Pimelodus microstoma, Steindachner, 1877

Girardi, Simone C., Pavanelli, Carla S. & Margarido, Vladimir P., 2018, Contributions to the systematic of Pimelodidae (Osteichthyes, Siluriformes): basic and molecular cytogenetics on seven species of Pimelodus from three Brazilian hydrographic systems, Neotropical Ichthyology 16 (2), pp. 1-16 : 6

publication ID

https://doi.org/ 10.1590/1982-0224-20170148

DOI

https://doi.org/10.5281/zenodo.3716982

persistent identifier

https://treatment.plazi.org/id/AA5B879F-FFA3-4C71-3F75-F9C14E92F83C

treatment provided by

Carolina

scientific name

Pimelodus microstoma
status

 

Pimelodus microstoma View in CoL . The diploid number was also 56 chromosomes (24 m + 18 sm + 8 st + 6 a) ( Fig. 1d View Fig ). The AgNORs were located in the terminal region of the long arm of a pair of subtelocentric chromosomes 24 ( Fig. 1d View Fig , box). C-banding highlighted pale heterochromatin in the region of the centromere in the most of chromosomes, with more conspicuous heterochromatin being found in the telomeric region of the short arm (4) and long arm (pairs 16 and 24), in both telomeres (pair 8) and in the pericentromeric region of the long arm in pair 18 ( Fig. 2d View Fig ). The 18S rDNA was located on the subtelocentric chromosome pair (24), which corresponds to the AgNORs, while the 5S rDNA was found in the pericentromeric region of the long arm of pair 18 ( Fig. 3d View Fig ). Pimelodus mysteriosus View in CoL . The diploid number was also 56 chromosomes (28 m + 10 sm + 2 st + 16 a) ( Fig. 1e View Fig ). The AgNORs were located in the terminal region of the long arm of a pair of subtelocentric chromosomes 20 ( Fig. 1e View Fig , box). C-banding highlighted pale heterochromatin in the region of the centromere in the most of chromosomes, with more conspicuous heterochromatin being found in the telomeric region of the short arm (pair 20) and long arm (pairs 5, 17, 20, 21, 22, 23, 24, 26, 27 and 28), in interstitial region (pairs 21 and 23) and in the pericentromeric region of the long arm of pairs 21 and 22 ( Fig. 2e View Fig ). The 18S rDNA was located on the subtelocentric chromosome pair (20), which corresponds to the AgNORs, while the 5S rDNA was found at multiple sites, located in the interstitial region of the long arm of pair 1 and pericentromeric region of the long arm of pairs 21 and 22 ( Fig. 3e View Fig ).

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