General information |
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| Isbrueckerichthys duseni (Miranda Ribeiro, 1907) | ||
| Common name | Cascudinho | |
| Synonyms |
Hypostomus lacerta (Nichols, 1919) Hemipsilichthys duseni Miranda Ribeiro, 1907 |
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| IUCN Red List status (2014) | Not Reported |
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| Habitat | Freshwater |
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| Systematics |
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Actinopterygii; Neopterygii; Teleostei; Ostariophysi; Siluriformes; Loricariidae. |
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| Geographical distribution | Brazil |
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| Occurrence | Native: Brazil |
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| Importance | Food |
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| Remarks | Nil |
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Karyological information |
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| Geographical area of study | Acungui River (PR), Ribeira River Basin, Brazil. | |
| Source of chromosomes | Not reported |
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| Number of specimens with sex | 43 (20 males; 23 females) |
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| Diploid chromosome number | 54 |
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| Karyotype formula | 20m+20sm+14st |
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| Fundamental arm number | 108 |
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| Chromosome length | Not reported |
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| Sex chromosome | Not reported |
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| Chromosome staining/banding/FISH | Heterochromatin blocks distributed at terminal regions of short arms of pairs 7, 9, 10, 23 and 25, at proximal and equidistant regions in relation to centromere of pairs 13, 14, 15, 16, 17, 19 and 21, plus a large heteromorphic segment in the sm pair 11. This pair was polymorphic, including both heteromorphic and homomorphic cases unrelated to sex. AgNOR located at subterminal region on long arms of sm pair 11. The 18S and 5S rDNAs were located syntenic and adjacent. rDNAs were located at sm pair 11, with subterminal 18S rDNA sites and interstitial 5S rDNA on long arms. The 5S rDNA presented size heteromorphism. |
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| Reference(s) |
Ziemniczak K , Barros AV ,Rosa KO , Nogaroto V , Almeida MC,Cestari MM, Filho OM , Artoni RF, Vicari MR (2012). Comparative cytogenetics of Loricariidae (Actinopterygii: Siluriformes): Emphasis in Neoplecostominae and Hypoptopomatinae, Italian Journal of Zoology, 79:4, 492-501. |
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