FIGURE 4 The comparative genomic analysis of Corbicula fluminea and other species. (A) Venn diagram of gene families betweenCorbicula fluminea and Crassostrea gigas, Lottia gigantea, Bathymodiolus platifrons, and Crassostrea virginica. (B) Distribution of multiple-copy orthologs, other orthologs, single-copy orthologs, and unique genes in Corbicula fluminea and the above four species. (C) Phylogenetic tree, divergence time, and profiles of gene families that underwent expansion and contraction in 11 species.