Karyotypes of different strains of the Lariophagus distinguendus species complex (see Table 1 for details). a PFO-D I, male (n = 5) b SLO-GB I, female (2n = 10) c OST-D I, male (n = 6) d OST-D I, female (2n = 12) e F1 hybrid RAV-D I × PFO-DI, female (2n = 11) f progeny of F1 hybrid RAV-D I × PFO-D I, male (n = 5) g ditto (n = 6) h OST-D I, female, aberrant karyotype (the same individual as in d 2n = 13) i FRI-D I, male, aberrant karyotype (n = 7). Scale Bar: 10 μm.