Statistical parsimony network of Cardiodectes based on 18S rDNA sequences. The network illustrates the genetic differentiation between the newly described Red Sea species, Cardiodectes tofaili n. sp., and the Japanese species, Cardiodectes sp., with the latter being the only sequence available from this genus in GenBank (LC777455). Each circle represents a haplotype, with species distinguished by a different pattern.