Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2017-10-18T19:54:20Z No. of bitstreams: 1 200448.pdf: 9734009 bytes, checksum: 65dfd2cb6e2c64d1e82c29c2a3d06c10 (MD5) / Made available in DSpace on 2017-10-18T19:54:20Z (GMT). No. of bitstreams: 1 200448.pdf: 9734009 bytes, checksum: 65dfd2cb6e2c64d1e82c29c2a3d06c10 (MD5) Previous issue date: 1984-08-23 / Estuda a anatomia de Laevapex diaphanus (Haldeman, 1841) comparando-a com Laevapex fuscus (Adams, 1841). L. diaphanus distingue-se de L. fuscus por possuir dente raquidiano com mesocones assimétricos, a vesícula seminal, a próstata e o ovoteste são menores, a pigmentação do manto é menos pronunciada. Laevapex distingue-se claramente dos gêneros sul-americanos por possuir eixo mediano de pigmentação tentacular, complexo peniano sem flagelo, com ultra-pênis desenvolvido e pênis de poro lateral. As interrelações com esses gêneros são discutidas. Pela primeira vez Laevapex é citado para o Brasil. / This study deals mainly with the anatomy fo Laevapex diaphanus (Haldeman, 1841), in comparison with Laevapex fuscus (Adams, 1841). L. diaphanus maybe distinguished from L. fuscus by the asmymmetric central tooth in the radula, smaller seminal vesicle, prostate and ovotestis , less pronounced mantle pigmentation The structure of the penial complex without flagellum, with a well-developed ultra-penis and lateral penis pore, and a conspicuous hollow core of black pigment in'the tentacles, distinguish Laevapex very clearly fron the south America genera. The interrelationships between Laevapex and these genera are discussed. The genus Laevapex is recorded for the first time in Brazil.

Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2018-02-08T00:02:46Z No. of bitstreams: 1 278119.pdf: 4340711 bytes, checksum: 557231932960aa262066716864bd39c6 (MD5) / Made available in DSpace on 2018-02-08T00:02:46Z (GMT). No. of bitstreams: 1 278119.pdf: 4340711 bytes, checksum: 557231932960aa262066716864bd39c6 (MD5) Previous issue date: 1998-03-02 / CAPES / São apresentados os estudos da concha, mandíbula, rádula, teto da câmara palial e sistema reprodutor, incluindo as caracterizações macro e microanatômicas do apêndice peniano, que possibilitaram a caracterização e distinção de Orthalicus pulchellus (Spix, 1827) das demais espécies conhecidas de Orthalicidae para o Brasil. O material examinado permitiu ampliar a distribuição geográfica da espécie, sendo apresentados como novas ocorrências os Estados: Ceará, Paraíba, Alagoas, Mato Grosso, Minas Gerais e Espírito Santo. Dados bibliográficos e observações em terrário permitiram verificar que o animal alimenta-se raspando fungos e líquens da superfície de pequenos troncos e galhos de vegetais de várias espécies. / Studies on shell, Jaw, radula, palial camera roof and reproductive system are presented, including macro and microanatomical characterizations of the penis appendix, what enabled the characterization and distinction of Orthalicus pulchellus (Spix, 1827) from the other known species of Orthalicidae for Brazil. The material examined allowed the enlargement of the geographical distribution of the species; Ceará, Paraíba, Alagoas, Mato Grosso, Minas Gerais and Espírito Santo. Bibliographical data and observations on terraria allowed us to examine that the animal feed itself scratching fungi and lichens from the surfaces of small trunks and branches of several plant species.

The Broad Caribbean region is defined as the Gulf of Mexico, and the coastal and marine areas of the Caribbean Sea, including the chain of islands forming the Greater and Lesser Antilles, Turks and Caicos, the Bahamas, and the gulf coasts of the United States, Central and South America (Stanley, 1995). The cephalopods of the Broad Caribbean were examined in terms of distribution, abundance, and ecological importance. A suite of 5190 preserved cephalopod specimens were identified and catalogued to produce regional maps of cephalopod distribution within the Broad Caribbean. Eighteen range extensions were noted for known species. Regional species richness was examined with respect to Rapoport's Rule with an eye toward possible cephalopod hotspots in the region. Cephalopods of the Broad Caribbean within the latitudinal bands of 8°N and 30°N do not support Rapoport's Rule as they exhibit increasing species richness with increasing latitude. Eight subareas were chosen to compare species richness. Regionally, species richness is patchy, with the largest concentration of cephalopods off the eastern Florida coast. Areas of the southern Caribbean Sea are in need of more samples for accurate assemblage counts and more meaningful comparisons with other Caribbean regions. Rarefaction curves were used to normalize the variously sized samples throughout the Broad Caribbean. A checklist of the Gulf of Mexico based on literature developed a picture for the northern regions of the Broad Caribbean. This checklist provided an updated account of cephalopod species that were reported from smaller literature works. Lastly, the first observation in the North Atlantic Ocean of the deep-sea squid Asperoteuthis acanthoderma (family Chiroteuthidae) was described. The description is based on two nearly intact, but damaged, specimens that were found floating at the surface in the waters off Key West and Marathon, Florida in 2007. All previously known records are recorded from a few specimens scattered in the western Pacific Ocean. There is a need for increased sampling throughout the Broad Caribbean to explore the systematics, life histories, distribution patterns, and potential fisheries for this group of organisms.

This thesis describes the vertical distribution, quality, and quantity of the fauna found at the bottom of Lake Worth in Texas.

Food preferences to five most widespread invasive plant species from river floodplains: Impatiens glandulifera, Helianthus tuberosus, Fallopia japonica, F. sachalinensis a F.x bohemica and one native species - U. dioica were studied on two common land snail species. Using three different methods I tried to recognize, whether or not these plants serve as a food source to Succinea putris and Urticicola umbrosus. From histological sectionsit was impossible to identify the plants. The majority of plants don`t provide structures usable for identification of plant in the snail maces. I was able to identify only H. tuberosus and U. dioica undoubtedly, thanks to trichomes. According to the results of laboratory tests, the most important factors for snails food preferences are plant species and the condition of plant material. U. umbrosus consumed much less fresh material than S. putris. Consumption of frozen leaves became larger for both species. The most preffered plant species were U. dioica and H. tuberosus. Only frozen I. glandulifera was consumed. Fallopia spp. were rejected both, fresh or frozen.

No description available.

<p>Small shelly fossils are common in sediments of Early Cambrian age and include the earliest common representatives of metazoan animals with mineralized hard parts. The group includes fossils of very different morphology, composition and ultrastructure. They seem to represent skeletal remains of numerous animal groups, the biological affinities of which are largely unresolved. However, the wide geographic range of many forms has the potential to enhance biostratigraphic and palaeogeographic resolution in the Early Cambrian. </p><p>The late Early Cambrian sequence of North-East Greenland has yielded an assemblage of more than 88 species of small shelly fossils, brachiopods and trilobites, indicative of a middle Dyeran age (Botoman equivalent). The recovered fossils include a number of species that are known from other Early Cambrian palaeocontinents, and particularly strong ties to late Early Cambrian faunas of Australia are documented. The many cosmopolitan taxa thus identified suggests a close juxtaposition of palaeocontinents at this time. </p><p>The systematic affinity of many of these small shelly fossils is poorly understood, partly because of their fragmentary nature and poor preservation. However, new data from North-East Greenland improves our understanding of the function and biological affinity of certain taxa. Collections of the problematic fossil <i>Mongolitubulus</i> from North and North-East Greenland exhibit characters indicative of a defensive function as spines of bivalved arthropods, while species of the problematic genus <i>Triplicatella</i> represent the opercula of an unknown tubular shell, probably related to orthothecid hyoliths. The bivalved fossil <i>Mickwitzia</i> from North-East Greenland combines characters of linguliform brachiopods and sclerites of <i>Micrina</i>, a non-bivalved problematic form (halkieriid) from Australia. The combination suggests that <i>Mickwitzia</i> is a stem group brachiopod and strengthens arguments for a halkieriid ancestry of the brachiopod phylum.</p>

Small shelly fossils are common in sediments of Early Cambrian age and include the earliest common representatives of metazoan animals with mineralized hard parts. The group includes fossils of very different morphology, composition and ultrastructure. They seem to represent skeletal remains of numerous animal groups, the biological affinities of which are largely unresolved. However, the wide geographic range of many forms has the potential to enhance biostratigraphic and palaeogeographic resolution in the Early Cambrian. The late Early Cambrian sequence of North-East Greenland has yielded an assemblage of more than 88 species of small shelly fossils, brachiopods and trilobites, indicative of a middle Dyeran age (Botoman equivalent). The recovered fossils include a number of species that are known from other Early Cambrian palaeocontinents, and particularly strong ties to late Early Cambrian faunas of Australia are documented. The many cosmopolitan taxa thus identified suggests a close juxtaposition of palaeocontinents at this time. The systematic affinity of many of these small shelly fossils is poorly understood, partly because of their fragmentary nature and poor preservation. However, new data from North-East Greenland improves our understanding of the function and biological affinity of certain taxa. Collections of the problematic fossil Mongolitubulus from North and North-East Greenland exhibit characters indicative of a defensive function as spines of bivalved arthropods, while species of the problematic genus Triplicatella represent the opercula of an unknown tubular shell, probably related to orthothecid hyoliths. The bivalved fossil Mickwitzia from North-East Greenland combines characters of linguliform brachiopods and sclerites of Micrina, a non-bivalved problematic form (halkieriid) from Australia. The combination suggests that Mickwitzia is a stem group brachiopod and strengthens arguments for a halkieriid ancestry of the brachiopod phylum.

No description available.

Orientador: Marcello Guimarães Simões / Resumo: A Formação Crato, Aptiano, é uma das principais unidades litoestratigráficas da sucessão sedimentar mesozoica da Bacia do Araripe, NE do Brasil. A unidade é reconhecida por conter um dos mais importantes depósitos do tipo Konservat-Lagerstätte do Gondwana. Tais depósitos são representados por calcários laminados contendo fósseis excepcionalmente bem preservados. Investigações estratigráficas e paleontológicas, combinadas com mapeamento detalhado da unidade na borda Leste da Bacia do Araripe, tornaram possível o reconhecimento de um importante intervalo contendo siltitos e argilitos ricos em fósseis de moluscos (gastrópodes, bivalves e restos vegetais incarbonizados), com ampla distribuição lateral. O intervalo, com 0,3-2,25 m de espessura, é representado por camadas tabulares de lamitos acinzentados, intensamente bioturbados e intercalados em folhelhos, arenitos finos e fácies heterolíticas. No presente estudo são descritas, pela primeira vez, as espécies de moluscos bivalves encontradas nesta camada e discutidas as suas implicações paleoambientais e paleobiogegráficas. Espécimes foram coletados em quatro localidades distintas (i.e., Três Irmãos, Batateira, Caldas e Estiva), e foram posteriormente submetidos à minuciosa análise de caracteres-chave (e.g., cicatrizes musculares, charneira e ornamentação). São descritos dois novos gêneros (Cratonaia gen. nov. e Araripenaia gen. nov.), pertencentes a Silesunionoidea Skawina e Dzik, 2011 e Trigonioidoidea Cox, 1952, respectivament... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The Aptian Crato Formation is one of the main litostratigraphic units of the Mesozoic sedimentary succession of the Araripe Basin, northeastern Brazil. This unit is widely known for containing one of the main Konservat-Lagerstätte deposits of the Gondwana. Such deposits are represented by laminated limestones enclosing exceptionally well-preserved fossils. Stratigraphic and paleontological investigations, combined with detailed mapping of the unit in the eastern border of the Araripe Basin, enabled the recognizing of a key interval encompassing shell-rich siltstones and claystones, with wide lateral distribution. The 0.3–2.25-m-thick interval is represented by tabular layers of intensely bioturbated grayish mudstones, intercalated in shales, fine sandstones and heterolithic facies. In this study, for the very first time, bivalve molluscs found within this layer are described, and their paleoenvironmental and paleobiogeographic implications are discussed. Specimens have been collected in four different locations (i.e., Três Irmãos, Batateira, Caldas and Estiva), and then submitted to careful analyses of key morphological characters (e.g., muscle scars, hinge and ornamentation). Two new genera are herein described (Cratonaia gen. nov. and Araripenaia gen. nov.), each one of them belonging to the superfamilies Silesunionoidea Skawina and Dzik, 2011 and Trigonioidoidea Cox, 1952, respectively. Both genera are monospecific and represented by the new species Cratonaia novaolindensi... (Complete abstract click electronic access below) / Mestre