| General information |
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Hypostomus ancistroides (Ihering, 1911) |
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| Common name | Cascudo bugio |
| Synonyms |
Ophiocephalus studeri Volz, 1903 |
| IUCN Red List status (2014) |
Not Reported |
| Habitat |
Freshwater |
| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Loricariidae. |
| Geographical distribution |
Brazil |
| Occurrence |
native: Brazil |
| Importance |
Food |
| Karyological information |
| Record 1 |
| Geographical area of study |
Dourados stream (DS), municipality of Mandaguari; Maringa stream (MS), municipality of Maringa and Ximbauva stream (XS), municipality of Ourizona, Parana State, Brazil |
| Source of chromosomes |
Not reported |
| Number of specimens with sex |
14 (09 males; 05 females) |
| Diploid chromosome number |
68 |
| Karyotype formula |
14m+12sm+18st+24a (DS); 16m+12sm+18st+22a (MS); 8m |
| Fundamental arm number |
56 (DS)/57 (MS)/52(XS) |
| Chromosome length |
Not reported |
| Sex chromosome |
Not detected |
| Chromosome staining/banding/FISH |
Multiple NORs were present in specimens from Dourados stream (3 pairs), Maringa stream (4 pairs ) and Ximbauva stream (3 pairs ). |
| Reference |
Artoni RF, Bertollo LAC (1996). Cytogenetic studies on Hypostominae (Pisces, Siluriformes, Loricariidae). Considerations on karyotype evolution in the genus Hypostomus., Caryologia: International Journal of Cytology, Cytosystematics and Cytogenetics, 49:1, 81-90. |
| Record 2 |
| Geographical area of study |
Upper Tibagi river basin Ponta Grossa, state of Parana, Brazil |
| Source of chromosomes |
Anterior kidney |
| Number of specimens with sex |
12 (07 males; 05 females) |
| Diploid chromosome number |
66 |
| Karyotype formula |
12m+16sm+10st +28a |
| Fundamental arm number |
104 |
| Chromosome length |
Not reported |
| Sex chromosome |
Not evident |
| Chromosome staining/banding/FISH |
C-banding revealed two large heterochromatic blocks corresponding to short arm of one pair of submetacentric chromosomes and slight labeling in one pair of acrocentric chromosomes. Silver impregnation revealed 4-6 Ag-NORs, all in terminal positions of the chromosome arms with intra-individual variation. These same regions were revealed by double staining with CMA3/DAPI as rich in GC bases and confirmed by FISH with the 18S probe. |
| Reference |
Artoni RF, Bertollo LAC (1996). Cytogenetic studies on Hypostominae (Pisces, Siluriformes, Loricariidae). Considerations on karyotype evolution in the genus Hypostomus., Caryologia: International Journal of Cytology, Cytosystematics and Cytogenetics, 49:1, 81-90. |
| Record 3 |
| Geographical area of study |
Upper Parana basin, Piracicaba and Mogi Guau rivers, State of Sao Paulo, Brazil |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
09 ( 05 males; 04 females) |
| Diploid chromosome number |
68 |
| Karyotype formula |
16m+ 18Sm+ 34st/a |
| Fundamental arm number |
Not reported |
| Chromosome length |
Not reported |
| Sex chromosome |
Not detected |
| Chromosome staining/banding/FISH |
Heterochromatin detected as a large segment on the second metacentric pair and at centromeric region on a few chromosomes. AgNOR located at interstitial region on short arms of m pair 2. The 18S and 5S rDNA sites located syntenic and adjacent. The 5SrDNA is proximal on short arms and the 18S rDNA is adjacent and distal to this site on the m pair 2. |
| Reference |
Artoni RF, Bertollo LAC (1996). Cytogenetic studies on Hypostominae (Pisces, Siluriformes, Loricariidae). Considerations on karyotype evolution in the genus Hypostomus., Caryologia: International Journal of Cytology, Cytosystematics and Cytogenetics, 49:1, 81-90. |
| Record 4 |
| Geographical area of study |
Dourados, Maringá and Ximbaúva streams of municipalities of Mandaguari, Maringá and Ourizona, Paraná State, Brazil. |
| Source of chromosomes |
- |
| Number of specimens with sex |
13 (9 male, 5 female). |
| Diploid chromosome number |
68 |
| Karyotype formula |
14m+12sm+8st+24a (Dourados), 16m+12sm+18st+22a (Maringá), 16m+12sm+18st+22a (Ximbaúva). |
| Fundamental arm number |
56, 57, 52 resp. |
| Chromosome length |
<= 5 μm |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
Multiple NORs found but differing in the type of chromosome pairs. Ag-NOR observed in terminal portion of p-arms of pair 9 and one chromosome of pair 10 (Dourados population). Ag-NOR found in terminal regions of p-arms of chromosome pairs 11 and 15 and only on single chromosome of pair 5 (Maringá population). Three NOR signals found on terminal regions of short arms of only single chromosomes to pairs 3 (metacentric), 5 and 9 (submetacentric) (Ximbaúva population). |
| Reference |
Endo KS, Martinez ERM, Zawadzki CH, Paiva LRS, Júlio Júnior HF (2012). Karyotype description of possible new species of the Hypostomus ancistroides complex (Teleostei: Loricariidae) and other Hypostominae. Acta Sci Biol Sci, 34(2): 181–189. |
| Record 5 |
| Geographical area of study |
Piquiri River, PR, Brazil. |
| Source of chromosomes |
- |
| Number of specimens with sex |
15 (4 male, 11 female) |
| Diploid chromosome number |
68 |
| Karyotype formula |
14m+14sm+8st+32a |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
Multiple Ag-NORs located on terminal region of short arm of chromosome pairs 19 and 20. |
| Reference |
Bueno V, Venere PC, Zawadzki CH, Margarido VP (2013). Karyotypic diversification in Hypostomus Lacépede, 1803 (Siluriformes, Loricariidae): biogeographical and phylogenetic perspectives. Rev Fish Biol Fisheries, 23: 103–112. |
| Record 6 |
| Geographical area of study |
Lapa Stream, Ipeúna city, São Paulo, Brazil. |
| Source of chromosomes |
Anterior kidney. |
| Number of specimens with sex |
21 (11 female, 10 male). |
| Diploid chromosome number |
68 |
| Karyotype formula |
14m+16sm+22st+16a |
| Fundamental arm number |
120 |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
Multiple Ag-NOR present in terminal regions of short arms of chromosome pairs 8, 13 and 15. C-bands present small heterochromatins, distributed over terminal and centromeric re¬gions of several chromosomes. Overlapping observed between heterochromatic sites and NOR in chromosome pair 15. 18S rDNA signal present on pair 15 that confirmed the results of AgNOR. 5S rDNA signals present on three pairs (pair 2 with interstitial marking on p arm, pairs 8, 13 having a syntenic condition with 18S rDNA). |
| Reference |
Traldi JB, Blanco DR, Vicari MR, Martinez JF, Lui RL, Barros AV, Artoni RF, Moreira-Filho O (2013). Chromosomal diversity in Hypostomus (Siluriformes, Loricariidae) with emphasis on physical mapping of 18S and 5S rDNA sites. Genetics and Molecular Research, 12 (1): 463-471. |
| Record 7 |
| Geographical area of study |
Araqua´ river, Botucatu, Sa˜o Paulo, Brazil. |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
9 (4 male, 5 female) |
| Diploid chromosome number |
68 |
| Karyotype formula |
18m+10sm+12st+28a |
| Fundamental arm number |
|
| Chromosome length |
|
| Sex chromosome |
|
| Chromosome staining/banding/FISH |
A subterminal Ag-NORs on short arm of 6th metacentric chromosome pair and two subterminal Ag-NORs on short arm of 13th and 14th submetacentric chromosome pairs. |
| Reference |
Alves AL, Oliveira C, Nirchio M, Granado A, Foresti F (2006). Karyotypic relationships among the tribes of Hypostominae (Siluriformes: Loricariidae) with description of XO sex chromosome system in a Neotropical fish species. Genetica, 128: 1-9. |
| Record 8 |
| Geographical area of study |
Formosa do Oeste, Parana´ State, Brazil. |
| Source of chromosomes |
Kidney |
| Number of specimens with sex |
15 (4 male, 11 female) |
| Diploid chromosome number |
68 |
| Karyotype formula |
14m+14sm+8st+32a |
| Fundamental arm number |
- |
| Chromosome length |
- |
| Sex chromosome |
- |
| Chromosome staining/banding/FISH |
- |
| Reference |
Bueno V, Zawadzki CH, Margarido VP (2012). Trends in chromosome evolution in the genus Hypostomus Lace´pe`de, 1803 (Osteichthyes, Loricariidae): a new perspective about the correlation between diploid number and chromosomes types. Rev Fish Biol Fisheries, 22: 241–250. |
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