Alytes obstetricans

Sources

1. Makino, S. (1951). An atlas of the chromosome numbers in animals. Iowa State College Press, Ames.
2. Olmo, E. (1973). Quantitative variations in the nuclear DNA and phylogenesis of the Amphibia. Caryologia 26: 43-68.
3. Ashman, T. L., Bachtrog, D., Blackmon, H., Goldberg, E. E., Hahn, M. W., Kirkpatrick, M., et al. (2014). Tree of Sex: A database of sexual systems. Scientific Data, 1, 140015.
4. Morescalchi, A. 1966. Cariologia comparata di Alytes obstetricans (Laurent) e dei Discoglossidae europei. Revista Biol. 59: 1-24. (with English text: 25-40)R.D. Perkins, J.R. Gamboa, M.M. Jonika, J. Lo, A. Shum, R.H. Adams, H. Blackmon. The Amphibian Karyotype Database. Chromosome Research. https://doi.org/10.1007/s10577-019-09613-1

The sources are listed together. The data does not say which source reports which count.