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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

Filogenia da subfamília Corydoradinae (Siluriformes : Callichthyidae)

Britto , Marcelo Ribeiro de January 1997 (has links)
Submitted by Alberto Vieira (martins_vieira@ibest.com.br) on 2018-06-14T18:21:29Z No. of bitstreams: 1 278389.pdf: 17365317 bytes, checksum: 5f174436762a3168beb5c15b54229e85 (MD5) / Made available in DSpace on 2018-06-14T18:21:29Z (GMT). No. of bitstreams: 1 278389.pdf: 17365317 bytes, checksum: 5f174436762a3168beb5c15b54229e85 (MD5) Previous issue date: 1997 / CAPES / Corydoradinae, incluindo os gêneros Aspidoras, Brochis e Corydoras, constitui cerca de 90% da família de bagres neotropicais Callichthyidae, um grupo monofilético bem definido. Uma hipótese filogenética da subfamília é estabelecida com base em 58 caracteres, abrangendo aqueles propostos por REIS (1993) para definir Corydoradinae e suas unidades monofiléticas. Monofiletismo de Corydoradinae é confirmado, assim como de Aspidoras e Brochis. Dois dados principais compõem a subfamília, um com espécies de Corydoras mais relacionadas com Aspidoras do que com Brochis, e outro com espécies mais relacionadas com Brochis. Estes fatores contrastam com a hipótese prévia que considera Brochis e todas as espécies de Corydoras em um agrupamento monofilético, e Aspidoras como seu grupo-irmão. Um clado composto por Aspidoras, C. habrosus, C. paleatus, C. ehrhardti, C. nattereri, (C. grupo hastatus, C. grupo nanus, C. elegans, C. undulatus), (C. ellisae, C. ornatus, C. prionotus, C. reticulatus, C. stenocephalus, (C. septentrionalis (C. grupo barbatus, C. blochi, C. acutus)) é definido pela presença de odontódeos nos infra-orbitais e pré-opérculo, e pela margem livre do opérculo angulada. Um outro dado, ( C. flaveolus ( C. arcuatus ( C. grupo punctatus ( C. triseriatus ( C. garbei (C. aeneus (C. eques (C. grupo rabauti + Brochis)))))))) é definido pela perda de odontódeos no opérculo, homoplásico com Corydoras grupo hastatus. Algumas propostas de classificação são discutidas. / Phylogeny ofthe subfamily Corydoradinae (Siluriformes : Callichthyidae) Corydoradinae, comprising the genera Aspidoras, Brochis and Corydoras, constitutes about 90% of the neotropical catfish family Callichthyidae, a well-defined monophyletic group. A phylogenetic hypothesis within the subfamily is erected with basis on 58 characters, encompassing those proposed by REIS (1993) to define Corydoradinae and its monophyletic units. Monophyly of Corydoradinae is confirmed, as well as for Aspidoras and Brochis. Two major clades compose the subfamily, one with Corydoras species more closely related to Aspidoras than Brochis, and other with species closer to Brochis. These features contrast with the previous hypothesis considering Brochis and all Corydoras species in a monophyletic assemblage and Aspidoras as its sister-group. A clade composed of Aspidoras, C. habrosus, C. paleatus, C. ehrhardti, C. nattereri, (C. hastatus group, C. nanus group, C. elegans, C. undulatus), (C. ellisae, C. ornatus, C. prionotus, C. reticulatus, C. stenocephalus, (C. septentrionalis (C. barbatus group, C. blochi, C. acutus)) is defined by the presence of odontodes on infraorbitals and preopercle, and by an angled free border of opercle. Another clade, (C. flaveolus (C. arcuatus (C. punctatus group (C. triseriatus (C. garbei (C. aeneus (C. eques (C. rabauti group + Brochis)))))))) is defined by the lack of odontodes on opercle, homoplasic with Corydoras hastatus group. Some classification proposals are discussed.

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