Parauchenipterus galeatus (Linnaeus, 1766)

Santos, Dayane Petik dos, Felicetti, Denise, Baumgärtner, Lucas, Margarido, Vladimir Pavan, Blanco, Daniel Rodrigues, Moreira-Filho, Orlando & Lui, Roberto Laridondo, 2021, Contributions to the taxonomy of Trachelyopterus (Siluriformes): comparative cytogenetic analysis in three species of Auchenipteridae, Neotropical Ichthyology (e 200115) 19 (1), pp. 1-12 : 5

Parauchenipterus galeatus :

Araguaia River basin. Diploid number was 58 chromosomes and karyotype was composed of 20 metacentric, 18 submetacentric, 12 subtelocentric, and 8 acrocentric ( Fig. 1B ). AgNO 3 staining revealed simple NORs allocated in the terminal region on the short arm of the submetacentric pair 24 ( Fig. 1B , in box). C-banding evidenced pale heterochromatin in terminal regions of almost all chromosome pairs ( Fig. 1E ). 18S rDNA-FISH confirmed previous finding by AgNO 3 staining, simple NORs on pair 24. 5S rDNA-FISH detected these sites on short arm of the metacentric chromosome pair 3 ( Fig. 1H ).

Figures

FIGURE 1 | Karyotypes of A. Parauchenipterus striatulus, B. Parauchenipterus galeatus and C. Trachelyopterus coriaceus. Giemsa stained karyotypes. The chromosome pairs marked with silver nitrate are in the boxes; D, E, F. C-banding sequentially karyotypes; G, H, I. Karyotypes hybridized with 5S rDNA and 18S rDNA probes. G. rDNA probe 18S (rhodamine, red signal), 5S rDNA probe (FITC, green signal). H, I. rDNA probe 18S (FITC, green signal), 5S rDNA probe (rhodamine, red signal).