Table 1. Sampling information and molecular diversity indices for COI data.

Locality	Abb.	Date of collection	N NU	COI
				N MT(nh, np)	h	π
Zhangzidao, Liaoning	ZZD	11/2008	23	20(12,4)	0.874	0.003
Penglai. Shandong	PL	11/2008	35	20(9,5)	0.653	0.002
Liugongdao, Shandong	LGD	11/2008	32	21(9,4)	0.729	0.003
Rongcheng, Shandong	RC	05/2009	28	20(11,3)	0.805	0.004
Hongdao, Shandong	HD	05/2009	23	20(16,5)	0.947	0.004
Rizhao, Shandong	RZ	06/2009	37	21(13,5)	0.933	0.005
Lianyungang, Jiangsu	LYG	11/2008	30	20(11,6)	0.805	0.003
Haeju, North Korea	HJ	06/2013	35	24(12,5)	0.935	0.006
Zhoushan, Zhejiang*	ZS	–	20	20(14,9)	0.916	0.005
Fuzhou, Fujian*	FZ	–	25	25(17,11)	0.903	0.003

Abbreviation of populations (Abb.), date of collection, number of specimens for nuclear microsatellite analysis (N _NU), and number of specimens for mitochondrial COI analysis (N _MT), number of haplotypes (nh), private haplotypes (np), haplotype diversity (h) and nucleotide diversities (π) based on the COI data for are shown.

*Sequences of Zhoushan and Fuzhou were retrieved from GenBank.