Another peculiar karyotypic feature of stick insects relates to the presence/absence and different numbers and sizes of cytological visible satellites, varying among co-generic and even within the same species . For two species from the genus Leptynia, Leptynia montana (2n = 38/37; XX/X0) , L. attenuate (2n = 36/36; XX/XY) (subspecies L. attenuata attenuate, L. attenuata iberica, L. attenuata algarvica) regions enriched for 45S ribosomal deoxyribonucleic acid (rDNA) and telomeric repeats (TTAGG)n were reported .