A Bayesian phylogeny based on the COI dataset. Information on the sequences used for this analysis is shown in Table 1. Bayesian Posterior Probabilities were given on each node. Caution is needed to interpret the phylogenetic relationship between and among the members of the species groups (e.g., devonica group, consisting of E. devonica and E. ilkleyensis) included herein, due to the scarcity of available genetic data of the species belonging to the genus Eukiefferiella.