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| Carvalho,Daniel Cardoso; Perini,Violeta da Rocha; Bastos,Alex Schomaker; Costa,Igor Rodrigues da; Luz,Ronald Kennedy; Furtado,Carolina; Prosdocimi,Francisco. |
| Abstract Lophiosilurus alexandri is an endemic catfish from the São Francisco River Basin (Brazil) popularly known as pacamã, which has economic potential for aquaculture farming. The mitochondrial genome was sequenced for the threatened Neotropical catfish L. alexandri. Assembly into scaffolds using MIRA and MITObim software produced the whole, circularized mitochondrial genome, which comprises 16,445 bp and presents the typical gene arrangement of Teleostei mitochondria. A phylogenomic analysis was performed after the concatenation of all proteins obtained from whole mitogenomes of 20 Siluriformes and two outgroups. The results confirmed the monophyly of nine families of catfishes and also clustered L. alexandri as a sister group to the family... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Mitogenome; Fish; Next-generation-sequencing; Illumina; Pseudopimelodidae. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572016000400674 |
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| Marques,Marilza Barbosa de Almeida; Moreira-Filho,Orlando; Garcia,Caroline; Margarido,Vladimir Pavan. |
| Two Siluriformes species endemic to the São Francisco River basin were characterized by conventional and differential cytogenetic analyses involving C-banding, Ag-nucleolar organizer region (NOR) and chromomycin A3 (CMA3) staining, and FISH (fluorescent in situ hybridization) with 18S and 5S rDNA probes. Conorhynchus conirostris presents a higher diploid number (2n = 60) than those detected in Pimelodidae representatives, whereas Lophiosilurus alexandri, with a karyotype of 2n = 54 chromosomes, presents a chromosomal constitution similar to that found in the family Pseudopimelodidae. Plesiomorphic characteristics such as single NORs at terminal positions are found in both species, as revealed by CMA3 and silver nitrate staining, and FISH with a 18S rDNA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Incertae sedis; Pimelodidae; Pseudopimelodidae; RDNA; Siluriformes. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200008 |
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| Barros,Marcelo D. M.; Guimarães-Cruz,Rodrigo J.; Veloso-Júnior,Vanderlei C.; Santos,José E. dos. |
| The gonad morphology and gametogenesis of Lophiosilurus alexandri Steindachner, 1877 from Santo Antônio river (Minas Gerais, Brazil) were studied through anatomical and histological techniques. Examination of the testis revealed that they were paired, fringed organs with two distinct regions: cranial spermatogenic and caudal spermatogenic and secretory. The cranial region represents ca. 60% of the mature/maturing testis, containing 41 to 73 fringes, while the caudal portion represents ca. 40% and contains 44 to 68 fringes. At the cranial portion the length of the fringes was 3.70 ± 1.70 mm and in the caudal portion was 0.20 ± 0.10 mm. The spermatogenesis was cystic, synchronic, and occurred throughout the whole extension of the seminiferous tubules. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gonads; Morphology; Oogenesis; Pseudopimelodidae; Spermatogenesis. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000100028 |
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