Select output fields

Family Genus Specific epithet Specific authority Infraspecific category
2C mean1(pg) 2C mean1(mbp) 2C range1 pg
Chromosome number (2n) Ploidy level
Number of 5S signals Range of 5S signals Position2 of 5S signals (5S P)
Number of 45S3 signals Range of 45S signals Position2 of 45S signals (45S P) Arrangement
Number of chromosomes with both 5S and 45S in the same arm (SA) Number of chromosomes with both 5S and 45S signals (SC)
Original reference Number of chromosomes with co-localized 5S and 45S signals (Coloc.)

Write conditions

Family   Genus   Specific epithet
Chromosome number from: -   Ploidy level from: -

Select filters

Sort by

For help with searching and querying the database, go to HELP

1 source: Animal genome size database (
2 position refers to interstitial, pericentromeric, distal or occupying whole chromosome arm
3 refers to 45S rDNA (18S-5.8S-26S rRNA genes)

Submit your data

You can send your data to using this form.

Data on animal rDNA loci will not be shown until it is finally published (the authors are kindly asked to provide the publication when it is released). If data is unpublished prior submission, these will appear as publication pending at the animal rDNA database (unless otherwise indicated by the authors).

Thank you very much for your collaboration with the animal rDNA database.

Animal rDNA Database