Alignment of SSU sequences. Sequences of 13 Pristionchus and one Koerneria species were aligned manually. Dashes (-) indicate identity to the majority consensus sequence at the top; asterisks (*) indicate alignment gaps. Numbering refers to the SSU segment obtained in this study. The sequences have been submitted to the GenBank database and are available under the accession codes DQ270018–DQ270025 and DQ419900–DQ419904.