidite sequence cropping out at Erges River valley, near Salvaterra do Extremo locality. Most of the inventoried fossil sites belong to the Armorican Quartzite Formation, which is a peri-Gondwanan distributed biofacies famous for its trace fossils, such as the classic Skolithos (in piperock ichnofabrics) and the Cruziana rugosa group, as well as for obolid brachiopod shell beds, but lacking almost any other body fossils. The Penha Garcia Ichnological Park, a popular attraction of Naturtejo Geopark, is becoming internationally recognized for the unusual abundance and preservation of such trace fossils, with remark for the diverse feeding patterns made during the life cycle of giant trilobites. The remaining Ordovician period is well represented by fossil sites with calymenid, illaenid, dalmanitid, trinucleid and pliomerid trilobites, bivalves, orthoceratid cephalopods, orthid brachiopods, didymograptid graptolites, diploporitid echinoderms and ostracod arthropods. Fossils from Lower Silurian age (Llandovery) were found recently and for the first time in Naturtejo Geopark. Graptolites, cephalopods, bivalves and possible remains of eurypterids are among the first fossils identified. In the continental Cenozoic deposits, the fluvial terrace of Pinhal records the first incision of the Tejo River on the Neoproterozoic-to-Lower Palaeozoic and Palaeogene-Neogene rocks of Naturtejo Geopark during lower Pleistocene. In these conglomerates, at least 7 fossil tree trunks were found, due to the erosion by the Tejo river of Middle - Late Miocene aged arkoses and their deposition in flooding plain environment. The fossil trees were found by the Romans almost two thousand years ago during exploitation of the fluvial conglomerates for gold. The most recent fossil site was dated to 33500 years and corresponds to sandstones from the last fluvial terrace developed by the Tejo River. Foz do Enxarrique fossil site provided remains of large mammals such as red deer and auroch. But the most important finding was the remains of Elephas antiquus, corresponding to the latest record of this important elephant before its final extinction from Europe mainland. Fossil sites and palaeontological data achieved from active ongoing research at Naturtejo Global Geopark are being included in several tourism packages and educational programmes proposed by Naturtejo for national and international tour operators and schools. Cruziana trace fossils and trilobites that produced them have become the geobrand for nature tourism and landscape touring, not only for the Geopark area but also for the whole Portuguese Centre Region. Actually, they are already being used in innovative business opportunities
Representing Roomates' Preferences with Symmetric Utilities
No full textIn the context of the stable roommates problem, it is shown that acyclicity of preferences is equivalent to the existence of symmetric utility functions, i.e. the utility of agent i when matched with j is the same as j 's utility when matched with i .
In a galaxy far, far away... traces? : astrobiological potential of ichnology
No full textOrganism-substrate interactions and their products – individual traces and ichnofabrics – are important biosignatures on Earth as they represent direct evidence of biological behaviour. Nevertheless, ichnology received relatively little attention as a tool for searching life beyond Earth, and iconic traces such as burrows, footprints and coprolites have widely been ignored in the field of astrobiology, with few exceptions (microbially induced sedimentary structures, microborings). In the context of astrobiology, traces are characterized by the following characteristics:
1) Trace fossils preserve the activity of soft-bodied organisms;
2) Biogenic structures are resilient to processes that obliterate other
biosignatures (e.g. mechanical and chemical degradation, diagenesis,
tectonism, metamorphism);
3) Traces are very visible biosignatures;
4) Traces indicate environment and behaviour;
5) Traces are evidences of behaviour, therefore they can indicate life independently from morphology, size and biochemistry of tracemakers. These properties make ichnology a promising tool for the search for present and past life beyond Earth.
This work has been supported by the ROSAE project
Prospecção de marcadores químicos relacionados ao Amarelecimento Fatal em folhas de Elaeis guineensis utilizando abordagem metabolômica.
No full textDissertação (Mestrado em Química) - Instituto de Química, Universidade Federal de Goiás, Goiânia, GO.
Orientadora CNPAE: Patrícia Verardi Abdelnur
In a galaxy far, far away...traces? Astrobiological potential of Ichnology
No full textThe paper explores the relation between organisms and sediments looking for possible indications for exploring traces of life far far away
PRINCIPAIS espécies da flora apícola do nordeste.
No full textA Atividade apícola cresce anualmente em todo o Nordeste brasileiro. Como as abelhas alimentam-se basicamente do néctar e pólen das flores, para implantação de um projeto apícola , faz-se necessário avaliar a flora local e conhecer a capacidade de suporte da região. Equipe Técnica: Fábia de Mello Pereira, Maria Teresa do Rêgo Lopes, Ricardo Costa Rodrigues de Camargo, José Maria Vieira Neto
Taiophlebiidae Martins-Neto & Gallego & Brauckmann & Cruz 2007, fam. n.
No full textFamily Taiophlebiidae Martins-Neto, fam. n. <p> Type genus: <i>Taiophlebia</i> Martins-Neto, gen. n.</p> <p>Diagnosis: Fore wing with ScP and RA distally fused and RP multi-branched. RP origin at 1/5 of the wing base.</p> <p> Genus <b>Taiophlebia</b> Martins-Neto, gen. n.</p> <p> <i>Taiophlebia</i>: Martins-Neto <i>et al.</i>, 2004: 45.</p> <p> Etymology: From the type locality and <i>phlebia</i> = vein (latinized form of Greek <i>phleps</i>). Gender feminine.</p> <p> Type species: <i>T. niloriclasodae</i> Martins-Neto, sp. n., by present designation.</p> <p>Diagnosis: Fore wing with more than 100 mm long. Costal margin straight. Sc branching in ScA and ScP. ScP with at least two strong secondary branches. ScP/RA fused circa 1/ 4 of the wing apex. CuA most proximal branch reaches the anal margin after the wing midlength.</p> <p> Species included: The type species and <i>Taiophlebia ferreirai</i> (Pinto, 1994), comb. n.</p> <p> Remarks: <i>T. niloriclasodae</i> from the upper part of the Rio do Sul Formation at the Taió municipality, Santa Catarina, Brazil (Upper Carboniferous, Paraná Basin) is a key taxon for the understanding of the Ischnoneuroidea – Cacurgoidea complex. Particular characters of the venation such as the distal fusion of ScP and RA, and RP originating close to the basal fifth of the wing support a closer relationship to the representatives of the Ischnoneuroidea (Grylloblattida <i>sensu</i> Storozhenko), rather than to the Cacurgoidea (“ Paraplecoptera ” <i>s.l.</i> or Orthoptera). The Taiophlebiidae differ from the Proedischiidae as well as from their closest related families by the lack of the typical convergence of MP+CuA and thus represent the most basal group within the Ischnoneuroidea – Cacurgoidea complex.Another genus, <i>Cacurgulopsis</i> Pinto & Adami-Rodrigues, 1995 from Boituva, São Paulo (Paraná Basin, Upper Carboniferous) was originally included in the family Cacurgidae. However, in <i>Cacurgus</i> Handlirsch, 1911, the type genus of this family, ScP is not distally fused with the multibranched RA, originating in the basal third of the wing. <i>Cacurgulopsis</i> and <i>Taiophlebia</i> seem to be sister genera and are therefore included in the family Taiophlebiidae (Dutra <i>et al.</i> in press).</p>Published as part of <i>Martins-Neto, R. G., Gallego, O. F., Brauckmann, C. & Cruz, J. L., 2007, A review of the South American Palaeozoic entomofauna Part I: the Ischnoneuroidea and Cacurgoidea, with description of new taxa, pp. 87-101 in African Invertebrates 48 (1)</i> on page 96, DOI: <a href="http://zenodo.org/record/7667626">10.5281/zenodo.7667626</a>
FIGURE 6 in Leaf cuticle in Brazilian species of Cryptocarya (Lauraceae)
No full textFIGURE 6. Leaf cuticles and stomatal complex of Cryptocarya species. Cryptocarya velloziana. A–C. Braga s.n.; D–F. Lombardi 8950; G–I. Moraes 2621. Cryptocarya wiedensis. J–L. Kollmann 2464. Cryptocarya sp. M–O. Zamora 7597. A–B, D–E, G–H, J–K, M–N, adaxial and abaxial surfaces, respectively, by optical microscopy; C, F, I, L, O, stomatal complex by SEM. Scale bar = 50 μm (A, B, D, E, G, H, J, K, M, N); Scale bar = 15 μm (C, F, I, L, O).Published as part of Moraes, Pedro Luís Rodrigues De, Ribeiro, Henrique Lauand & Neto, Carlos Alberto Moysés, 2022, Leaf cuticle in Brazilian species of Cryptocarya (Lauraceae), pp. 112-140 in Phytotaxa 571 (2) on page 123, DOI: 10.11646/phytotaxa.571.2.2, http://zenodo.org/record/728420
FIGURE 1 in Leaf cuticle in Brazilian species of Cryptocarya (Lauraceae)
No full textFIGURE 1. Leaf cuticles and stomatal complex of Cryptocarya species. Cryptocarya aff. aschersoniana. A–C. Moraes 2243; D–F. Moraes 2403; G–I. Moraes 3242. Cryptocarya aschersoniana. J–L. Klein 3187; M–O. Moraes 5362. A–B, D–E, G–H, J–K, M–N, adaxial and abaxial surfaces, respectively, by optical microscopy; C, F, I, L, O, stomatal complex by SEM. Scale bar = 50 μm (A, B, D, E, G, H, J, K, M, N); Scale bar = 15 μm (C, F, I, L, O).Published as part of Moraes, Pedro Luís Rodrigues De, Ribeiro, Henrique Lauand & Neto, Carlos Alberto Moysés, 2022, Leaf cuticle in Brazilian species of Cryptocarya (Lauraceae), pp. 112-140 in Phytotaxa 571 (2) on page 118, DOI: 10.11646/phytotaxa.571.2.2, http://zenodo.org/record/728420
FIGURE 5 in Leaf cuticle in Brazilian species of Cryptocarya (Lauraceae)
No full textFIGURE 5. Leaf cuticles and stomatal complex of Cryptocarya species. Cryptocarya riedeliana. A–C. Kollmann 4413. Cryptocarya saligna. D–F. Magnago 1471; G–I. Moraes 3226. Cryptocarya sellowiana. J–L. Luz 196. Cryptocarya subcorymbosa. M–O. Moraes 5161. A–B, D–E, G–H, J–K, M–N, adaxial and abaxial surfaces, respectively, by optical microscopy; C, F, I, L, O, stomatal complex by SEM. Scale bar = 50 μm (A, B, D, E, G, H, J, K, M, N); Scale bar = 15 μm (C, F, I, L, O).Published as part of Moraes, Pedro Luís Rodrigues De, Ribeiro, Henrique Lauand & Neto, Carlos Alberto Moysés, 2022, Leaf cuticle in Brazilian species of Cryptocarya (Lauraceae), pp. 112-140 in Phytotaxa 571 (2) on page 122, DOI: 10.11646/phytotaxa.571.2.2, http://zenodo.org/record/728420
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