Polyodon spathula

2n=120; 32 m, 8 sm, 8 a, 72 mc, 160 FN Dingerkus G. Howell WM. 1976. Karyotypic analysis and evidence of tetraploidy in the North American paddlefish, Polyodon spathula. Science 194: 842 844 Abstract
2n=120; 48 m+sm, 72 mc Symonová R. Flajšhans M. Gela D. Pelikánová Š. Rábová M. Ráb P. 2010. Tetraploidy in paddlefish, Polyodon spathula? - 34 years later. 19th International Colloquium on animal cytogenetics and gene mapping. Chromosome Research 18:754-754 Abstract

m = metacentric; sm = submetacentric; a = acrocentric; mc = micro chromosomes; FN = fondamental number