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| Ortiz,Alejandra M; Silvestri,María C; Lavia,Graciela I. |
| Karyotypes of three diploid species belonging to sections Erectoides (Arachis hermannii), Procumbentes (A. rigonii) and Rhizomatosae (A. burkartii) were analyzed by Feulgen's technique. The karyotype formula was different in each of the taxa analyzed: 2n=2x=16m+4sm in A. hermannii, 2n=2x=18m+2sm in A. rigonii, and 2n=2x=20m in A. burkartii. All species had a pair of satellited chromosomes, which corresponded to type 2 in A. hermannii, type 9 in A. rigonii, and type 8 in A. burkartii. Arachis hermannii and A. rigonii presented chromosomal features similar to those of the other species included in their respective sections. However, A. burkartii showed chromosome characteristics different from those found in the rest of the species of section Rhizomatosae. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Arachis hermannii; A. rigonii; A. burkartii; Chromosomes; Phylogenetic relationships. |
| Ano: 2013 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722013000200010 |
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| Carvalho,Marcelo R. de; Gomes,Ulisses L.; Gadig,Otto B. F.. |
| The first report of a western South Atlantic soft skate, genus Malacoraja Stehmann, 1970, is described as Malacoraja obscura, new species, from the southeastern Brazilian continental slope off the states of Espírito Santo and Rio de Janeiro, in depths ranging from 808-1105 m. The new species is known from five specimens and is distinguished from congeners by its unique dorsal coloration with small, faded white spots on disc and pelvic fins, by retaining in larger specimens an irregular row of thorns along dorsal midline of tail (extending from tail base to two-thirds of tail length in 680 mm total length female), and by presenting a ventral tail midline devoid of small denticles only at base (naked region not extending posterior to pelvic fin rear margin).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rajinae; Gurgesiellini; Anatomy; Taxonomy; Systematics; Phylogenetic relationships. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000200002 |
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| González-Ittig,Raul E.; Kandel,Narayan P.; Bonvicino,Cibele R.; Salazar-Bravo,Jorge. |
| ABSTRACT The nominal species Calomys tener (Winge, 1887) ranges broadly in open lands of the Caatinga, Cerrado, Pantanal and Mata Atlântica of Brazil, and was recently reported from the Pampas of southern Brazil, and in the Selva Paranaense of eastern Paraguay and northeastern Argentina. This rodent can be infected with the pathogenic Araraquara hantavirus in Brazil. Given that most epidemiological studies have not taken into account updated taxonomic findings of their rodent hosts, in this study, we obtained sequence data of the Cyt-b and COI genes of specimens of C. tener from 22 different geographical localities from throughout the currently known distribution of the species (including individuals from Argentina, Paraguay, Bolivia, and Brazil) to test... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cyt-b; Phylogenetic relationships; South America. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702019000100311 |
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| Carvalho,Claudio José Barros de. |
| A new genus, Micropotamia, is erected for Phaonia minuscula Albuquerque, 1955 [type-species of the genus], Phaonia cilitibia Albuquerque, 1955 and Azelia amazonica Albuquerque & Lopes, 1982. A key to these three species is given. The female of Micropotamia amazonica is described for the first time, from Roraima. Some character-states of phylogenetic importance and affinities with world Azeliini genera are discussed. Megophyra Emden, 1965 and Potamia Robineau-Desvoidy, 1830 are considered to be most closely related to Micropotamia, gen.n. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Muscidae; Azeliini; Phylogenetic relationships. |
| Ano: 1992 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751992000200009 |
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