Table 1. List of species and specimens incorporated in the phylogenetic analysis, along with corresponding collection localities, COI gene haplotypes, GenBank accession numbers and references. Each specimen represents a population from a distinct locality. All the four haplotypes recovered from the TCS network were included in the phylogenetic analysis. The four GenBank accession numbers generated in this study correspond to the four identified haplotypes. Pisidia serratifrons (Stimpson, 1858) is the outgroup.

Species/specimens	Localities	Haplotype	GenBank accession number	Reference
Raphidopus xinzhengi Dong, Wan & Wang sp. nov.
QD-Holotype	Qingdao, China	Hap-3	PX405584	This study
YT-Paratype	Yantai, China	Hap-1	PX405585	This study
PJ	Panjin, China	Hap-2	PX405586	This study
WZ	Wenzhou, China	Hap-3	–	This study
CJK	Yangtze River Estuary, China	Hap-1	–	This study
Raphidopus ciliatus Stimpson, 1858
HK-C1	Hong Kong, China	Hap-4	PX405587	This study
HK-C2	Hong Kong, China	Hap-4	–	This study
HK-C3	Hong Kong, China	Hap-4	–	This study
PT	Putian, China	Hap-4	–	This study
DZ	Danzhou, China	Hap-4	–	This study
QZ	Qinzhou, China	Hap-4	–	This study
BH	Beihai, China	Hap-4	–	This study
Pisidia serratifrons (Stimpson, 1858)	–	–	OR460835	Fang et al. 2023