) protein sequences in Bivalvia class.\ A consensus tree based on maximum likelihood (ML) topology. The numbers of the nodes show the bootstrap values (BV) \>00% and Bayesian posterior probabilities (BPP) \>0.00, as follows: ML BV/NJ BV/BIs BPP. A black dot at the node represents BV \>00% and BPP \>0.00. 