Search

Made available in DSpace on 2021-06-25T11:01:44Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01. Added 1 bitstream(s) on 2021-07-15T14:35:59Z : No. of bitstreams: 1 S0001-37652021000401205.pdf: 5311061 bytes, checksum: 06ed2fd3ad73c02f667cd32b22587292 (MD5) A paleoparasitological analysis was carried out on a large coprolite assigned to a carnivoran mammal, recovered from the Municipality of Uruguaiana, in the western region of the State of Rio Grande do Sul, Brazil, where the Upper Pleistocene Touro Passo Formation crops out. For this, an individual sample was extracted from the specimen using an electric drill, dissociated with 10% hydrochloric acid solution, washed with distilled water, and sifted through a 500 mesh Tyler sieve. After laboratory processing, the sediment retained on the sieve was mixed with glycerin and examined by optical microscopy, which revealed the presence of 14 protozoan oocysts and three nematode eggs. The morphological characteristics of the oocysts (i.e., spherical shape, thick-walled, internal zygote apparently at the beginning of sporulation, as well as their size) and of the eggs (i.e., ovoidal shape, rounded ends, smooth surface, thin-shelled, embryo in their interior, along with their morphometry) suggest that these specimens belong respectively to the orders Eucoccidiorida and Strongylida (Family Ancylostomatidae) represented by several parasitic species of the alimentary tract of modern carnivore. This is the first record of paleoparasites discovered in a vertebrate host from the Touro Passo Formation. UNESP Núcleo de Evolução e Paleobiologia de Vertebrados Departamento de Geologia Aplicada Instituto de Geociências e Ciências Exatas, Campus Rio Claro, Av. 24 A, 1515 Instituto Adolfo Lutz Núcleo de Ciências Biomédicas CLR II, R. Rubens Arruda, Q6 Universidade Federal do Rio Grande do Sul Programa de Pós-Graduação em Geociências Instituto de Geociências UFRGS, Av. Bento Gonçalves, 9500 Universidade Federal do Rio Grande (FURG) Laboratório de Geologia e Paleontologia Instituto de Oceanografia, Av. Itália, Km 8 UNESP Núcleo de Evolução e Paleobiologia de Vertebrados Departamento de Geologia Aplicada Instituto de Geociências e Ciências Exatas, Campus Rio Claro, Av. 24 A, 1515

Made available in DSpace on 2019-10-06T16:49:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01. Added 1 bitstream(s) on 2019-10-09T18:35:38Z : No. of bitstreams: 1 S0001-37652019000400508.pdf: 2788820 bytes, checksum: 62cf24a2ab93abbe5b24a0dc6073b2e3 (MD5) This study presents the oldest record of Acanthocephala parasite eggs in coprolites preliminary assigned to Crocodyliformes, recovered in the region of Santo Anastácio Municipality, Southwestern São Paulo State. For this, a paleoparasitological investigation was carried out on 53 mineralized coprolites ( complete or fragmented), with round shape or cylindrical shape of rounded or pointed ends, 0.2 - 3.9 cm in length x 0.1 - 2.4 cm in diameter, 3.7 grams in weight, and absence of food remains. Individual samples of the surface and internal portions of each coprolite were extracted by electric drill, dissociated with Cloridic Acid 10% solution, washed with Distilled Water, and filtered in granulometric screen Mesh / Tyler 325. After laboratory processing, the sediments retained on the granulometric screen was studied with Glycerin under optical microscopy, and the presence of four Acanthocephala eggs could be observed in sample of only one of these ichnofossils. All specimens were well preserved and showed 72.5 - 85 µm in length x 27.5 - 50 µm in width, elliptical shape, three concentric and thick shells, and embryos in their interior. This study inaugurates investigations and knowledge about Paleoparasitology in Crocodyliformes coprolites from the Bauru Group, Upper Cretaceous from the Paraná Basin. Núcleo de Evolução e Paleobiologia de Vertebrados, Departamento de Geologia Aplicada, Instituto de Geociências e Ciências Exatas, UNESP, Campus Rio Claro. Av. 24 A, 1515, 13506-900 Rio Claro, SP, Brazil

Made available in DSpace on 2019-10-06T16:36:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-10-01 Two new ascaridoid species, Bauruascaris cretacicus n. gen. et n. sp., and Bauruascaris adamantinensis n. gen. et n. sp., are described based on the fossils of eggs preserved in 80–70 million year old phosphatized coprolites of Crocodyliformes, chronologically assigned to the Upper Cretaceous (Campanian/Maastrichtian age), collected from sedimentary rocks of the Bauru Group, Adamantina Formation in the municipality of Santo Anastácio, in the southwestern region of the state of São Paulo, Brazil, South America. This paper describes the oldest ascaridoid species ever recorded in Crocodylomorpha. Hence, this article contributes to the body of knowledge about the evolutionary history of this nematode group. It also offers a clue about the composition of the parasite fauna of these reptiles from the Late Cretaceous, which is still unknown despite numerous studies about various aspects of their biology and the pioneering paleoparasitological analysis of animal coprolites by South American researchers. Núcleo de Evolução e Paleobiologia de Vertebrados Departamento de Geologia Aplicada Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista UNESP, Campus Rio Claro, Avenida 24 A/1515, Jardim Bela Vista Núcleo de Evolução e Paleobiologia de Vertebrados Departamento de Geologia Aplicada Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista UNESP, Campus Rio Claro, Avenida 24 A/1515, Jardim Bela Vista

Made available in DSpace on 2018-12-11T16:46:58Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-07-03 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) A new ichnospecies, Brasilichnium anaiti, is erected on material from the Botucatu Formation of Brazil. The general morphology supports ichnotaxonomic similarity between the new ichnotaxon and Brasilichnium elusivum Leonardi, 1981, even if a separation at the ichnospecies level is evident, based on differences in shape and arrangement of pes digit marks along with a clear dimensional gap between both ichnotaxa. Similar forms from the Lower Jurassic of the United States are known and should be included under this new ichnotaxonomic label, based on shared morphological features. B. anaiti is constantly associated with B. elusivum in dune foresets of hyperarid paleoenvironments, to which these forms are restricted. This makes B. anaiti a further element of the Brasilichnium ichnocoenosis in the larger framework of the Chelichnus ichnofacies. Re–evaluation of possible trackmakers highlights the difficulties of unequivocal referring this ichnotaxon to a specific producer, but restrains potential trackmakers to early mammaliamorph therapsids. Department of Biology Faculty of Sciences and Letters of Ribeirão Preto Univeristy of São Paulo Center for Vertebrate Evolution and Paleobiology Department of Applied Geology Institute of Geosciences and Exact Sciences São Paulo State University (UNESP) Center for Vertebrate Evolution and Paleobiology Department of Applied Geology Institute of Geosciences and Exact Sciences São Paulo State University (UNESP) FAPESP: 2013/01930–1

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T18:51:48Z No. of bitstreams: 1 S0001-37652011000400006.pdf: 3392538 bytes, checksum: 3fe404a6c65cb6527e8c012cc85b0c4b (MD5) Made available in DSpace on 2013-08-22T18:51:48Z (GMT). No. of bitstreams: 1 S0001-37652011000400006.pdf: 3392538 bytes, checksum: 3fe404a6c65cb6527e8c012cc85b0c4b (MD5) Previous issue date: 2011-12-01 Made available in DSpace on 2013-09-30T19:42:50Z (GMT). No. of bitstreams: 2 S0001-37652011000400006.pdf: 3392538 bytes, checksum: 3fe404a6c65cb6527e8c012cc85b0c4b (MD5) S0001-37652011000400006.pdf.txt: 41953 bytes, checksum: e3255f994f783a78fa10f86417c60272 (MD5) Previous issue date: 2011-12-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T14:16:54Z No. of bitstreams: 2 S0001-37652011000400006.pdf: 3392538 bytes, checksum: 3fe404a6c65cb6527e8c012cc85b0c4b (MD5) S0001-37652011000400006.pdf.txt: 41953 bytes, checksum: e3255f994f783a78fa10f86417c60272 (MD5) Made available in DSpace on 2014-05-20T14:16:54Z (GMT). No. of bitstreams: 2 S0001-37652011000400006.pdf: 3392538 bytes, checksum: 3fe404a6c65cb6527e8c012cc85b0c4b (MD5) S0001-37652011000400006.pdf.txt: 41953 bytes, checksum: e3255f994f783a78fa10f86417c60272 (MD5) Previous issue date: 2011-12-01 Petrobras Universidade Estadual Paulista (UNESP) Universidade Federal do Maranhao (UFMA) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) A Formação Alcântara, uma importante unidade estratigráfica do início do Cenomaniano no Brasil, foi depositada sob condições transicionais (estuarinas), e o seu registro fóssil inclui restos fragmentários de vegetais, peixes, crocodilomorfos, pterossauros e dinossauros, com uma notável diversidade de placas dentárias de dipnoiformes. O material de dipnoiformes aqui reportado compreende um novo taxon, Equinoxiodus alcantarensis gen. et sp. nov. A maioria dos morfótipos de vertebrados continentais coletados na Formação Alcântara são similares a faunas cronocorrelatas do norte da África, mas este novo gênero de Dipnoiformes indica algum grau de isolamento paleogeográfico e endemismo, provavelmente causado pelo alargamento do Oceano Atlântico equatorial no início do Cenomaniano, que pode ter afetado, de forma seletiva, algumas espécies. The Alcântara Formation, an important stratigraphic unit from the early Cenomanian of Brazil, was deposited under transitional (estuarine) conditions, and its fossil record includes fragmentary remains of plants, fishes, crocodylomorphs, pterosaurs and dinosaurs, with a noteworthy diversity of dipnoiformes tooth plates. The dipnoiformes material reported here comprises a new taxon, Equinoxiodus alcantarensis, gen. et sp. nov. Most of the identified morphotypes of continental vertebrates collected in the Alcântara Formation are similar to chronocorrelative faunas from Northern Africa, but this new genus of Dipnoiformes indicates some degree of paleogeographic isolation and endemism. This was probably caused by the widening of the equatorial Atlantic Ocean during the early Cenomanian, which may have selectively affected some species. USP IGC GSA UEMA CECEN Universidade Federal do Maranhão Departamento de Biologia UNESP IGCE DGA UNESP IGCE DGA

A noteworthy diversity of Dipnoi tooth plates has been collected in the fossiliferous conglomerates of the Alcântara Formation, early Cenomanian (Cretaceous) of Brazil. This sequence was deposited under transitional (estuarine) conditions, gathering reworked dissociated fossils represented by plants, fishes, crocodylomorphs, pterosaurs and dinosaurs. A new species of Dipnoi is reported in this work, Equinoxiodus schultzei sp. nov. whose genus is endemic of northern South America and lived probably in fresh water. The presence of several species of dipnoan in the mid-Cretaceous of north/northeastern Brazil indicates that the environmental conditions were very suitable to this group, confirming the well-marked seasonality of the climate, with frequent prolonged droughts, as interpreted in previous publications.

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2014-02-26T17:23:56Z No. of bitstreams: 1 WOS000234128300004.pdf: 497489 bytes, checksum: b38725453b7d7f9d19699523a6c6f20f (MD5) Made available in DSpace on 2014-02-26T17:23:56Z (GMT). No. of bitstreams: 1 WOS000234128300004.pdf: 497489 bytes, checksum: b38725453b7d7f9d19699523a6c6f20f (MD5) Previous issue date: 2006-01-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T15:23:09Z No. of bitstreams: 1 WOS000234128300004.pdf: 497489 bytes, checksum: b38725453b7d7f9d19699523a6c6f20f (MD5) Made available in DSpace on 2014-05-20T15:23:09Z (GMT). No. of bitstreams: 1 WOS000234128300004.pdf: 497489 bytes, checksum: b38725453b7d7f9d19699523a6c6f20f (MD5) Previous issue date: 2006-01-01 Material from a new titanosaur from the Bauru Basin (Bauru Group), Brazil is described and compared with well-known titanosaurs. Adamantisaurus mezzalirai gen. et sp. nov. is based on six articulated anterior caudal vertebrae and two haemapophyses collected from the Adamantina Formation, which is considered to be Campanian-Maastrichtian? in age. Adamantisaurus mezzalirai is characterized by the following combination of characteristics: anterior caudal vertebrae with straight or slightly backwardly-projecting neural spines with strongly expanded distal ends, stout prespinal lamina, very wide pre- and postzygapophyseal articular facets, and concave postzygapophyseal articular facets on anterior caudal vertebrae. Although our cladistic analysis has produced equivocal results, Adamantisaurus mezzalirai shares with DGM 'Series B' (Peiropolis titanosaur) and Aeolosaurus the presence of postzygapophyses with concave articular facets, and shares with DGM 'Series B' the presence of laterally expanded neural spines and stout prespinal lamina. Additionally, A. mezzalirai shares with DGM 'Series' C (other titanosaur from Peiropolis) the presence of short neural spines. São Paulo State Univ, UNESP, IGCE, BR-13506900 Rio Claro, Brazil São Paulo State Univ, UNESP, IGCE, BR-13506900 Rio Claro, Brazil