Cytotaxonomy of Parodon nasus and Parodon tortuosus (Pisces, Characiformes). A case of synonymy confirmed by cytogenetic analyses
Genet. mol. biol
;
28(4): 710-716, Dec. 2005. ilus, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-451008
ABSTRACT
Morphological and cytogenetical studies were carried out on the freshwater fish Parodon nasus and Parodon tortuosus in order to evaluate a putative synonymy. The diploid chromosome number observed in both species was 2n = 54 (48M/SM and 6ST) with no differences between the sexes. Despite slight differences in the pattern of heterochromatin distribution and the number of cusps in symphysean teeth, the location of nucleolar organizer regions (NORs) and 5S rRNA genes (both species-specific features) were similar in both species. The remarkable similarity observed between these allopatric species supports recent taxonomical reviews indicating that P. tortuosus is a synonym for P. nasus.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Análise Citogenética
/
Peixes
Limite:
Animais
Idioma:
Inglês
Revista:
Genet. mol. biol
Assunto da revista:
Genética
Ano de publicação:
2005
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Estadual do Oeste do Paraná/BR
/
Universidade Federal de São Carlos/BR
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