Table 2 Pairwised Kimura 2-parameter (K2P) distances at COI within and between the ABGD groups

I

M. chinensis clade I

0.0000–0.0033

II

M. chinensis clade II

0.0820–0.0880

0.0000–0.0000

III

M. chinensis clade III

0.0954–0.1159

0.0824–0.0989

0.0000–0.0278

IV

M. veneriformis

0.1547–0.1678

0.1834–0.1924

0.1557–0.1751

0.0016–0.0206

V

M. alta

0.2006–0.2191

0.2177–0.2305

0.2173–0.2408

0.1791–0.1945

0.0000–0.0032

VI

M. maculata

0.2337–0.2420

0.2307–0.2352

0.2219–0.2407

0.2288–0.2369

0.2712–0.2792

0.0000–0.0000

VII

M. corallina clade I

0.2333–0.2542

0.2394–0.2476

0.2088–0.2423

0.2118–0.2266

0.2597–0.2878

0.2141–0.2259

0.0000–0.0178

VIII

M. corallina lignaria

0.2497–0.2632

0.2528–0.2634

0.2371–0.2817

0.2216–0.2315

0.2762–0.2844

0.2286–0.2286

0.1648–0.1719

0.0000–0.0124

IX

M. corallina clade II

0.2492–0.2542

0.2545–0.2545

0.2473–0.2803

0.2337–0.2385

0.2776–0.2812

0.2068–0.2068

0.1161–0.1274

0.1253–0.1322

c/n

X

M. corallina clade III

0.2247–0.2366

0.2720–0.2747

0.2465–0.2614

0.2128–0.2247

0.2781–0.2894

0.2345–0.2392

0.1659–0.1818

0.1648–0.1719

0.1790–0.1834

0.0017–0.0068