Fig. 1: Genetic diversity and phylogenetic relationships of 358 seahorse specimens.

a Geographic sampling locations for sampled seahorses with patterns of nucleotide diversity (π) of the 21 seahorse species across 22 chromosomes. Maps from Wessel et al. (2013) under GNU GPL license91. b Neighbor-joining tree constructed with genome-wide SNPs of 358 seahorses. Location pin symbols in (a) and branch background in (b) correspond to each other. Seahorses illustrations by Geng Qin. Source data are provided as a Source Data file.