TABLE 3 in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia

TABLE 3. Summary of 28S genetic divergences (K2P) between species and genus. A. dufresniiT. nigerA. spatuligeraA. lixulaA. dufresniiT. niger0.00%A. spatuligera0.21%0.21%A. lixula0.67%0.67%0.45%C. floridanus3.17%3.17%3.17%3.56%表3 基于Kimura双参数（K2P）模型的物种与属间28S基因分歧率汇总表 | 分类单元 | A. dufresnii | T. niger | A. spatuligera | A. lixula | C. floridanus | |----------------|--------------|----------|----------------|-----------|---------------| | A. dufresnii | 0.00% | — | — | — | — | | T. niger | 0.00% | 0.00% | — | — | — | | A. spatuligera | 0.21% | 0.21% | 0.00% | — | — | | A. lixula | 0.67% | 0.67% | 0.45% | 0.00% | — | | C. floridanus | 3.17% | 3.17% | 3.17% | 3.56% | 0.00% |