Fig. 1From: Massive expansion of P-selectin genes in two Venerida species, Sinonovacula constricta and Mercenaria mercenaria: evidence from comparative genomics of BivalviaThe ultrametric tree, gene family expansion and contraction analyses of M. philippinarum, B. platifrons, S. constricta, M. mercenaria, P. maximus, M. yessoensis, P. fucata, C. gigas, C. virginica and O. bimaculoides. Species of the same order were shaded with the same colorBack to article page