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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Revisão sistemática dos Enchodontidae (Euteleostei : Aulopiformes) do Brasil

Coelho, Pablo Menezes January 2004 (has links)
Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2017-10-18T22:26:54Z No. of bitstreams: 1 641031.pdf: 3106115 bytes, checksum: d1ecfab67ced738829b8942a7d9c92f1 (MD5) / Made available in DSpace on 2017-10-18T22:26:54Z (GMT). No. of bitstreams: 1 641031.pdf: 3106115 bytes, checksum: d1ecfab67ced738829b8942a7d9c92f1 (MD5) Previous issue date: 2004 / CAPES / FAPERJ / Os peixes da família Enchodontidae Lydekker, 1889 apresentam um corpo fusiforme, maxilas robustas, dentes longos e tipicamente caniniformes e a presença de um grande dente palatino. Estas características provavelmente conferiam aos representantes deste táxon a capacidade de predação ativa, utilizando os dentes para captura de presas. Estes peixes são tidos como estritamente marinhos, sendo encontrados em depósitos sedimentares do Cretáceo Superior localizados no norte da África, sul da Europa, oeste da Ásia, sudoeste da América do Norte, nordeste e sul do Brasil. No sul do Brasil, esta família foi encontrada na Bacia de Pelotas, Formação Atlântida, sendo representada por Rharbichthys cf. ferox e Enchodus cf. venator. Para o nordeste brasileiro, havia relatos prévios sobre a ocorrência nas bacias sedimentares de Pernambuco-Paraíba e Sergipe-Alagoas. Para a primeira bacia, foram descritos os seguintes táxons: Enchodus libycus (Quaas, 1902), E. oliveirai Maury, 1930 e E. subaequilateralis Cope, 1886; para a segunda, os seguintes: E. longipectoralis (Schaeffer, 1947) e Enchodus libycus (Quaas, 1902). Na presente dissertação, todo o material atribuído à Enchodontidae foi revisto, tendo sido acrescentadas novas informações. Além disso, estão sendo apresentadas duas novas espécies desta família para a Bacia de Sergipe Alagoas. Estas foram comparadas com espécies mais completas de outras localidades, onde foram verificadas semelhanças, podendo-se afirmar pertencer ao gênero Enchodus, mas observando-se algumas diferenças, suficientes para separar-lhes em outras duas espécies. / The members of the family Enchodontidae Lydekker, 1889 show a fusiform body, strong jaws, elongate and typically caniniform teeth, and large palatine tooth. These features probably give them an active predation capacity, using those teeth to catch their preys. Enchodontid fishes are considered as inhabiting marine strict paleoenvironment, being commonly found in sedimentary deposits of the Upper Cretaceous from north Africa, south Europe, western Asia, southwestern North America, northeastern and south Brazil. In south Brazil, this family was recorded in the Atlântida Formation, Turonian of the Pelotas Basin, being recognized Rharbichthys cf. ferox and Enchodus cf. venator. Regarding Brazilian northeastern, previous records were pointed out to the Pernambuco-Paraíba and Sergipe-Alagoas basins. In the first basin, three taxa were described, as follow: E. subaequilateralis Cope, 1886, Enchodus libycus (Quaas, 1902), and E. oliveirai Maury, 1930. In the second one, E. longipectoralis (Schaeffer, 1947) and Enchodus libycus (Quaas, 1902) were described. In the present dissertation, ali material previously ascribed to the Enchodontidae was reviewed and new data were added. In addition, two new species of this family were identified in the Early Cretaceous of the SergipeAlagoas Basin. These forms were compared with severa I other enchodontid species, represented by more complete specimens from several localities. Several similarities were verified among them, suggesting that the species from the Sergipe-Alagoas Basin can be assigned to the genus Enchodus. On the other hand, these new species have some differences that allow to separate from ali known enchodontids.

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