Figure 2

Schematic drawing of observed mitogenome gene orders (GOs) with their phylogenetic distribution. Numbers in the Daphnia clade indicate the two subgenera Daphnia (1) and Ctenodaphnia (2). Yellow and cyan genes colour indicate they are coded on the two different strands. AAGO Ancestral Arthropod Gene Order, PanGO Pancrustacea Gene Order. Clado-I gene order pattern is shared by: Da. lumholtzi, Da. barbata, Da. dolichocephala, C. reticulata and Si. serrulatus. Clado-II gene order pattern is shared by: Da. magna and Da. hispanica. Asterisk on P. pediculus indicates it is an incomplete genome. The star indicates the position of Sc. mucronata whose GO could be either Clado-I or Clado-II, but due to mitogenome incompleteness it cannot be determined. Diamonds at nodes indicate ancestral GOs identical to the PanGO pattern, while circles indicate different GOs (brown = Clado-I pattern; white = Anostraca pattern), as reconstructed with MLGO method.