Diagram of complete IGS sequences from representatives of four species in the Daphnia pulex complex. Dpc = D. pulicaria, DpxE = European D. pulex, DpxNA = North American D. pulex, Dten = D. tenebrosa. A repeats are represented by rectangles, B repeats by ovals, and C repeats by pentagons. Repeats that cluster with one another in Neighbor-joining dendrograms are indicated by the same color. Open shapes bounded by dashed lines indicate putative deletions. Nonrepetitive regions upstream and downstream of the repeats are shown with thick black lines.