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Previous issue date: 2010-04-09 / CAPES / The genus Ctenomys Blainville, 1826 has a systematic and complex although there are morphological and molecular studies on the genus, it is still difficult to identify and classify these individuals who have a high diversity of karyotypes with diploid numbers ranging from 2n = 10 to 2n = 70. However, some authors confirm the usefulness of taxonomic structures such as penis and baculum in the systematic study of rodents. The penis, as well as the baculum (penis bone), has been the subject of several studies because of its great morphological diversity. This work is based on the study of external morphology of the glans penes and baculum of Ctenomys minutus, Ctenomys flamarioni and Ctenomys torquatus to identify possible variations and compare the differences. The study was done from the penis of adult set of the species listed above. Photographs were taken, dissections, drawings with a camera lucida and diaphanization the penis. For analysis of the microstructure of the surface of the glans penes was used the technique of scanning electron microscopy (SEM). The results showed great differences in morphological structure of the baculum of the three species analyzed and showed structures similar to thorns that covered the entire surface of the glans penes with varying distribution over the glans. Our results indicate that the baculum may be an excellent marker complex taxonomic groups such as the Ctenomys. Morphological studies of the surface of the glans penes and baculum combined with genetic studies, molecular and biogeographical can provide important information to better understand the systematic, evolution and taxonomy of the genus. / O g?nero Ctenomys Blainville, 1826 possui uma sistem?tica complexa e apesar de j? existirem estudos moleculares e morfol?gicos sobre o g?nero, ainda ? dif?cil identificar e classificar estes indiv?duos que possuem uma alta diversifica??o cariot?pica com n?meros dipl?ides variando de 2n= 10 a 2n= 70. Por?m, alguns autores confirmam a utilidade taxon?mica de estruturas como p?nis e baculum no estudo da sistem?tica de roedores.O p?nis, assim como o baculum (osso peniano), tem sido alvo de diversos estudos devido sua grande diversidade morfol?gica. O presente trabalho se baseia no estudo da morfologia externa do glans penes e do baculum de Ctenomys minutus, Ctenomys flamarioni e Ctenomys torquatus com o objetivo de identificar poss?veis varia??es e comparar as diferen?as encontradas. O estudo foi feito a partir dos p?nis fixados de indiv?duos adultos das esp?cies listadas anteriormente. Foram feitas fotografias, dissec??es, desenhos com c?mara clara e diafaniza??o dos p?nis. Para an?lises da microestrutura da superf?cie do glans penes foi utilizado a t?cnica de Microscopia Eletr?nica de Varredura (MEV). Os resultados revelaram grandes diferen?as morfol?gicas na estrutura do baculum das tr?s esp?cies analisadas e revelaram estruturas semelhantes a espinhos que recobriam toda a superf?cie do glans penes com distribui??o variando ao longo da glande. Nossos resultados indicam que o baculum pode ser um excelente marcador taxon?mico em grupos complexos como ? o caso dos Ctenomys. Estudos morfol?gicos da superf?cie do glans penes e do baculum aliados a estudos gen?ticos, moleculares e biogeogr?ficos podem fornecer informa??es importantes para melhor entendermos a sistem?tica, evolu??o e taxonomia do g?nero.
| Identifer | oai:union.ndltd.org:IBICT/oai:localhost:jspui/2351 |
| Date | 09 April 2010 |
| Creators | BERNARDO, Joice dos Santos Lima |
| Contributors | Barbosa, Oscar Rocha, Santos, Jacenir Reis dos, Freitas, Thales Roberto O. de |
| Publisher | Universidade Federal Rural do Rio de Janeiro, Programa de P?s-Gradua??o em Biologia Animal, UFRRJ, Brasil, Instituto de Ci?ncias Biol?gicas |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFRRJ, instname:Universidade Federal Rural do Rio de Janeiro, instacron:UFRRJ |
| Rights | info:eu-repo/semantics/openAccess |
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